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Simple Chat Room in NodeJS, expressJS and mongoDB in Docker Swarm
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Chat_Room/web_app/node_modules/mquery/lib/mquery.js

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'use strict';
/**
* Dependencies
*/
var slice = require('sliced');
var assert = require('assert');
var util = require('util');
var utils = require('./utils');
var debug = require('debug')('mquery');
/* global Map */
/**
* Query constructor used for building queries.
*
* ####Example:
*
* var query = new Query({ name: 'mquery' });
* query.setOptions({ collection: moduleCollection })
* query.where('age').gte(21).exec(callback);
*
* @param {Object} [criteria]
* @param {Object} [options]
* @api public
*/
function Query(criteria, options) {
if (!(this instanceof Query))
return new Query(criteria, options);
var proto = this.constructor.prototype;
this.op = proto.op || undefined;
this.options = Object.assign({}, proto.options);
this._conditions = proto._conditions
? utils.clone(proto._conditions)
: {};
this._fields = proto._fields
? utils.clone(proto._fields)
: undefined;
this._update = proto._update
? utils.clone(proto._update)
: undefined;
this._path = proto._path || undefined;
this._distinct = proto._distinct || undefined;
this._collection = proto._collection || undefined;
this._traceFunction = proto._traceFunction || undefined;
if (options) {
this.setOptions(options);
}
if (criteria) {
if (criteria.find && criteria.remove && criteria.update) {
// quack quack!
this.collection(criteria);
} else {
this.find(criteria);
}
}
}
/**
* This is a parameter that the user can set which determines if mquery
* uses $within or $geoWithin for queries. It defaults to true which
* means $geoWithin will be used. If using MongoDB < 2.4 you should
* set this to false.
*
* @api public
* @property use$geoWithin
*/
var $withinCmd = '$geoWithin';
Object.defineProperty(Query, 'use$geoWithin', {
get: function( ) { return $withinCmd == '$geoWithin'; },
set: function(v) {
if (true === v) {
// mongodb >= 2.4
$withinCmd = '$geoWithin';
} else {
$withinCmd = '$within';
}
}
});
/**
* Converts this query to a constructor function with all arguments and options retained.
*
* ####Example
*
* // Create a query that will read documents with a "video" category from
* // `aCollection` on the primary node in the replica-set unless it is down,
* // in which case we'll read from a secondary node.
* var query = mquery({ category: 'video' })
* query.setOptions({ collection: aCollection, read: 'primaryPreferred' });
*
* // create a constructor based off these settings
* var Video = query.toConstructor();
*
* // Video is now a subclass of mquery() and works the same way but with the
* // default query parameters and options set.
*
* // run a query with the previous settings but filter for movies with names
* // that start with "Life".
* Video().where({ name: /^Life/ }).exec(cb);
*
* @return {Query} new Query
* @api public
*/
Query.prototype.toConstructor = function toConstructor() {
function CustomQuery(criteria, options) {
if (!(this instanceof CustomQuery))
return new CustomQuery(criteria, options);
Query.call(this, criteria, options);
}
utils.inherits(CustomQuery, Query);
// set inherited defaults
var p = CustomQuery.prototype;
p.options = {};
p.setOptions(this.options);
p.op = this.op;
p._conditions = utils.clone(this._conditions);
p._fields = utils.clone(this._fields);
p._update = utils.clone(this._update);
p._path = this._path;
p._distinct = this._distinct;
p._collection = this._collection;
p._traceFunction = this._traceFunction;
return CustomQuery;
};
/**
* Sets query options.
*
* ####Options:
*
* - [tailable](http://www.mongodb.org/display/DOCS/Tailable+Cursors) *
* - [sort](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Bsort(\)%7D%7D) *
* - [limit](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Blimit%28%29%7D%7D) *
* - [skip](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Bskip%28%29%7D%7D) *
* - [maxScan](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24maxScan) *
* - [maxTime](http://docs.mongodb.org/manual/reference/operator/meta/maxTimeMS/#op._S_maxTimeMS) *
* - [batchSize](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7BbatchSize%28%29%7D%7D) *
* - [comment](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24comment) *
* - [snapshot](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Bsnapshot%28%29%7D%7D) *
* - [hint](http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24hint) *
* - [slaveOk](http://docs.mongodb.org/manual/applications/replication/#read-preference) *
* - [safe](http://www.mongodb.org/display/DOCS/getLastError+Command)
* - collection the collection to query against
*
* _* denotes a query helper method is also available_
*
* @param {Object} options
* @api public
*/
Query.prototype.setOptions = function(options) {
if (!(options && utils.isObject(options)))
return this;
// set arbitrary options
var methods = utils.keys(options),
method;
for (var i = 0; i < methods.length; ++i) {
method = methods[i];
// use methods if exist (safer option manipulation)
if ('function' == typeof this[method]) {
var args = utils.isArray(options[method])
? options[method]
: [options[method]];
this[method].apply(this, args);
} else {
this.options[method] = options[method];
}
}
return this;
};
/**
* Sets this Querys collection.
*
* @param {Collection} coll
* @return {Query} this
*/
Query.prototype.collection = function collection(coll) {
this._collection = new Query.Collection(coll);
return this;
};
/**
* Adds a collation to this op (MongoDB 3.4 and up)
*
* ####Example
*
* query.find().collation({ locale: "en_US", strength: 1 })
*
* @param {Object} value
* @return {Query} this
* @see MongoDB docs https://docs.mongodb.com/manual/reference/method/cursor.collation/#cursor.collation
* @api public
*/
Query.prototype.collation = function(value) {
this.options.collation = value;
return this;
};
/**
* Specifies a `$where` condition
*
* Use `$where` when you need to select documents using a JavaScript expression.
*
* ####Example
*
* query.$where('this.comments.length > 10 || this.name.length > 5')
*
* query.$where(function () {
* return this.comments.length > 10 || this.name.length > 5;
* })
*
* @param {String|Function} js javascript string or function
* @return {Query} this
* @memberOf Query
* @method $where
* @api public
*/
Query.prototype.$where = function(js) {
this._conditions.$where = js;
return this;
};
/**
* Specifies a `path` for use with chaining.
*
* ####Example
*
* // instead of writing:
* User.find({age: {$gte: 21, $lte: 65}}, callback);
*
* // we can instead write:
* User.where('age').gte(21).lte(65);
*
* // passing query conditions is permitted
* User.find().where({ name: 'vonderful' })
*
* // chaining
* User
* .where('age').gte(21).lte(65)
* .where('name', /^vonderful/i)
* .where('friends').slice(10)
* .exec(callback)
*
* @param {String} [path]
* @param {Object} [val]
* @return {Query} this
* @api public
*/
Query.prototype.where = function() {
if (!arguments.length) return this;
if (!this.op) this.op = 'find';
var type = typeof arguments[0];
if ('string' == type) {
this._path = arguments[0];
if (2 === arguments.length) {
this._conditions[this._path] = arguments[1];
}
return this;
}
if ('object' == type && !Array.isArray(arguments[0])) {
return this.merge(arguments[0]);
}
throw new TypeError('path must be a string or object');
};
/**
* Specifies the complementary comparison value for paths specified with `where()`
*
* ####Example
*
* User.where('age').equals(49);
*
* // is the same as
*
* User.where('age', 49);
*
* @param {Object} val
* @return {Query} this
* @api public
*/
Query.prototype.equals = function equals(val) {
this._ensurePath('equals');
var path = this._path;
this._conditions[path] = val;
return this;
};
/**
* Specifies the complementary comparison value for paths specified with `where()`
* This is alias of `equals`
*
* ####Example
*
* User.where('age').eq(49);
*
* // is the same as
*
* User.shere('age').equals(49);
*
* // is the same as
*
* User.where('age', 49);
*
* @param {Object} val
* @return {Query} this
* @api public
*/
Query.prototype.eq = function eq(val) {
this._ensurePath('eq');
var path = this._path;
this._conditions[path] = val;
return this;
};
/**
* Specifies arguments for an `$or` condition.
*
* ####Example
*
* query.or([{ color: 'red' }, { status: 'emergency' }])
*
* @param {Array} array array of conditions
* @return {Query} this
* @api public
*/
Query.prototype.or = function or(array) {
var or = this._conditions.$or || (this._conditions.$or = []);
if (!utils.isArray(array)) array = [array];
or.push.apply(or, array);
return this;
};
/**
* Specifies arguments for a `$nor` condition.
*
* ####Example
*
* query.nor([{ color: 'green' }, { status: 'ok' }])
*
* @param {Array} array array of conditions
* @return {Query} this
* @api public
*/
Query.prototype.nor = function nor(array) {
var nor = this._conditions.$nor || (this._conditions.$nor = []);
if (!utils.isArray(array)) array = [array];
nor.push.apply(nor, array);
return this;
};
/**
* Specifies arguments for a `$and` condition.
