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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-18 23:26:45 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-18 23:26:45 +0100
commit81ddf9b700bc48a1f8e472209f080f9c1d9a9b09 (patch)
tree8b959d50c5a614cbf9fcb346ed556140374d4b6d /node_modules/mongoose/lib/queryhelpers.js
parent1870f3fdf43707a15fda0f609a021f516f45eb63 (diff)
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-'use strict';
-
-/*!
- * Module dependencies
- */
-
-const checkEmbeddedDiscriminatorKeyProjection =
- require('./helpers/discriminator/checkEmbeddedDiscriminatorKeyProjection');
-const get = require('./helpers/get');
-const getDiscriminatorByValue =
- require('./helpers/discriminator/getDiscriminatorByValue');
-const isDefiningProjection = require('./helpers/projection/isDefiningProjection');
-const clone = require('./helpers/clone');
-
-/*!
- * Prepare a set of path options for query population.
- *
- * @param {Query} query
- * @param {Object} options
- * @return {Array}
- */
-
-exports.preparePopulationOptions = function preparePopulationOptions(query, options) {
- const _populate = query.options.populate;
- const pop = Object.keys(_populate).reduce((vals, key) => vals.concat([_populate[key]]), []);
-
- // lean options should trickle through all queries
- if (options.lean != null) {
- pop.
- filter(p => get(p, 'options.lean') == null).
- forEach(makeLean(options.lean));
- }
-
- return pop;
-};
-
-/*!
- * Prepare a set of path options for query population. This is the MongooseQuery
- * version
- *
- * @param {Query} query
- * @param {Object} options
- * @return {Array}
- */
-
-exports.preparePopulationOptionsMQ = function preparePopulationOptionsMQ(query, options) {
- const _populate = query._mongooseOptions.populate;
- const pop = Object.keys(_populate).reduce((vals, key) => vals.concat([_populate[key]]), []);
-
- // lean options should trickle through all queries
- if (options.lean != null) {
- pop.
- filter(p => get(p, 'options.lean') == null).
- forEach(makeLean(options.lean));
- }
-
- const session = get(query, 'options.session', null);
- if (session != null) {
- pop.forEach(path => {
- if (path.options == null) {
- path.options = { session: session };
- return;
- }
- if (!('session' in path.options)) {
- path.options.session = session;
- }
- });
- }
-
- const projection = query._fieldsForExec();
- pop.forEach(p => {
- p._queryProjection = projection;
- });
-
- return pop;
-};
-
-/*!
- * If the document is a mapped discriminator type, it returns a model instance for that type, otherwise,
- * it returns an instance of the given model.
- *
- * @param {Model} model
- * @param {Object} doc
- * @param {Object} fields
- *
- * @return {Document}
- */
-exports.createModel = function createModel(model, doc, fields, userProvidedFields) {
- model.hooks.execPreSync('createModel', doc);
- const discriminatorMapping = model.schema ?
- model.schema.discriminatorMapping :
- null;
-
- const key = discriminatorMapping && discriminatorMapping.isRoot ?
- discriminatorMapping.key :
- null;
-
- const value = doc[key];
- if (key && value && model.discriminators) {
- const discriminator = model.discriminators[value] || getDiscriminatorByValue(model, value);
- if (discriminator) {
- const _fields = clone(userProvidedFields);
- exports.applyPaths(_fields, discriminator.schema);
- return new discriminator(undefined, _fields, true);
- }
- }
-
- return new model(undefined, fields, {
- skipId: true,
- isNew: false,
- willInit: true
- });
-};
-
-/*!
