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98 lines
2.7 KiB
98 lines
2.7 KiB
5 years ago
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'use strict';
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const leanPopulateMap = require('./leanPopulateMap');
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const modelSymbol = require('../symbols').modelSymbol;
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const utils = require('../../utils');
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module.exports = assignRawDocsToIdStructure;
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/*!
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* Assign `vals` returned by mongo query to the `rawIds`
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* structure returned from utils.getVals() honoring
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* query sort order if specified by user.
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*
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* This can be optimized.
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*
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* Rules:
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*
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* if the value of the path is not an array, use findOne rules, else find.
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* for findOne the results are assigned directly to doc path (including null results).
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* for find, if user specified sort order, results are assigned directly
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* else documents are put back in original order of array if found in results
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*
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* @param {Array} rawIds
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* @param {Array} vals
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* @param {Boolean} sort
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* @api private
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*/
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function assignRawDocsToIdStructure(rawIds, resultDocs, resultOrder, options, recursed) {
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// honor user specified sort order
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const newOrder = [];
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const sorting = options.sort && rawIds.length > 1;
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const nullIfNotFound = options.$nullIfNotFound;
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let doc;
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let sid;
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let id;
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for (let i = 0; i < rawIds.length; ++i) {
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id = rawIds[i];
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if (Array.isArray(id)) {
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// handle [ [id0, id2], [id3] ]
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assignRawDocsToIdStructure(id, resultDocs, resultOrder, options, true);
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newOrder.push(id);
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continue;
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}
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if (id === null && !sorting) {
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// keep nulls for findOne unless sorting, which always
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// removes them (backward compat)
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newOrder.push(id);
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continue;
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}
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sid = String(id);
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doc = resultDocs[sid];
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// If user wants separate copies of same doc, use this option
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if (options.clone && doc != null) {
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if (options.lean) {
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const _model = leanPopulateMap.get(doc);
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doc = utils.clone(doc);
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leanPopulateMap.set(doc, _model);
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} else {
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doc = doc.constructor.hydrate(doc._doc);
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}
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}
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if (recursed) {
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if (doc) {
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if (sorting) {
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newOrder[resultOrder[sid]] = doc;
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} else {
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newOrder.push(doc);
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}
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} else if (id != null && id[modelSymbol] != null) {
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newOrder.push(id);
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} else {
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newOrder.push(options.retainNullValues || nullIfNotFound ? null : id);
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}
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} else {
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// apply findOne behavior - if document in results, assign, else assign null
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newOrder[i] = doc || null;
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}
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}
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rawIds.length = 0;
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if (newOrder.length) {
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// reassign the documents based on corrected order
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// forEach skips over sparse entries in arrays so we
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// can safely use this to our advantage dealing with sorted
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// result sets too.
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newOrder.forEach(function(doc, i) {
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rawIds[i] = doc;
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});
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}
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}
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