2018-11-12 21:54:22 +00:00
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// Copyright IBM Corp. 2013,2016. All Rights Reserved.
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// Node module: loopback-datasource-juggler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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// Turning on strict for this file breaks lots of test cases;
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// disabling strict for this file
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/* eslint-disable strict */
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module.exports = ModelUtils;
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/*!
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* Module dependencies
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*/
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2018-12-07 16:13:48 +00:00
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const g = require('strong-globalize')();
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const geo = require('./geo');
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const utils = require('./utils');
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const fieldsToArray = utils.fieldsToArray;
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const sanitizeQueryOrData = utils.sanitizeQuery;
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const BaseModel = require('./model');
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2018-11-12 21:54:22 +00:00
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/**
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* A mixin to contain utility methods for DataAccessObject
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*/
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function ModelUtils() {
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}
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/**
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* Verify if allowExtendedOperators is enabled
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* @options {Object} [options] Optional options to use.
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* @property {Boolean} allowExtendedOperators.
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* @returns {Boolean} Returns `true` if allowExtendedOperators is enabled, else `false`.
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*/
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ModelUtils._allowExtendedOperators = function(options) {
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const flag = this._getSetting('allowExtendedOperators', options);
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if (flag != null) return !!flag;
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// Default to `false`
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return false;
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};
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/**
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* Get settings via hierarchical determination
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* - method level options
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* - model level settings
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* - data source level settings
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*
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* @param {String} key The setting key
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*/
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ModelUtils._getSetting = function(key, options) {
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// Check method level options
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let val = options && options[key];
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if (val !== undefined) return val;
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// Check for settings in model
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const m = this.definition;
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if (m && m.settings) {
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val = m.settings[key];
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if (val !== undefined) {
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return m.settings[key];
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}
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// Fall back to data source level
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}
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// Check for settings in connector
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const ds = this.getDataSource();
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if (ds && ds.settings) {
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return ds.settings[key];
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}
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return undefined;
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};
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const operators = {
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eq: '=',
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gt: '>',
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gte: '>=',
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lt: '<',
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lte: '<=',
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between: 'BETWEEN',
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inq: 'IN',
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nin: 'NOT IN',
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neq: '!=',
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like: 'LIKE',
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nlike: 'NOT LIKE',
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ilike: 'ILIKE',
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nilike: 'NOT ILIKE',
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regexp: 'REGEXP',
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};
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/*
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* Normalize the filter object and throw errors if invalid values are detected
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* @param {Object} filter The query filter object
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* @options {Object} [options] Optional options to use.
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* @property {Boolean} allowExtendedOperators.
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* @returns {Object} The normalized filter object
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* @private
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*/
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ModelUtils._normalize = function(filter, options) {
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if (!filter) {
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return undefined;
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}
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let err = null;
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if ((typeof filter !== 'object') || Array.isArray(filter)) {
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err = new Error(g.f('The query filter %j is not an {{object}}', filter));
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err.statusCode = 400;
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throw err;
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}
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if (filter.limit || filter.skip || filter.offset) {
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const limit = Number(filter.limit || 100);
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const offset = Number(filter.skip || filter.offset || 0);
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if (isNaN(limit) || limit <= 0 || Math.ceil(limit) !== limit) {
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err = new Error(g.f('The {{limit}} parameter %j is not valid',
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filter.limit));
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err.statusCode = 400;
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throw err;
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}
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if (isNaN(offset) || offset < 0 || Math.ceil(offset) !== offset) {
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err = new Error(g.f('The {{offset/skip}} parameter %j is not valid',
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filter.skip || filter.offset));
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err.statusCode = 400;
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throw err;
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}