- * ignore
- */
-
-exports.applyPaths = function applyPaths(fields, schema) {
- // determine if query is selecting or excluding fields
- let exclude;
- let keys;
- let keyIndex;
-
- if (fields) {
- keys = Object.keys(fields);
- keyIndex = keys.length;
-
- while (keyIndex--) {
- if (keys[keyIndex][0] === '+') {
- continue;
- }
- const field = fields[keys[keyIndex]];
- // Skip `$meta` and `$slice`
- if (!isDefiningProjection(field)) {
- continue;
- }
- exclude = !field;
- break;
- }
- }
-
- // if selecting, apply default schematype select:true fields
- // if excluding, apply schematype select:false fields
-
- const selected = [];
- const excluded = [];
- const stack = [];
-
- analyzeSchema(schema);
-
- switch (exclude) {
- case true:
- for (const fieldName of excluded) {
- fields[fieldName] = 0;
- }
- break;
- case false:
- if (schema &&
- schema.paths['_id'] &&
- schema.paths['_id'].options &&
- schema.paths['_id'].options.select === false) {
- fields._id = 0;
- }
-
- for (const fieldName of selected) {
- fields[fieldName] = fields[fieldName] || 1;
- }
- break;
- case undefined:
- if (fields == null) {
- break;
- }
- // Any leftover plus paths must in the schema, so delete them (gh-7017)
- for (const key of Object.keys(fields || {})) {
- if (key.startsWith('+')) {
- delete fields[key];
- }
- }
-
- // user didn't specify fields, implies returning all fields.
- // only need to apply excluded fields and delete any plus paths
- for (const fieldName of excluded) {
- fields[fieldName] = 0;
- }
- break;
- }
-
- function analyzeSchema(schema, prefix) {
- prefix || (prefix = '');
-
- // avoid recursion
- if (stack.indexOf(schema) !== -1) {
- return [];
- }
- stack.push(schema);
-
- const addedPaths = [];
- schema.eachPath(function(path, type) {
- if (prefix) path = prefix + '.' + path;
-
- const addedPath = analyzePath(path, type);
- if (addedPath != null) {
- addedPaths.push(addedPath);
- }
-
- // nested schemas
- if (type.schema) {
- const _addedPaths = analyzeSchema(type.schema, path);
-
- // Special case: if discriminator key is the only field that would
- // be projected in, remove it.
- if (exclude === false) {
- checkEmbeddedDiscriminatorKeyProjection(fields, path, type.schema,
- selected, _addedPaths);
- }
- }
- });
-
- stack.pop();
- return addedPaths;
- }
-
- function analyzePath(path, type) {
- const plusPath = '+' + path;
- const hasPlusPath = fields && plusPath in fields;
- if (hasPlusPath) {
- // forced inclusion
- delete fields[plusPath];
- }
-
- if (typeof type.selected !== 'boolean') return;
-
- if (hasPlusPath) {
- // forced inclusion
- delete fields[plusPath];
-
- // if there are other fields being included, add this one
- // if no other included fields, leave this out (implied inclusion)
- if (exclude === false && keys.length > 1 && !~keys.indexOf(path)) {
- fields[path] = 1;
- }
-
- return;
- }
-
- // check for parent exclusions
- const pieces = path.split('.');
- let cur = '';
- for (let i = 0; i < pieces.length; ++i) {
- cur += cur.length ? '.' + pieces[i] : pieces[i];
- if (excluded.indexOf(cur) !== -1) {
- return;
- }
- }
-
- // Special case: if user has included a parent path of a discriminator key,
- // don't explicitly project in the discriminator key because that will
- // project out everything else under the parent path
- if (!exclude && get(type, 'options.$skipDiscriminatorCheck', false)) {
- let cur = '';
- for (let i = 0; i < pieces.length; ++i) {
- cur += (cur.length === 0 ? '' : '.') + pieces[i];
- const projection = get(fields, cur, false) || get(fields, cur + '.$', false);
- if (projection && typeof projection !== 'object') {
- return;
- }
- }
- }
-
- (type.selected ? selected : excluded).push(path);
- return path;
- }
-};
-
-/*!
- * Set each path query option to lean
- *
- * @param {Object} option
- */
-
-function makeLean(val) {
- return function(option) {
- option.options || (option.options = {});
- option.options.lean = val;
- };
-}
-
-/*!
- * Handle the `WriteOpResult` from the server
- */
-
-exports.handleDeleteWriteOpResult = function handleDeleteWriteOpResult(callback) {
- return function _handleDeleteWriteOpResult(error, res) {
- if (error) {
- return callback(error);
- }
- const mongooseResult = Object.assign({}, res.result);
- if (get(res, 'result.n', null) != null) {
- mongooseResult.deletedCount = res.result.n;
- }
- if (res.deletedCount != null) {
- mongooseResult.deletedCount = res.deletedCount;
- }
- return callback(null, mongooseResult);
- };
-};