*
* ####Example
*
* query.and([{ color: 'green' }, { status: 'ok' }])
*
* @see $and http://docs.mongodb.org/manual/reference/operator/and/
* @param {Array} array array of conditions
* @return {Query} this
* @api public
*/
Query.prototype.and = function and(array) {
var and = this._conditions.$and || (this._conditions.$and = []);
if (!Array.isArray(array)) array = [array];
and.push.apply(and, array);
return this;
};
/**
* Specifies a $gt query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* ####Example
*
* Thing.find().where('age').gt(21)
*
* // or
* Thing.find().gt('age', 21)
*
* @method gt
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $gte query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method gte
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $lt query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method lt
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $lte query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method lte
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $ne query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method ne
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies an $in query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method in
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies an $nin query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method nin
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies an $all query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method all
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $size query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method size
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/**
* Specifies a $regex query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method regex
* @memberOf Query
* @param {String} [path]
* @param {String|RegExp} val
* @api public
*/
/**
* Specifies a $maxDistance query condition.
*
* When called with one argument, the most recent path passed to `where()` is used.
*
* @method maxDistance
* @memberOf Query
* @param {String} [path]
* @param {Number} val
* @api public
*/
/*!
* gt, gte, lt, lte, ne, in, nin, all, regex, size, maxDistance
*
* Thing.where('type').nin(array)
*/
'gt gte lt lte ne in nin all regex size maxDistance minDistance'.split(' ').forEach(function($conditional) {
Query.prototype[$conditional] = function() {
var path, val;
if (1 === arguments.length) {
this._ensurePath($conditional);
val = arguments[0];
path = this._path;
} else {
val = arguments[1];
path = arguments[0];
}
var conds = this._conditions[path] === null || typeof this._conditions[path] === 'object' ?
this._conditions[path] :
(this._conditions[path] = {});
conds['$' + $conditional] = val;
return this;
};
});
/**
* Specifies a `$mod` condition
*
* @param {String} [path]
* @param {Number} val
* @return {Query} this
* @api public
*/
Query.prototype.mod = function() {
var val, path;
if (1 === arguments.length) {
this._ensurePath('mod');
val = arguments[0];
path = this._path;
} else if (2 === arguments.length && !utils.isArray(arguments[1])) {
this._ensurePath('mod');
val = slice(arguments);
path = this._path;
} else if (3 === arguments.length) {
val = slice(arguments, 1);
path = arguments[0];
} else {
val = arguments[1];
path = arguments[0];
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds.$mod = val;
return this;
};
/**
* Specifies an `$exists` condition
*
* ####Example
*
* // { name: { $exists: true }}
* Thing.where('name').exists()
* Thing.where('name').exists(true)
* Thing.find().exists('name')
*
* // { name: { $exists: false }}
* Thing.where('name').exists(false);
* Thing.find().exists('name', false);
*
* @param {String} [path]
* @param {Number} val
* @return {Query} this
* @api public
*/
Query.prototype.exists = function() {
var path, val;
if (0 === arguments.length) {
this._ensurePath('exists');
path = this._path;
val = true;
} else if (1 === arguments.length) {
if ('boolean' === typeof arguments[0]) {
this._ensurePath('exists');
path = this._path;
val = arguments[0];
} else {
path = arguments[0];
val = true;
}
} else if (2 === arguments.length) {
path = arguments[0];
val = arguments[1];
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds.$exists = val;
return this;
};
/**
* Specifies an `$elemMatch` condition
*
* ####Example
*
* query.elemMatch('comment', { author: 'autobot', votes: {$gte: 5}})
*
* query.where('comment').elemMatch({ author: 'autobot', votes: {$gte: 5}})
*
* query.elemMatch('comment', function (elem) {
* elem.where('author').equals('autobot');
* elem.where('votes').gte(5);
* })
*
* query.where('comment').elemMatch(function (elem) {
* elem.where({ author: 'autobot' });
* elem.where('votes').gte(5);
* })
*
* @param {String|Object|Function} path
* @param {Object|Function} criteria
* @return {Query} this
* @api public
*/
Query.prototype.elemMatch = function() {
if (null == arguments[0])
throw new TypeError('Invalid argument');
var fn, path, criteria;
if ('function' === typeof arguments[0]) {
this._ensurePath('elemMatch');
path = this._path;
fn = arguments[0];
} else if (utils.isObject(arguments[0])) {
this._ensurePath('elemMatch');
path = this._path;
criteria = arguments[0];
} else if ('function' === typeof arguments[1]) {
path = arguments[0];
fn = arguments[1];
} else if (arguments[1] && utils.isObject(arguments[1])) {
path = arguments[0];
criteria = arguments[1];
} else {
throw new TypeError('Invalid argument');
}
if (fn) {
criteria = new Query;
fn(criteria);
criteria = criteria._conditions;
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds.$elemMatch = criteria;
return this;
};
// Spatial queries
/**
* Sugar for geo-spatial queries.
*
* ####Example
*
* query.within().box()
* query.within().circle()
* query.within().geometry()
*
* query.where('loc').within({ center: [50,50], radius: 10, unique: true, spherical: true });
* query.where('loc').within({ box: [[40.73, -73.9], [40.7, -73.988]] });
* query.where('loc').within({ polygon: [[],[],[],[]] });
*
* query.where('loc').within([], [], []) // polygon
* query.where('loc').within([], []) // box
* query.where('loc').within({ type: 'LineString', coordinates: [...] }); // geometry
*
* ####NOTE:
*
* Must be used after `where()`.
*
* @memberOf Query
* @return {Query} this
* @api public
*/
Query.prototype.within = function within() {
// opinionated, must be used after where
this._ensurePath('within');
this._geoComparison = $withinCmd;
if (0 === arguments.length) {
return this;
}
if (2 === arguments.length) {
return this.box.apply(this, arguments);
} else if (2 < arguments.length) {
return this.polygon.apply(this, arguments);
}
var area = arguments[0];
if (!area)
throw new TypeError('Invalid argument');
if (area.center)
return this.circle(area);
if (area.box)
return this.box.apply(this, area.box);
if (area.polygon)
return this.polygon.apply(this, area.polygon);
if (area.type && area.coordinates)
return this.geometry(area);
throw new TypeError('Invalid argument');
};
/**
* Specifies a $box condition
*
* ####Example
*
* var lowerLeft = [40.73083, -73.99756]
* var upperRight= [40.741404, -73.988135]
*
* query.where('loc').within().box(lowerLeft, upperRight)
* query.box('loc', lowerLeft, upperRight )
*
* @see http://www.mongodb.org/display/DOCS/Geospatial+Indexing
* @see Query#within #query_Query-within
* @param {String} path
* @param {Object} val
* @return {Query} this
* @api public
*/
Query.prototype.box = function() {
var path, box;
if (3 === arguments.length) {
// box('loc', [], [])
path = arguments[0];
box = [arguments[1], arguments[2]];
} else if (2 === arguments.length) {
// box([], [])
this._ensurePath('box');
path = this._path;
box = [arguments[0], arguments[1]];
} else {
throw new TypeError('Invalid argument');
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds[this._geoComparison || $withinCmd] = { '$box': box };
return this;
};
/**
* Specifies a $polygon condition
*
* ####Example
*
* query.where('loc').within().polygon([10,20], [13, 25], [7,15])
* query.polygon('loc', [10,20], [13, 25], [7,15])
*
* @param {String|Array} [path]
* @param {Array|Object} [val]
* @return {Query} this
* @see http://www.mongodb.org/display/DOCS/Geospatial+Indexing
* @api public
*/
Query.prototype.polygon = function() {
var val, path;
if ('string' == typeof arguments[0]) {
// polygon('loc', [],[],[])
path = arguments[0];
val = slice(arguments, 1);
} else {
// polygon([],[],[])
this._ensurePath('polygon');
path = this._path;
val = slice(arguments);
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds[this._geoComparison || $withinCmd] = { '$polygon': val };
return this;
};
/**
* Specifies a $center or $centerSphere condition.
*
* ####Example
*
* var area = { center: [50, 50], radius: 10, unique: true }
* query.where('loc').within().circle(area)
* query.center('loc', area);
*
* // for spherical calculations
* var area = { center: [50, 50], radius: 10, unique: true, spherical: true }
* query.where('loc').within().circle(area)
* query.center('loc', area);
*
* @param {String} [path]
* @param {Object} area
* @return {Query} this
* @see http://www.mongodb.org/display/DOCS/Geospatial+Indexing
* @api public
*/
Query.prototype.circle = function() {
var path, val;
if (1 === arguments.length) {
this._ensurePath('circle');
path = this._path;
val = arguments[0];
} else if (2 === arguments.length) {
path = arguments[0];
val = arguments[1];
} else {
throw new TypeError('Invalid argument');
}
if (!('radius' in val && val.center))
throw new Error('center and radius are required');
var conds = this._conditions[path] || (this._conditions[path] = {});
var type = val.spherical
? '$centerSphere'
: '$center';
var wKey = this._geoComparison || $withinCmd;
conds[wKey] = {};
conds[wKey][type] = [val.center, val.radius];
if ('unique' in val)
conds[wKey].$uniqueDocs = !!val.unique;
return this;
};
/**
* Specifies a `$near` or `$nearSphere` condition
*
* These operators return documents sorted by distance.
