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100 lines
3.0 KiB
100 lines
3.0 KiB
2 months ago
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'use strict';
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const get = require('../get');
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const utils = require('../../utils');
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/**
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* Given a Mongoose index definition (key + options objects) and a MongoDB server
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* index definition, determine if the two indexes are equal.
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*
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* @param {Object} key the Mongoose index spec
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* @param {Object} options the Mongoose index definition's options
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* @param {Object} dbIndex the index in MongoDB as returned by `listIndexes()`
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* @api private
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*/
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module.exports = function isIndexEqual(key, options, dbIndex) {
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// Special case: text indexes have a special format in the db. For example,
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// `{ name: 'text' }` becomes:
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// {
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// v: 2,
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// key: { _fts: 'text', _ftsx: 1 },
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// name: 'name_text',
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// ns: 'test.tests',
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// background: true,
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// weights: { name: 1 },
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// default_language: 'english',
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// language_override: 'language',
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// textIndexVersion: 3
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// }
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if (dbIndex.textIndexVersion != null) {
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// If a compound index involves both text and non-text indexes, we want to extract both (gh-13136)
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const weightsAndKeys = Object.assign({}, dbIndex.weights);
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Object.keys(dbIndex.key)
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.filter(function(key) { return !(key.startsWith('_fts'));})
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.forEach(function(key) { weightsAndKeys[key] = dbIndex.key[key];});
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if (Object.keys(weightsAndKeys).length !== Object.keys(key).length) {
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return false;
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}
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for (const prop of Object.keys(weightsAndKeys)) {
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if (!(prop in key)) {
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return false;
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}
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const weight = weightsAndKeys[prop];
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if (weight !== get(options, 'weights.' + prop) && !(weight === 1 && get(options, 'weights.' + prop) == null)) {
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return false;
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}
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}
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if (options['default_language'] !== dbIndex['default_language']) {
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return dbIndex['default_language'] === 'english' && options['default_language'] == null;
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}
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return true;
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}
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const optionKeys = [
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'unique',
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'partialFilterExpression',
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'sparse',
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'expireAfterSeconds',
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'collation'
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];
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for (const key of optionKeys) {
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if (!(key in options) && !(key in dbIndex)) {
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continue;
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}
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if (key === 'collation') {
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if (options[key] == null || dbIndex[key] == null) {
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return options[key] == null && dbIndex[key] == null;
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}
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const definedKeys = Object.keys(options.collation);
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const schemaCollation = options.collation;
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const dbCollation = dbIndex.collation;
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for (const opt of definedKeys) {
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if (get(schemaCollation, opt) !== get(dbCollation, opt)) {
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return false;
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}
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}
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} else if (!utils.deepEqual(options[key], dbIndex[key])) {
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return false;
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}
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}
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const schemaIndexKeys = Object.keys(key);
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const dbIndexKeys = Object.keys(dbIndex.key);
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if (schemaIndexKeys.length !== dbIndexKeys.length) {
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return false;
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}
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for (let i = 0; i < schemaIndexKeys.length; ++i) {
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if (schemaIndexKeys[i] !== dbIndexKeys[i]) {
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return false;
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}
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if (!utils.deepEqual(key[schemaIndexKeys[i]], dbIndex.key[dbIndexKeys[i]])) {
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return false;
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}
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}
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return true;
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};
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