Simple Chat Room in NodeJS, expressJS and mongoDB in Docker Swarm
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4 years ago
'use strict';
const OperationBase = require('./operation').OperationBase;
const updateDocuments = require('./common_functions').updateDocuments;
class UpdateOneOperation extends OperationBase {
constructor(collection, filter, update, options) {
super(options);
this.collection = collection;
this.filter = filter;
this.update = update;
}
execute(callback) {
const coll = this.collection;
const filter = this.filter;
const update = this.update;
const options = this.options;
// Set single document update
options.multi = false;
// Execute update
updateDocuments(coll, filter, update, options, (err, r) => updateCallback(err, r, callback));
}
}
function updateCallback(err, r, callback) {
if (callback == null) return;
if (err) return callback(err);
if (r == null) return callback(null, { result: { ok: 1 } });
r.modifiedCount = r.result.nModified != null ? r.result.nModified : r.result.n;
r.upsertedId =
Array.isArray(r.result.upserted) && r.result.upserted.length > 0
? r.result.upserted[0] // FIXME(major): should be `r.result.upserted[0]._id`
: null;
r.upsertedCount =
Array.isArray(r.result.upserted) && r.result.upserted.length ? r.result.upserted.length : 0;
r.matchedCount =
Array.isArray(r.result.upserted) && r.result.upserted.length > 0 ? 0 : r.result.n;
callback(null, r);
}
module.exports = UpdateOneOperation;