*
* ####Example
*
* query.where('loc').near({ center: [10, 10] });
* query.where('loc').near({ center: [10, 10], maxDistance: 5 });
* query.where('loc').near({ center: [10, 10], maxDistance: 5, spherical: true });
* query.near('loc', { center: [10, 10], maxDistance: 5 });
* query.near({ center: { type: 'Point', coordinates: [..] }})
* query.near().geometry({ type: 'Point', coordinates: [..] })
*
* @param {String} [path]
* @param {Object} val
* @return {Query} this
* @see http://www.mongodb.org/display/DOCS/Geospatial+Indexing
* @api public
*/
Query.prototype.near = function near() {
var path, val;
this._geoComparison = '$near';
if (0 === arguments.length) {
return this;
} else if (1 === arguments.length) {
this._ensurePath('near');
path = this._path;
val = arguments[0];
} else if (2 === arguments.length) {
path = arguments[0];
val = arguments[1];
} else {
throw new TypeError('Invalid argument');
}
if (!val.center) {
throw new Error('center is required');
}
var conds = this._conditions[path] || (this._conditions[path] = {});
var type = val.spherical
? '$nearSphere'
: '$near';
// center could be a GeoJSON object or an Array
if (Array.isArray(val.center)) {
conds[type] = val.center;
var radius = 'maxDistance' in val
? val.maxDistance
: null;
if (null != radius) {
conds.$maxDistance = radius;
}
if (null != val.minDistance) {
conds.$minDistance = val.minDistance;
}
} else {
// GeoJSON?
if (val.center.type != 'Point' || !Array.isArray(val.center.coordinates)) {
throw new Error(util.format('Invalid GeoJSON specified for %s', type));
}
conds[type] = { $geometry : val.center };
// MongoDB 2.6 insists on maxDistance being in $near / $nearSphere
if ('maxDistance' in val) {
conds[type]['$maxDistance'] = val.maxDistance;
}
if ('minDistance' in val) {
conds[type]['$minDistance'] = val.minDistance;
}
}
return this;
};
/**
* Declares an intersects query for `geometry()`.
*
* ####Example
*
* query.where('path').intersects().geometry({
* type: 'LineString'
* , coordinates: [[180.0, 11.0], [180, 9.0]]
* })
*
* query.where('path').intersects({
* type: 'LineString'
* , coordinates: [[180.0, 11.0], [180, 9.0]]
* })
*
* @param {Object} [arg]
* @return {Query} this
* @api public
*/
Query.prototype.intersects = function intersects() {
// opinionated, must be used after where
this._ensurePath('intersects');
this._geoComparison = '$geoIntersects';
if (0 === arguments.length) {
return this;
}
var area = arguments[0];
if (null != area && area.type && area.coordinates)
return this.geometry(area);
throw new TypeError('Invalid argument');
};
/**
* Specifies a `$geometry` condition
*
* ####Example
*
* var polyA = [[[ 10, 20 ], [ 10, 40 ], [ 30, 40 ], [ 30, 20 ]]]
* query.where('loc').within().geometry({ type: 'Polygon', coordinates: polyA })
*
* // or
* var polyB = [[ 0, 0 ], [ 1, 1 ]]
* query.where('loc').within().geometry({ type: 'LineString', coordinates: polyB })
*
* // or
* var polyC = [ 0, 0 ]
* query.where('loc').within().geometry({ type: 'Point', coordinates: polyC })
*
* // or
* query.where('loc').intersects().geometry({ type: 'Point', coordinates: polyC })
*
* ####NOTE:
*
* `geometry()` **must** come after either `intersects()` or `within()`.
*
* The `object` argument must contain `type` and `coordinates` properties.
* - type {String}
* - coordinates {Array}
*
* The most recent path passed to `where()` is used.
*
* @param {Object} object Must contain a `type` property which is a String and a `coordinates` property which is an Array. See the examples.
* @return {Query} this
* @see http://docs.mongodb.org/manual/release-notes/2.4/#new-geospatial-indexes-with-geojson-and-improved-spherical-geometry
* @see http://www.mongodb.org/display/DOCS/Geospatial+Indexing
* @see $geometry http://docs.mongodb.org/manual/reference/operator/geometry/
* @api public
*/
Query.prototype.geometry = function geometry() {
if (!('$within' == this._geoComparison ||
'$geoWithin' == this._geoComparison ||
'$near' == this._geoComparison ||
'$geoIntersects' == this._geoComparison)) {
throw new Error('geometry() must come after `within()`, `intersects()`, or `near()');
}
var val, path;
if (1 === arguments.length) {
this._ensurePath('geometry');
path = this._path;
val = arguments[0];
} else {
throw new TypeError('Invalid argument');
}
if (!(val.type && Array.isArray(val.coordinates))) {
throw new TypeError('Invalid argument');
}
var conds = this._conditions[path] || (this._conditions[path] = {});
conds[this._geoComparison] = { $geometry: val };
return this;
};
// end spatial
/**
* Specifies which document fields to include or exclude
*
* ####String syntax
*
* When passing a string, prefixing a path with `-` will flag that path as excluded. When a path does not have the `-` prefix, it is included.
*
* ####Example
*
* // include a and b, exclude c
* query.select('a b -c');
*
* // or you may use object notation, useful when
* // you have keys already prefixed with a "-"
* query.select({a: 1, b: 1, c: 0});
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @param {Object|String} arg
* @return {Query} this
* @see SchemaType
* @api public
*/
Query.prototype.select = function select() {
var arg = arguments[0];
if (!arg) return this;
if (arguments.length !== 1) {
throw new Error('Invalid select: select only takes 1 argument');
}
this._validate('select');
var fields = this._fields || (this._fields = {});
var type = typeof arg;
var i, len;
if (('string' == type || utils.isArgumentsObject(arg)) &&
'number' == typeof arg.length || Array.isArray(arg)) {
if ('string' == type)
arg = arg.split(/\s+/);
for (i = 0, len = arg.length; i < len; ++i) {
var field = arg[i];
if (!field) continue;
var include = '-' == field[0] ? 0 : 1;
if (include === 0) field = field.substring(1);
fields[field] = include;
}
return this;
}
if (utils.isObject(arg)) {
var keys = utils.keys(arg);
for (i = 0; i < keys.length; ++i) {
fields[keys[i]] = arg[keys[i]];
}
return this;
}
throw new TypeError('Invalid select() argument. Must be string or object.');
};
/**
* Specifies a $slice condition for a `path`
*
* ####Example
*
* query.slice('comments', 5)
* query.slice('comments', -5)
* query.slice('comments', [10, 5])
* query.where('comments').slice(5)
* query.where('comments').slice([-10, 5])
*
* @param {String} [path]
* @param {Number} val number/range of elements to slice
* @return {Query} this
* @see mongodb http://www.mongodb.org/display/DOCS/Retrieving+a+Subset+of+Fields#RetrievingaSubsetofFields-RetrievingaSubrangeofArrayElements
* @api public
*/
Query.prototype.slice = function() {
if (0 === arguments.length)
return this;
this._validate('slice');
var path, val;
if (1 === arguments.length) {
var arg = arguments[0];
if (typeof arg === 'object' && !Array.isArray(arg)) {
var keys = Object.keys(arg);
var numKeys = keys.length;
for (var i = 0; i < numKeys; ++i) {
this.slice(keys[i], arg[keys[i]]);
}
return this;
}
this._ensurePath('slice');
path = this._path;
val = arguments[0];
} else if (2 === arguments.length) {
if ('number' === typeof arguments[0]) {
this._ensurePath('slice');
path = this._path;
val = slice(arguments);
} else {
path = arguments[0];
val = arguments[1];
}
} else if (3 === arguments.length) {
path = arguments[0];
val = slice(arguments, 1);
}
var myFields = this._fields || (this._fields = {});
myFields[path] = { '$slice': val };
return this;
};
/**
* Sets the sort order
*
* If an object is passed, values allowed are 'asc', 'desc', 'ascending', 'descending', 1, and -1.
*
* If a string is passed, it must be a space delimited list of path names. The sort order of each path is ascending unless the path name is prefixed with `-` which will be treated as descending.
*
* ####Example
*
* // these are equivalent
* query.sort({ field: 'asc', test: -1 });
* query.sort('field -test');
* query.sort([['field', 1], ['test', -1]]);
*
* ####Note
*
* - The array syntax `.sort([['field', 1], ['test', -1]])` can only be used with [mongodb driver >= 2.0.46](https://github.com/mongodb/node-mongodb-native/blob/2.1/HISTORY.md#2046-2015-10-15).
