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69 lines
2.4 KiB
JavaScript
69 lines
2.4 KiB
JavaScript
11 months ago
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'use strict';
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const MongooseError = require('../../error/mongooseError');
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const isPathExcluded = require('../projection/isPathExcluded');
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const lookupLocalFields = require('./lookupLocalFields');
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const mpath = require('mpath');
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const util = require('util');
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const utils = require('../../utils');
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const hasNumericPropRE = /(\.\d+$|\.\d+\.)/g;
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module.exports = function modelNamesFromRefPath(refPath, doc, populatedPath, modelSchema, queryProjection) {
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if (refPath == null) {
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return [];
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}
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if (typeof refPath === 'string' && queryProjection != null && isPathExcluded(queryProjection, refPath)) {
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throw new MongooseError('refPath `' + refPath + '` must not be excluded in projection, got ' +
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util.inspect(queryProjection));
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}
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// If populated path has numerics, the end `refPath` should too. For example,
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// if populating `a.0.b` instead of `a.b` and `b` has `refPath = a.c`, we
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// should return `a.0.c` for the refPath.
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if (hasNumericPropRE.test(populatedPath)) {
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const chunks = populatedPath.split(hasNumericPropRE);
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if (chunks[chunks.length - 1] === '') {
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throw new Error('Can\'t populate individual element in an array');
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}
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let _refPath = '';
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let _remaining = refPath;
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// 2nd, 4th, etc. will be numeric props. For example: `[ 'a', '.0.', 'b' ]`
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for (let i = 0; i < chunks.length; i += 2) {
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const chunk = chunks[i];
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if (_remaining.startsWith(chunk + '.')) {
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_refPath += _remaining.substring(0, chunk.length) + chunks[i + 1];
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_remaining = _remaining.substring(chunk.length + 1);
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} else if (i === chunks.length - 1) {
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_refPath += _remaining;
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_remaining = '';
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break;
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} else {
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throw new Error('Could not normalize ref path, chunk ' + chunk + ' not in populated path');
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}
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}
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const refValue = mpath.get(_refPath, doc, lookupLocalFields);
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let modelNames = Array.isArray(refValue) ? refValue : [refValue];
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modelNames = utils.array.flatten(modelNames);
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return modelNames;
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}
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const refValue = mpath.get(refPath, doc, lookupLocalFields);
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let modelNames;
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if (modelSchema != null && modelSchema.virtuals.hasOwnProperty(refPath)) {
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modelNames = [modelSchema.virtuals[refPath].applyGetters(void 0, doc)];
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} else {
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modelNames = Array.isArray(refValue) ? refValue : [refValue];
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}
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modelNames = utils.array.flatten(modelNames);
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return modelNames;
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};
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