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filter.limit = limit;
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filter.offset = offset;
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filter.skip = offset;
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}
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if (filter.order) {
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let order = filter.order;
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if (!Array.isArray(order)) {
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order = [order];
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}
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const fields = [];
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for (let i = 0, m = order.length; i < m; i++) {
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if (typeof order[i] === 'string') {
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// Normalize 'f1 ASC, f2 DESC, f3' to ['f1 ASC', 'f2 DESC', 'f3']
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const tokens = order[i].split(/(?:\s*,\s*)+/);
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for (let t = 0, n = tokens.length; t < n; t++) {
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let token = tokens[t];
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if (token.length === 0) {
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// Skip empty token
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continue;
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}
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const parts = token.split(/\s+/);
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if (parts.length >= 2) {
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const dir = parts[1].toUpperCase();
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if (dir === 'ASC' || dir === 'DESC') {
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token = parts[0] + ' ' + dir;
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} else {
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err = new Error(g.f('The {{order}} %j has invalid direction', token));
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err.statusCode = 400;
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throw err;
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}
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}
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fields.push(token);
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}
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} else {
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err = new Error(g.f('The order %j is not valid', order[i]));
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err.statusCode = 400;
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throw err;
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}
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}
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if (fields.length === 1 && typeof filter.order === 'string') {
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filter.order = fields[0];
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} else {
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filter.order = fields;
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}
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}
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// normalize fields as array of included property names
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if (filter.fields) {
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filter.fields = fieldsToArray(filter.fields,
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Object.keys(this.definition.properties), this.settings.strict);
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}
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filter = this._sanitizeQuery(filter, options);
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this._coerce(filter.where, options);
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return filter;
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};
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function DateType(arg) {
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const d = new Date(arg);
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if (isNaN(d.getTime())) {
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throw new Error(g.f('Invalid date: %s', arg));
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}
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return d;
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}
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function BooleanType(arg) {
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if (typeof arg === 'string') {
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switch (arg) {
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case 'true':
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case '1':
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return true;
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case 'false':
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case '0':
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return false;
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}
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}
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if (arg == null) {
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return null;
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}
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return Boolean(arg);
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}
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function NumberType(val) {
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const num = Number(val);
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return !isNaN(num) ? num : val;
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}
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function coerceArray(val) {
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if (Array.isArray(val)) {
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return val;
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}
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if (!utils.isPlainObject(val)) {
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throw new Error(g.f('Value is not an {{array}} or {{object}} with sequential numeric indices'));
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}
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// It is an object, check if empty
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const props = Object.keys(val);
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if (props.length === 0) {
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throw new Error(g.f('Value is an empty {{object}}'));
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}
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const arrayVal = new Array(props.length);
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for (let i = 0; i < arrayVal.length; ++i) {
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if (!val.hasOwnProperty(i)) {
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throw new Error(g.f('Value is not an {{array}} or {{object}} with sequential numeric indices'));
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}
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arrayVal[i] = val[i];
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}
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return arrayVal;
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}
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function _normalizeAsArray(result) {
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if (typeof result === 'string') {
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result = [result];
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}
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if (Array.isArray(result)) {
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return result;
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} else {
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// See https://github.com/strongloop/loopback-datasource-juggler/issues/1646
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// `ModelBaseClass` normalize the properties to an object such as `{secret: true}`
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const keys = [];
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for (const k in result) {
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if (result[k]) keys.push(k);
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}
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return keys;
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}
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}
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/**