* - Cannot be used with `distinct()`
*
* @param {Object|String|Array} arg
* @return {Query} this
* @api public
*/
Query.prototype.sort = function(arg) {
if (!arg) return this;
var i, len, field;
this._validate('sort');
var type = typeof arg;
// .sort([['field', 1], ['test', -1]])
if (Array.isArray(arg)) {
len = arg.length;
for (i = 0; i < arg.length; ++i) {
if (!Array.isArray(arg[i])) {
throw new Error('Invalid sort() argument, must be array of arrays');
}
_pushArr(this.options, arg[i][0], arg[i][1]);
}
return this;
}
// .sort('field -test')
if (1 === arguments.length && 'string' == type) {
arg = arg.split(/\s+/);
len = arg.length;
for (i = 0; i < len; ++i) {
field = arg[i];
if (!field) continue;
var ascend = '-' == field[0] ? -1 : 1;
if (ascend === -1) field = field.substring(1);
push(this.options, field, ascend);
}
return this;
}
// .sort({ field: 1, test: -1 })
if (utils.isObject(arg)) {
var keys = utils.keys(arg);
for (i = 0; i < keys.length; ++i) {
field = keys[i];
push(this.options, field, arg[field]);
}
return this;
}
if (typeof Map !== 'undefined' && arg instanceof Map) {
_pushMap(this.options, arg);
return this;
}
throw new TypeError('Invalid sort() argument. Must be a string, object, or array.');
};
/*!
* @ignore
*/
var _validSortValue = {
'1': 1,
'-1': -1,
'asc': 1,
'ascending': 1,
'desc': -1,
'descending': -1
};
function push(opts, field, value) {
if (Array.isArray(opts.sort)) {
throw new TypeError('Can\'t mix sort syntaxes. Use either array or object:' +
'\n- `.sort([[\'field\', 1], [\'test\', -1]])`' +
'\n- `.sort({ field: 1, test: -1 })`');
}
var s;
if (value && value.$meta) {
s = opts.sort || (opts.sort = {});
s[field] = { $meta : value.$meta };
return;
}
s = opts.sort || (opts.sort = {});
var val = String(value || 1).toLowerCase();
val = _validSortValue[val];
if (!val) throw new TypeError('Invalid sort value: { ' + field + ': ' + value + ' }');
s[field] = val;
}
function _pushArr(opts, field, value) {
opts.sort = opts.sort || [];
if (!Array.isArray(opts.sort)) {
throw new TypeError('Can\'t mix sort syntaxes. Use either array or object:' +
'\n- `.sort([[\'field\', 1], [\'test\', -1]])`' +
'\n- `.sort({ field: 1, test: -1 })`');
}
var val = String(value || 1).toLowerCase();
val = _validSortValue[val];
if (!val) throw new TypeError('Invalid sort value: [ ' + field + ', ' + value + ' ]');
opts.sort.push([field, val]);
}
function _pushMap(opts, map) {
opts.sort = opts.sort || new Map();
if (!(opts.sort instanceof Map)) {
throw new TypeError('Can\'t mix sort syntaxes. Use either array or ' +
'object or map consistently');
}
map.forEach(function(value, key) {
var val = String(value || 1).toLowerCase();
val = _validSortValue[val];
if (!val) throw new TypeError('Invalid sort value: < ' + key + ': ' + value + ' >');
opts.sort.set(key, val);
});
}
/**
* Specifies the limit option.
*
* ####Example
*
* query.limit(20)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @method limit
* @memberOf Query
* @param {Number} val
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Blimit%28%29%7D%7D
* @api public
*/
/**
* Specifies the skip option.
*
* ####Example
*
* query.skip(100).limit(20)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @method skip
* @memberOf Query
* @param {Number} val
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Bskip%28%29%7D%7D
* @api public
*/
/**
* Specifies the maxScan option.
*
* ####Example
*
* query.maxScan(100)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @method maxScan
* @memberOf Query
* @param {Number} val
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24maxScan
* @api public
*/
/**
* Specifies the batchSize option.
*
* ####Example
*
* query.batchSize(100)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @method batchSize
* @memberOf Query
* @param {Number} val
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7BbatchSize%28%29%7D%7D
* @api public
*/
/**
* Specifies the `comment` option.
*
* ####Example
*
* query.comment('login query')
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @method comment
* @memberOf Query
* @param {Number} val
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24comment
* @api public
*/
/*!
* limit, skip, maxScan, batchSize, comment
*
* Sets these associated options.
*
* query.comment('feed query');
*/
['limit', 'skip', 'maxScan', 'batchSize', 'comment'].forEach(function(method) {
Query.prototype[method] = function(v) {
this._validate(method);
this.options[method] = v;
return this;
};
});
/**
* Specifies the maxTimeMS option.
*
* ####Example
*
* query.maxTime(100)
* query.maxTimeMS(100)
*
* @method maxTime
* @memberOf Query
* @param {Number} ms
* @see mongodb http://docs.mongodb.org/manual/reference/operator/meta/maxTimeMS/#op._S_maxTimeMS
* @api public
*/
Query.prototype.maxTime = Query.prototype.maxTimeMS = function(ms) {
this._validate('maxTime');
this.options.maxTimeMS = ms;
return this;
};
/**
* Specifies this query as a `snapshot` query.
*
* ####Example
*
* mquery().snapshot() // true
* mquery().snapshot(true)
* mquery().snapshot(false)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Bsnapshot%28%29%7D%7D
* @return {Query} this
* @api public
*/
Query.prototype.snapshot = function() {
this._validate('snapshot');
this.options.snapshot = arguments.length
? !!arguments[0]
: true;
return this;
};
/**
* Sets query hints.
*
* ####Example
*
* query.hint({ indexA: 1, indexB: -1});
* query.hint('indexA_1_indexB_1');
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @param {Object|string} val a hint object or the index name
* @return {Query} this
* @see mongodb http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24hint
* @api public
*/
Query.prototype.hint = function() {
if (0 === arguments.length) return this;
this._validate('hint');
var arg = arguments[0];
if (utils.isObject(arg)) {
var hint = this.options.hint || (this.options.hint = {});
// must keep object keys in order so don't use Object.keys()
for (var k in arg) {
hint[k] = arg[k];
}
return this;
}
if (typeof arg === 'string') {
this.options.hint = arg;
return this;
}
throw new TypeError('Invalid hint. ' + arg);
};
/**
* Requests acknowledgement that this operation has been persisted to MongoDB's
* on-disk journal.
* This option is only valid for operations that write to the database:
*
* - `deleteOne()`
* - `deleteMany()`
* - `findOneAndDelete()`
* - `findOneAndUpdate()`
* - `remove()`
* - `update()`
* - `updateOne()`
* - `updateMany()`
*
* Defaults to the `j` value if it is specified in writeConcern options
*
* ####Example:
*
* mquery().w(2).j(true).wtimeout(2000);
*
* @method j
* @memberOf Query
* @instance
* @param {boolean} val
* @see mongodb https://docs.mongodb.com/manual/reference/write-concern/#j-option
* @return {Query} this
* @api public
*/
Query.prototype.j = function j(val) {
this.options.j = val;
return this;
};
/**
* Sets the slaveOk option. _Deprecated_ in MongoDB 2.2 in favor of read preferences.
*
* ####Example:
*
* query.slaveOk() // true
* query.slaveOk(true)
* query.slaveOk(false)
*
* @deprecated use read() preferences instead if on mongodb >= 2.2
* @param {Boolean} v defaults to true
* @see mongodb http://docs.mongodb.org/manual/applications/replication/#read-preference
* @see read()
* @return {Query} this
* @api public
*/
Query.prototype.slaveOk = function(v) {
this.options.slaveOk = arguments.length ? !!v : true;
return this;
};
/**
* Sets the readPreference option for the query.
*
* ####Example:
*
* new Query().read('primary')
* new Query().read('p') // same as primary
*
* new Query().read('primaryPreferred')
* new Query().read('pp') // same as primaryPreferred
*
* new Query().read('secondary')
* new Query().read('s') // same as secondary
*
* new Query().read('secondaryPreferred')
* new Query().read('sp') // same as secondaryPreferred
*
* new Query().read('nearest')
* new Query().read('n') // same as nearest
*
* // you can also use mongodb.ReadPreference class to also specify tags
* new Query().read(mongodb.ReadPreference('secondary', [{ dc:'sf', s: 1 },{ dc:'ma', s: 2 }]))
*
* new Query().setReadPreference('primary') // alias of .read()
*
* ####Preferences:
*
* primary - (default) Read from primary only. Operations will produce an error if primary is unavailable. Cannot be combined with tags.
* secondary Read from secondary if available, otherwise error.
* primaryPreferred Read from primary if available, otherwise a secondary.
* secondaryPreferred Read from a secondary if available, otherwise read from the primary.
* nearest All operations read from among the nearest candidates, but unlike other modes, this option will include both the primary and all secondaries in the random selection.
*
* Aliases
*
* p primary
* pp primaryPreferred
* s secondary
* sp secondaryPreferred
* n nearest
*
* Read more about how to use read preferences [here](http://docs.mongodb.org/manual/applications/replication/#read-preference) and [here](http://mongodb.github.com/node-mongodb-native/driver-articles/anintroductionto1_1and2_2.html#read-preferences).
*
* @param {String|ReadPreference} pref one of the listed preference options or their aliases
* @see mongodb http://docs.mongodb.org/manual/applications/replication/#read-preference
* @see driver http://mongodb.github.com/node-mongodb-native/driver-articles/anintroductionto1_1and2_2.html#read-preferences
* @return {Query} this
* @api public
*/
Query.prototype.read = Query.prototype.setReadPreference = function(pref) {
if (arguments.length > 1 && !Query.prototype.read.deprecationWarningIssued) {
console.error('Deprecation warning: \'tags\' argument is not supported anymore in Query.read() method. Please use mongodb.ReadPreference object instead.');
Query.prototype.read.deprecationWarningIssued = true;
}
this.options.readPreference = utils.readPref(pref);
return this;
};
/**
* Sets the readConcern option for the query.
*
* ####Example:
*
* new Query().readConcern('local')
* new Query().readConcern('l') // same as local
*
* new Query().readConcern('available')
* new Query().readConcern('a') // same as available
*
* new Query().readConcern('majority')
* new Query().readConcern('m') // same as majority
*
* new Query().readConcern('linearizable')
* new Query().readConcern('lz') // same as linearizable
*
* new Query().readConcern('snapshot')
* new Query().readConcern('s') // same as snapshot
*
* new Query().r('s') // r is alias of readConcern
*
*
* ####Read Concern Level:
*
* local MongoDB 3.2+ The query returns from the instance with no guarantee guarantee that the data has been written to a majority of the replica set members (i.e. may be rolled back).
* available MongoDB 3.6+ The query returns from the instance with no guarantee guarantee that the data has been written to a majority of the replica set members (i.e. may be rolled back).
* majority MongoDB 3.2+ The query returns the data that has been acknowledged by a majority of the replica set members. The documents returned by the read operation are durable, even in the event of failure.
* linearizable MongoDB 3.4+ The query returns data that reflects all successful majority-acknowledged writes that completed prior to the start of the read operation. The query may wait for concurrently executing writes to propagate to a majority of replica set members before returning results.
* snapshot MongoDB 4.0+ Only available for operations within multi-document transactions. Upon transaction commit with write concern "majority", the transaction operations are guaranteed to have read from a snapshot of majority-committed data.
*
*
* Aliases
*
* l local
* a available
* m majority
* lz linearizable
* s snapshot
*
* Read more about how to use read concern [here](https://docs.mongodb.com/manual/reference/read-concern/).
*
* @param {String} level one of the listed read concern level or their aliases
* @see mongodb https://docs.mongodb.com/manual/reference/read-concern/
* @return {Query} this
* @api public
*/
Query.prototype.readConcern = Query.prototype.r = function(level) {
this.options.readConcern = utils.readConcern(level);
return this;
};
/**
* Sets tailable option.
*
* ####Example
*
* query.tailable() <== true
* query.tailable(true)
* query.tailable(false)
*
* ####Note
*
* Cannot be used with `distinct()`
*
* @param {Boolean} v defaults to true
* @see mongodb http://www.mongodb.org/display/DOCS/Tailable+Cursors
* @api public
*/
Query.prototype.tailable = function() {
this._validate('tailable');
this.options.tailable = arguments.length
? !!arguments[0]
: true;
return this;
};
/**
* Sets the specified number of `mongod` servers, or tag set of `mongod` servers,
* that must acknowledge this write before this write is considered successful.
* This option is only valid for operations that write to the database:
*
* - `deleteOne()`
* - `deleteMany()`
* - `findOneAndDelete()`
* - `findOneAndUpdate()`
* - `remove()`
* - `update()`
* - `updateOne()`
* - `updateMany()`
*
* Defaults to the `w` value if it is specified in writeConcern options
*
* ####Example:
*
* mquery().writeConcern(0)
* mquery().writeConcern(1)
* mquery().writeConcern({ w: 1, j: true, wtimeout: 2000 })
* mquery().writeConcern('majority')
* mquery().writeConcern('m') // same as majority
* mquery().writeConcern('tagSetName') // if the tag set is 'm', use .writeConcern({ w: 'm' }) instead
* mquery().w(1) // w is alias of writeConcern
*
* @method writeConcern
* @memberOf Query
* @instance
* @param {String|number|object} concern 0 for fire-and-forget, 1 for acknowledged by one server, 'majority' for majority of the replica set, or [any of the more advanced options](https://docs.mongodb.com/manual/reference/write-concern/#w-option).
* @see mongodb https://docs.mongodb.com/manual/reference/write-concern/#w-option
* @return {Query} this
* @api public
*/
Query.prototype.writeConcern = Query.prototype.w = function writeConcern(concern) {
if ('object' === typeof concern) {
if ('undefined' !== typeof concern.j) this.options.j = concern.j;
if ('undefined' !== typeof concern.w) this.options.w = concern.w;
if ('undefined' !== typeof concern.wtimeout) this.options.wtimeout = concern.wtimeout;
} else {
this.options.w = 'm' === concern ? 'majority' : concern;
}
return this;
};
/**
* Specifies a time limit, in milliseconds, for the write concern.
* If `ms > 1`, it is maximum amount of time to wait for this write
* to propagate through the replica set before this operation fails.
* The default is `0`, which means no timeout.
*
* This option is only valid for operations that write to the database:
*
* - `deleteOne()`
* - `deleteMany()`
* - `findOneAndDelete()`
* - `findOneAndUpdate()`
* - `remove()`
* - `update()`
* - `updateOne()`
* - `updateMany()`
*
* Defaults to `wtimeout` value if it is specified in writeConcern
*
* ####Example:
*
* mquery().w(2).j(true).wtimeout(2000)
*
* @method wtimeout
* @memberOf Query
* @instance
* @param {number} ms number of milliseconds to wait
* @see mongodb https://docs.mongodb.com/manual/reference/write-concern/#wtimeout
* @return {Query} this
* @api public
*/
Query.prototype.wtimeout = Query.prototype.wTimeout = function wtimeout(ms) {
this.options.wtimeout = ms;
return this;
};
/**
* Merges another Query or conditions object into this one.
*
* When a Query is passed, conditions, field selection and options are merged.
*
* @param {Query|Object} source
* @return {Query} this
*/
Query.prototype.merge = function(source) {
if (!source)
return this;
if (!Query.canMerge(source))
throw new TypeError('Invalid argument. Expected instanceof mquery or plain object');
if (source instanceof Query) {
// if source has a feature, apply it to ourselves
if (source._conditions) {
utils.merge(this._conditions, source._conditions);
}
if (source._fields) {
this._fields || (this._fields = {});
utils.merge(this._fields, source._fields);
}
if (source.options) {
this.options || (this.options = {});
utils.merge(this.options, source.options);
}
if (source._update) {
this._update || (this._update = {});
utils.mergeClone(this._update, source._update);
}
if (source._distinct) {
this._distinct = source._distinct;
}
return this;
}
// plain object
utils.merge(this._conditions, source);
return this;
};
/**
* Finds documents.
*
* Passing a `callback` executes the query.
*
* ####Example
*
* query.find()
* query.find(callback)
* query.find({ name: 'Burning Lights' }, callback)
*
* @param {Object} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.find = function(criteria, callback) {
this.op = 'find';
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
}
if (!callback) return this;
var conds = this._conditions;
var options = this._optionsForExec();
if (this.$useProjection) {
options.projection = this._fieldsForExec();
} else {
options.fields = this._fieldsForExec();
}
debug('find', this._collection.collectionName, conds, options);
callback = this._wrapCallback('find', callback, {
conditions: conds,
options: options
});
this._collection.find(conds, options, utils.tick(callback));
return this;
};
/**
* Returns the query cursor
*
* ####Examples
*
* query.find().cursor();
* query.cursor({ name: 'Burning Lights' });
*
* @param {Object} [criteria] mongodb selector
* @return {Object} cursor
* @api public
*/
Query.prototype.cursor = function cursor(criteria) {
if (this.op) {
if (this.op !== 'find') {
throw new TypeError('.cursor only support .find method');
}
} else {
this.find(criteria);
}
var conds = this._conditions;
var options = this._optionsForExec();
if (this.$useProjection) {
options.projection = this._fieldsForExec();
} else {
options.fields = this._fieldsForExec();
}
debug('findCursor', this._collection.collectionName, conds, options);
return this._collection.findCursor(conds, options);
};
/**
* Executes the query as a findOne() operation.
*
* Passing a `callback` executes the query.
*
* ####Example
*
* query.findOne().where('name', /^Burning/);
*
* query.findOne({ name: /^Burning/ })
*
* query.findOne({ name: /^Burning/ }, callback); // executes
*
* query.findOne(function (err, doc) {
* if (err) return handleError(err);
* if (doc) {
* // doc may be null if no document matched
*
* }
* });
*
* @param {Object|Query} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.findOne = function(criteria, callback) {
this.op = 'findOne';
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
}
if (!callback) return this;
var conds = this._conditions;
var options = this._optionsForExec();
if (this.$useProjection) {
options.projection = this._fieldsForExec();
} else {
options.fields = this._fieldsForExec();
}
debug('findOne', this._collection.collectionName, conds, options);
callback = this._wrapCallback('findOne', callback, {
conditions: conds,
options: options
});
this._collection.findOne(conds, options, utils.tick(callback));
return this;
};
/**
* Exectues the query as a count() operation.
*
* Passing a `callback` executes the query.
*
* ####Example
*
* query.count().where('color', 'black').exec(callback);
*
* query.count({ color: 'black' }).count(callback)
*
* query.count({ color: 'black' }, callback)
*
* query.where('color', 'black').count(function (err, count) {
* if (err) return handleError(err);
* console.log('there are %d kittens', count);
* })
*
* @param {Object} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @see mongodb http://www.mongodb.org/display/DOCS/Aggregation#Aggregation-Count
* @api public
*/
Query.prototype.count = function(criteria, callback) {
this.op = 'count';
this._validate();
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
}
if (!callback) return this;
var conds = this._conditions,
options = this._optionsForExec();
debug('count', this._collection.collectionName, conds, options);
callback = this._wrapCallback('count', callback, {
conditions: conds,
options: options
});
this._collection.count(conds, options, utils.tick(callback));
return this;
};
/**
* Declares or executes a distinct() operation.
*
* Passing a `callback` executes the query.
*
* ####Example
*
* distinct(criteria, field, fn)
* distinct(criteria, field)
* distinct(field, fn)
* distinct(field)
* distinct(fn)
* distinct()
*
* @param {Object|Query} [criteria]
* @param {String} [field]
* @param {Function} [callback]
* @return {Query} this
* @see mongodb http://www.mongodb.org/display/DOCS/Aggregation#Aggregation-Distinct
* @api public
*/
Query.prototype.distinct = function(criteria, field, callback) {
this.op = 'distinct';
this._validate();
if (!callback) {
switch (typeof field) {
case 'function':
callback = field;
if ('string' == typeof criteria) {
field = criteria;
criteria = undefined;
}
break;
case 'undefined':
case 'string':
break;
default:
throw new TypeError('Invalid `field` argument. Must be string or function');
}
switch (typeof criteria) {
case 'function':
callback = criteria;
criteria = field = undefined;
break;
case 'string':
field = criteria;
criteria = undefined;
break;
}
}
if ('string' == typeof field) {
this._distinct = field;
}
if (Query.canMerge(criteria)) {
this.merge(criteria);
}
if (!callback) {
return this;
}
if (!this._distinct) {
throw new Error('No value for `distinct` has been declared');
}
var conds = this._conditions,
options = this._optionsForExec();
debug('distinct', this._collection.collectionName, conds, options);
callback = this._wrapCallback('distinct', callback, {
conditions: conds,
options: options
});
this._collection.distinct(this._distinct, conds, options, utils.tick(callback));
return this;
};
/**
* Declare and/or execute this query as an update() operation. By default,
* `update()` only modifies the _first_ document that matches `criteria`.
*
* _All paths passed that are not $atomic operations will become $set ops._
*
* ####Example
*
* mquery({ _id: id }).update({ title: 'words' }, ...)
*
* becomes
*
* collection.update({ _id: id }, { $set: { title: 'words' }}, ...)
*
* ####Note
*
* Passing an empty object `{}` as the doc will result in a no-op unless the `overwrite` option is passed. Without the `overwrite` option set, the update operation will be ignored and the callback executed without sending the command to MongoDB so as to prevent accidently overwritting documents in the collection.
*
* ####Note
*
* The operation is only executed when a callback is passed. To force execution without a callback (which would be an unsafe write), we must first call update() and then execute it by using the `exec()` method.
*
* var q = mquery(collection).where({ _id: id });
* q.update({ $set: { name: 'bob' }}).update(); // not executed
*
* var q = mquery(collection).where({ _id: id });
* q.update({ $set: { name: 'bob' }}).exec(); // executed as unsafe
*
* // keys that are not $atomic ops become $set.
* // this executes the same command as the previous example.
* q.update({ name: 'bob' }).where({ _id: id }).exec();
*
* var q = mquery(collection).update(); // not executed
*
* // overwriting with empty docs
* var q.where({ _id: id }).setOptions({ overwrite: true })
* q.update({ }, callback); // executes
*
* // multi update with overwrite to empty doc
* var q = mquery(collection).where({ _id: id });
* q.setOptions({ multi: true, overwrite: true })
* q.update({ });
* q.update(callback); // executed
*
* // multi updates
* mquery()
* .collection(coll)
* .update({ name: /^match/ }, { $set: { arr: [] }}, { multi: true }, callback)
* // more multi updates
* mquery({ })
* .collection(coll)
* .setOptions({ multi: true })
* .update({ $set: { arr: [] }}, callback)
*
* // single update by default
* mquery({ email: 'address@example.com' })
* .collection(coll)
* .update({ $inc: { counter: 1 }}, callback)
*
* // summary
* update(criteria, doc, opts, cb) // executes
* update(criteria, doc, opts)
* update(criteria, doc, cb) // executes
* update(criteria, doc)
* update(doc, cb) // executes
* update(doc)
* update(cb) // executes
* update(true) // executes (unsafe write)
* update()
*
* @param {Object} [criteria]
* @param {Object} [doc] the update command
* @param {Object} [options]
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.update = function update(criteria, doc, options, callback) {
var force;
switch (arguments.length) {
case 3:
if ('function' == typeof options) {
callback = options;
options = undefined;
}
break;
case 2:
if ('function' == typeof doc) {
callback = doc;
doc = criteria;
criteria = undefined;
}
break;
case 1:
switch (typeof criteria) {
case 'function':
callback = criteria;
criteria = options = doc = undefined;
break;
case 'boolean':
// execution with no callback (unsafe write)
force = criteria;
criteria = undefined;
break;
default:
doc = criteria;
criteria = options = undefined;
break;
}
}
return _update(this, 'update', criteria, doc, options, force, callback);
};
/**
* Declare and/or execute this query as an `updateMany()` operation. Identical
* to `update()` except `updateMany()` will update _all_ documents that match
* `criteria`, rather than just the first one.
*
* _All paths passed that are not $atomic operations will become $set ops._
*
* ####Example
*
* // Update every document whose `title` contains 'test'
* mquery().updateMany({ title: /test/ }, { year: 2017 })
*
* @param {Object} [criteria]
* @param {Object} [doc] the update command
* @param {Object} [options]
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.updateMany = function updateMany(criteria, doc, options, callback) {
var force;
switch (arguments.length) {
case 3:
if ('function' == typeof options) {
callback = options;
options = undefined;
}
break;
case 2:
if ('function' == typeof doc) {
callback = doc;
doc = criteria;
criteria = undefined;
}
break;
case 1:
switch (typeof criteria) {
case 'function':
callback = criteria;
criteria = options = doc = undefined;
break;
case 'boolean':
// execution with no callback (unsafe write)
force = criteria;
criteria = undefined;
break;
default:
doc = criteria;
criteria = options = undefined;
break;
}
}
return _update(this, 'updateMany', criteria, doc, options, force, callback);
};
/**
* Declare and/or execute this query as an `updateOne()` operation. Identical
* to `update()` except `updateOne()` will _always_ update just one document,
* regardless of the `multi` option.
*
* _All paths passed that are not $atomic operations will become $set ops._
*
* ####Example
*
* // Update the first document whose `title` contains 'test'
* mquery().updateMany({ title: /test/ }, { year: 2017 })
*
* @param {Object} [criteria]
* @param {Object} [doc] the update command
* @param {Object} [options]
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.updateOne = function updateOne(criteria, doc, options, callback) {
var force;
switch (arguments.length) {
case 3:
if ('function' == typeof options) {
callback = options;
options = undefined;
}
break;
case 2:
if ('function' == typeof doc) {
callback = doc;
doc = criteria;
criteria = undefined;
}
break;
case 1:
switch (typeof criteria) {
case 'function':
callback = criteria;
criteria = options = doc = undefined;
break;
case 'boolean':
// execution with no callback (unsafe write)
force = criteria;
criteria = undefined;
break;
default:
doc = criteria;
criteria = options = undefined;
break;
}
}
return _update(this, 'updateOne', criteria, doc, options, force, callback);
};
/**
* Declare and/or execute this query as an `replaceOne()` operation. Similar
* to `updateOne()`, except `replaceOne()` is not allowed to use atomic
* modifiers (`$set`, `$push`, etc.). Calling `replaceOne()` will always
* replace the existing doc.
*
* ####Example
*
* // Replace the document with `_id` 1 with `{ _id: 1, year: 2017 }`
* mquery().replaceOne({ _id: 1 }, { year: 2017 })
*
* @param {Object} [criteria]
* @param {Object} [doc] the update command
* @param {Object} [options]
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.replaceOne = function replaceOne(criteria, doc, options, callback) {
var force;
switch (arguments.length) {
case 3:
if ('function' == typeof options) {
callback = options;
options = undefined;
}
break;
case 2:
if ('function' == typeof doc) {
callback = doc;
doc = criteria;
criteria = undefined;
}
break;
case 1:
switch (typeof criteria) {
case 'function':
callback = criteria;
criteria = options = doc = undefined;
break;
case 'boolean':
// execution with no callback (unsafe write)
force = criteria;
criteria = undefined;
break;
default:
doc = criteria;
criteria = options = undefined;
break;
}
}
this.setOptions({ overwrite: true });
return _update(this, 'replaceOne', criteria, doc, options, force, callback);
};
/*!
* Internal helper for update, updateMany, updateOne
*/
function _update(query, op, criteria, doc, options, force, callback) {
query.op = op;
if (Query.canMerge(criteria)) {
query.merge(criteria);
}
if (doc) {
query._mergeUpdate(doc);
}
if (utils.isObject(options)) {
// { overwrite: true }
query.setOptions(options);
}
// we are done if we don't have callback and they are
// not forcing an unsafe write.
if (!(force || callback)) {
return query;
}
if (!query._update ||
!query.options.overwrite && 0 === utils.keys(query._update).length) {
callback && utils.soon(callback.bind(null, null, 0));
return query;
}
options = query._optionsForExec();
if (!callback) options.safe = false;
criteria = query._conditions;
doc = query._updateForExec();
debug('update', query._collection.collectionName, criteria, doc, options);
callback = query._wrapCallback(op, callback, {
conditions: criteria,
doc: doc,
options: options
});
query._collection[op](criteria, doc, options, utils.tick(callback));
return query;
}
/**
* Declare and/or execute this query as a remove() operation.
*
* ####Example
*
* mquery(collection).remove({ artist: 'Anne Murray' }, callback)
*
* ####Note
*
* The operation is only executed when a callback is passed. To force execution without a callback (which would be an unsafe write), we must first call remove() and then execute it by using the `exec()` method.
*
* // not executed
* var query = mquery(collection).remove({ name: 'Anne Murray' })
*
* // executed
* mquery(collection).remove({ name: 'Anne Murray' }, callback)
* mquery(collection).remove({ name: 'Anne Murray' }).remove(callback)
*
* // executed without a callback (unsafe write)
* query.exec()
*
* // summary
* query.remove(conds, fn); // executes
* query.remove(conds)
* query.remove(fn) // executes
* query.remove()
*
* @param {Object|Query} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.remove = function(criteria, callback) {
this.op = 'remove';
var force;
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
} else if (true === criteria) {
force = criteria;
criteria = undefined;
}
if (!(force || callback))
return this;
var options = this._optionsForExec();
if (!callback) options.safe = false;
var conds = this._conditions;
debug('remove', this._collection.collectionName, conds, options);
callback = this._wrapCallback('remove', callback, {
conditions: conds,
options: options
});
this._collection.remove(conds, options, utils.tick(callback));
return this;
};
/**
* Declare and/or execute this query as a `deleteOne()` operation. Behaves like
* `remove()`, except for ignores the `justOne` option and always deletes at
* most one document.
*
* ####Example
*
* mquery(collection).deleteOne({ artist: 'Anne Murray' }, callback)
*
* @param {Object|Query} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.deleteOne = function(criteria, callback) {
this.op = 'deleteOne';
var force;
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
} else if (true === criteria) {
force = criteria;
criteria = undefined;
}
if (!(force || callback))
return this;
var options = this._optionsForExec();
if (!callback) options.safe = false;
delete options.justOne;
var conds = this._conditions;
debug('deleteOne', this._collection.collectionName, conds, options);
callback = this._wrapCallback('deleteOne', callback, {
conditions: conds,
options: options
});
this._collection.deleteOne(conds, options, utils.tick(callback));
return this;
};
/**
* Declare and/or execute this query as a `deleteMany()` operation. Behaves like
* `remove()`, except for ignores the `justOne` option and always deletes
* _every_ document that matches `criteria`.
*
* ####Example
*
* mquery(collection).deleteMany({ artist: 'Anne Murray' }, callback)
*
* @param {Object|Query} [criteria] mongodb selector
* @param {Function} [callback]
* @return {Query} this
* @api public
*/
Query.prototype.deleteMany = function(criteria, callback) {
this.op = 'deleteMany';
var force;
if ('function' === typeof criteria) {
callback = criteria;
criteria = undefined;
} else if (Query.canMerge(criteria)) {
this.merge(criteria);
} else if (true === criteria) {
force = criteria;
criteria = undefined;
}
if (!(force || callback))
return this;
var options = this._optionsForExec();
if (!callback) options.safe = false;
delete options.justOne;
var conds = this._conditions;
debug('deleteOne', this._collection.collectionName, conds, options);
callback = this._wrapCallback('deleteOne', callback, {
conditions: conds,
options: options
});
this._collection.deleteMany(conds, options, utils.tick(callback));
return this;
};
/**
* Issues a mongodb [findAndModify](http://www.mongodb.org/display/DOCS/findAndModify+Command) update command.
*
* Finds a matching document, updates it according to the `update` arg, passing any `options`, and returns the found document (if any) to the callback. The query executes immediately if `callback` is passed.
*
* ####Available options
*
* - `new`: bool - true to return the modified document rather than the original. defaults to true
* - `upsert`: bool - creates the object if it doesn't exist. defaults to false.
* - `sort`: if multiple docs are found by the conditions, sets the sort order to choose which doc to update
*
* ####Examples
*
* query.findOneAndUpdate(conditions, update, options, callback) // executes
* query.findOneAndUpdate(conditions, update, options) // returns Query
* query.findOneAndUpdate(conditions, update, callback) // executes
* query.findOneAndUpdate(conditions, update) // returns Query
* query.findOneAndUpdate(update, callback) // returns Query
* query.findOneAndUpdate(update) // returns Query
* query.findOneAndUpdate(callback) // executes
* query.findOneAndUpdate() // returns Query
*
* @param {Object|Query} [query]
* @param {Object} [doc]
* @param {Object} [options]
* @param {Function} [callback]
* @see mongodb http://www.mongodb.org/display/DOCS/findAndModify+Command
* @return {Query} this
* @api public
*/
Query.prototype.findOneAndUpdate = function(criteria, doc, options, callback) {
this.op = 'findOneAndUpdate';
this._validate();
switch (arguments.length) {
case 3:
if ('function' == typeof options) {
callback = options;
options = {};
}
break;
case 2:
if ('function' == typeof doc) {
callback = doc;
doc = criteria;
criteria = undefined;
}
options = undefined;
break;
case 1:
if ('function' == typeof criteria) {
callback = criteria;
criteria = options = doc = undefined;
} else {
doc = criteria;
criteria = options = undefined;
}
}
if (Query.canMerge(criteria)) {
this.merge(criteria);
}
// apply doc
if (doc) {
this._mergeUpdate(doc);
}
options && this.setOptions(options);
if (!callback) return this;
return this._findAndModify('update', callback);
};
/**
* Issues a mongodb [findAndModify](http://www.mongodb.org/display/DOCS/findAndModify+Command) remove command.
*
* Finds a matching document, removes it, passing the found document (if any) to the callback. Executes immediately if `callback` is passed.
*
* ####Available options
*
* - `sort`: if multiple docs are found by the conditions, sets the sort order to choose which doc to update
*
* ####Examples
*
* A.where().findOneAndRemove(conditions, options, callback) // executes
* A.where().findOneAndRemove(conditions, options) // return Query
* A.where().findOneAndRemove(conditions, callback) // executes
* A.where().findOneAndRemove(conditions) // returns Query
* A.where().findOneAndRemove(callback) // executes
* A.where().findOneAndRemove() // returns Query
* A.where().findOneAndDelete() // alias of .findOneAndRemove()
*
* @param {Object} [conditions]
* @param {Object} [options]
* @param {Function} [callback]
* @return {Query} this
* @see mongodb http://www.mongodb.org/display/DOCS/findAndModify+Command
* @api public
*/
Query.prototype.findOneAndRemove = Query.prototype.findOneAndDelete = function(conditions, options, callback) {
this.op = 'findOneAndRemove';
this._validate();
if ('function' == typeof options) {
callback = options;
options = undefined;
} else if ('function' == typeof conditions) {
callback = conditions;
conditions = undefined;
}
// apply conditions
if (Query.canMerge(conditions)) {
this.merge(conditions);
}
// apply options
options && this.setOptions(options);
if (!callback) return this;
return this._findAndModify('remove', callback);
};
/**
* _findAndModify
*
* @param {String} type - either "remove" or "update"
* @param {Function} callback
* @api private
*/
Query.prototype._findAndModify = function(type, callback) {
assert.equal('function', typeof callback);
var options = this._optionsForExec();
var fields;
var doc;
if ('remove' == type) {
options.remove = true;
} else {
if (!('new' in options)) options.new = true;
if (!('upsert' in options)) options.upsert = false;
doc = this._updateForExec();
if (!doc) {
if (options.upsert) {
// still need to do the upsert to empty doc
doc = { $set: {} };
} else {
return this.findOne(callback);
}
}
}
fields = this._fieldsForExec();
if (fields != null) {
if (this.$useProjection) {
options.projection = this._fieldsForExec();
} else {
options.fields = this._fieldsForExec();
}
}
var conds = this._conditions;
debug('findAndModify', this._collection.collectionName, conds, doc, options);
callback = this._wrapCallback('findAndModify', callback, {
conditions: conds,
doc: doc,
options: options
});
this._collection.findAndModify(conds, doc, options, utils.tick(callback));
return this;
};
/**
* Wrap callback to add tracing
*
* @param {Function} callback
* @param {Object} [queryInfo]
* @api private
*/
Query.prototype._wrapCallback = function(method, callback, queryInfo) {
var traceFunction = this._traceFunction || Query.traceFunction;
if (traceFunction) {
queryInfo.collectionName = this._collection.collectionName;
var traceCallback = traceFunction &&
traceFunction.call(null, method, queryInfo, this);
var startTime = new Date().getTime();
return function wrapperCallback(err, result) {
if (traceCallback) {
var millis = new Date().getTime() - startTime;
traceCallback.call(null, err, result, millis);
}
if (callback) {
callback.apply(null, arguments);
}
};
}
return callback;
};
/**
* Add trace function that gets called when the query is executed.
* The function will be called with (method, queryInfo, query) and
* should return a callback function which will be called
* with (err, result, millis) when the query is complete.
*
* queryInfo is an object containing: {
* collectionName: <name of the collection>,
* conditions: <query criteria>,
* options: <comment, fields, readPreference, etc>,
* doc: [document to update, if applicable]
* }
*
* NOTE: Does not trace stream queries.
*
* @param {Function} traceFunction
* @return {Query} this
* @api public
*/
Query.prototype.setTraceFunction = function(traceFunction) {
this._traceFunction = traceFunction;
return this;
};
/**
* Executes the query
*
* ####Examples
*
* query.exec();
* query.exec(callback);
* query.exec('update');
* query.exec('find', callback);
*
* @param {String|Function} [operation]
* @param {Function} [callback]
* @api public
*/
Query.prototype.exec = function exec(op, callback) {
switch (typeof op) {
case 'function':
callback = op;
op = null;
break;
case 'string':
this.op = op;
break;
}
assert.ok(this.op, 'Missing query type: (find, update, etc)');
if ('update' == this.op || 'remove' == this.op) {
callback || (callback = true);
}
var _this = this;
if ('function' == typeof callback) {
this[this.op](callback);
} else {
return new Query.Promise(function(success, error) {
_this[_this.op](function(err, val) {
if (err) error(err);
else success(val);
success = error = null;
});
});
}
};
/**
* Returns a thunk which when called runs this.exec()
*
* The thunk receives a callback function which will be
* passed to `this.exec()`
*
* @return {Function}
* @api public
*/
Query.prototype.thunk = function() {
var _this = this;
return function(cb) {
_this.exec(cb);
};
};
/**
* Executes the query returning a `Promise` which will be
* resolved with either the doc(s) or rejected with the error.
*
* @param {Function} [resolve]
* @param {Function} [reject]
* @return {Promise}
* @api public
*/
Query.prototype.then = function(resolve, reject) {
var _this = this;
var promise = new Query.Promise(function(success, error) {
_this.exec(function(err, val) {
if (err) error(err);
else success(val);
success = error = null;
});
});
return promise.then(resolve, reject);
};
/**
* Returns a stream for the given find query.
*
* @throws Error if operation is not a find
* @returns {Stream} Node 0.8 style
*/
Query.prototype.stream = function(streamOptions) {
if ('find' != this.op)
throw new Error('stream() is only available for find');
var conds = this._conditions;
var options = this._optionsForExec();
if (this.$useProjection) {
options.projection = this._fieldsForExec();
} else {
options.fields = this._fieldsForExec();
}
debug('stream', this._collection.collectionName, conds, options, streamOptions);
return this._collection.findStream(conds, options, streamOptions);
};
/**
* Determines if field selection has been made.
*
* @return {Boolean}
* @api public
*/
Query.prototype.selected = function selected() {
return !!(this._fields && Object.keys(this._fields).length > 0);
};
/**
* Determines if inclusive field selection has been made.
*
* query.selectedInclusively() // false
* query.select('name')
* query.selectedInclusively() // true
* query.selectedExlusively() // false
*
* @returns {Boolean}
*/
Query.prototype.selectedInclusively = function selectedInclusively() {
if (!this._fields) return false;
var keys = Object.keys(this._fields);
if (0 === keys.length) return false;
for (var i = 0; i < keys.length; ++i) {
var key = keys[i];
if (0 === this._fields[key]) return false;
if (this._fields[key] &&
typeof this._fields[key] === 'object' &&
this._fields[key].$meta) {
return false;
}
}
return true;
};
/**
* Determines if exclusive field selection has been made.
*
* query.selectedExlusively() // false
* query.select('-name')
* query.selectedExlusively() // true
* query.selectedInclusively() // false
*
* @returns {Boolean}
*/
Query.prototype.selectedExclusively = function selectedExclusively() {
if (!this._fields) return false;
var keys = Object.keys(this._fields);
if (0 === keys.length) return false;
for (var i = 0; i < keys.length; ++i) {
var key = keys[i];
if (0 === this._fields[key]) return true;
}
return false;
};
/**
* Merges `doc` with the current update object.
*
* @param {Object} doc
*/
Query.prototype._mergeUpdate = function(doc) {
if (!this._update) this._update = {};
if (doc instanceof Query) {
if (doc._update) {
utils.mergeClone(this._update, doc._update);
}
} else {
utils.mergeClone(this._update, doc);
}
};
/**
* Returns default options.
*
* @return {Object}
* @api private
*/
Query.prototype._optionsForExec = function() {
var options = utils.clone(this.options);
return options;
};
/**
* Returns fields selection for this query.
*
* @return {Object}
* @api private
*/
Query.prototype._fieldsForExec = function() {
return utils.clone(this._fields);
};
/**
* Return an update document with corrected $set operations.
*
* @api private
*/
Query.prototype._updateForExec = function() {
var update = utils.clone(this._update),
ops = utils.keys(update),
i = ops.length,
ret = {};
while (i--) {
var op = ops[i];
if (this.options.overwrite) {
ret[op] = update[op];
continue;
}
if ('$' !== op[0]) {
// fix up $set sugar
if (!ret.$set) {
if (update.$set) {
ret.$set = update.$set;
} else {
ret.$set = {};
}
}
ret.$set[op] = update[op];
ops.splice(i, 1);
if (!~ops.indexOf('$set')) ops.push('$set');
} else if ('$set' === op) {
if (!ret.$set) {
ret[op] = update[op];
}
} else {
ret[op] = update[op];
}
}
this._compiledUpdate = ret;
return ret;
};
/**
* Make sure _path is set.
*
* @parmam {String} method
*/
Query.prototype._ensurePath = function(method) {
if (!this._path) {
var msg = method + '() must be used after where() '
+ 'when called with these arguments';
throw new Error(msg);
}
};
/*!
* Permissions
*/
Query.permissions = require('./permissions');
Query._isPermitted = function(a, b) {
var denied = Query.permissions[b];
if (!denied) return true;
return true !== denied[a];
};
Query.prototype._validate = function(action) {
var fail;
var validator;
if (undefined === action) {
validator = Query.permissions[this.op];
if ('function' != typeof validator) return true;
fail = validator(this);
} else if (!Query._isPermitted(action, this.op)) {
fail = action;
}
if (fail) {
throw new Error(fail + ' cannot be used with ' + this.op);
}
};
/**
* Determines if `conds` can be merged using `mquery().merge()`
*
* @param {Object} conds
* @return {Boolean}
*/
Query.canMerge = function(conds) {
return conds instanceof Query || utils.isObject(conds);
};
/**
* Set a trace function that will get called whenever a
* query is executed.
*
* See `setTraceFunction()` for details.
*
* @param {Object} conds
* @return {Boolean}
*/
Query.setGlobalTraceFunction = function(traceFunction) {
Query.traceFunction = traceFunction;
};
/*!
* Exports.
*/
Query.utils = utils;
Query.env = require('./env');
Query.Collection = require('./collection');
Query.BaseCollection = require('./collection/collection');
Query.Promise = require('bluebird');
module.exports = exports = Query;
// TODO
// test utils