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* Get an array of hidden property names
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*/
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ModelUtils._getHiddenProperties = function() {
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const settings = this.definition.settings || {};
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const result = settings.hiddenProperties || settings.hidden || [];
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return _normalizeAsArray(result);
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};
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/**
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* Get an array of protected property names
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*/
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ModelUtils._getProtectedProperties = function() {
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const settings = this.definition.settings || {};
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const result = settings.protectedProperties || settings.protected || [];
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return _normalizeAsArray(result);
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};
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/**
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* Get the maximum depth of a query object
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*/
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ModelUtils._getMaxDepthOfQuery = function(options, defaultValue) {
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options = options || {};
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// See https://github.com/strongloop/loopback-datasource-juggler/issues/1651
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let maxDepth = this._getSetting('maxDepthOfQuery', options);
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if (maxDepth == null) {
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maxDepth = defaultValue || 32;
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}
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return +maxDepth;
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};
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/**
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* Get the maximum depth of a data object
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*/
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ModelUtils._getMaxDepthOfData = function(options, defaultValue) {
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options = options || {};
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// See https://github.com/strongloop/loopback-datasource-juggler/issues/1651
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let maxDepth = this._getSetting('maxDepthOfData', options);
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if (maxDepth == null) {
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maxDepth = defaultValue || 64;
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}
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return +maxDepth;
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};
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/**
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* Get the prohibitHiddenPropertiesInQuery flag
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*/
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ModelUtils._getProhibitHiddenPropertiesInQuery = function(options, defaultValue) {
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const flag = this._getSetting('prohibitHiddenPropertiesInQuery', options);
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if (flag == null) return !!defaultValue;
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return !!flag;
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};
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/**
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* Sanitize the query object
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*/
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ModelUtils._sanitizeQuery = function(query, options) {
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options = options || {};
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// Get settings to normalize `undefined` values
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const normalizeUndefinedInQuery = this._getSetting('normalizeUndefinedInQuery', options);
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// Get setting to prohibit hidden/protected properties in query
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const prohibitHiddenPropertiesInQuery = this._getProhibitHiddenPropertiesInQuery(options);
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// See https://github.com/strongloop/loopback-datasource-juggler/issues/1651
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const maxDepthOfQuery = this._getMaxDepthOfQuery(options);
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let prohibitedKeys = [];
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// Check violation of keys
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if (prohibitHiddenPropertiesInQuery) {
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prohibitedKeys = this._getHiddenProperties();
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if (options.prohibitProtectedPropertiesInQuery) {
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prohibitedKeys = prohibitedKeys.concat(this._getProtectedProperties());
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}
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}
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return sanitizeQueryOrData(query,
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Object.assign({
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maxDepth: maxDepthOfQuery,
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prohibitedKeys: prohibitedKeys,
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normalizeUndefinedInQuery: normalizeUndefinedInQuery,
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}, options));
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};
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/**
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* Sanitize the data object
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*/
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ModelUtils._sanitizeData = function(data, options) {
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options = options || {};
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return sanitizeQueryOrData(data,
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Object.assign({
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maxDepth: this._getMaxDepthOfData(options),
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}, options));
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};
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/*
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* Coerce values based the property types
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* @param {Object} where The where clause
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* @options {Object} [options] Optional options to use.
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* @property {Boolean} allowExtendedOperators.
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* @returns {Object} The coerced where clause
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* @private
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*/
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ModelUtils._coerce = function(where, options) {
|
2018-12-07 16:13:48 +00:00
|
|
|
const self = this;
|
2018-11-12 21:54:22 +00:00
|
|
|
if (where == null) {
|
|
|
|
return where;
|
|
|
|
}
|
|
|
|
options = options || {};
|
|
|
|
|
2018-12-07 16:13:48 +00:00
|
|
|
let err;
|
2018-11-12 21:54:22 +00:00
|
|
|
if (typeof where !== 'object' || Array.isArray(where)) {
|
|
|
|
err = new Error(g.f('The where clause %j is not an {{object}}', where));
|
|
|
|
err.statusCode = 400;
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
|
2018-12-07 16:13:48 +00:00
|
|
|
const props = self.definition.properties;
|
|
|
|
for (const p in where) {
|
2018-11-12 21:54:22 +00:00
|
|
|
// Handle logical operators
|
|
|
|
if (p === 'and' || p === 'or' || p === 'nor') {
|
2018-12-07 16:13:48 +00:00
|
|
|
let clauses = where[p];
|
2018-11-12 21:54:22 +00:00
|
|
|
try {
|
|
|
|
clauses = coerceArray(clauses);
|
|
|
|
} catch (e) {
|
|
|
|
err = new Error(g.f('The %s operator has invalid clauses %j: %s', p, clauses, e.message));
|
|
|
|
err.statusCode = 400;
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
|
2018-12-07 16:13:48 +00:00
|
|
|
for (let k = 0; k < clauses.length; k++) {
|
2018-11-12 21:54:22 +00:00
|
|
|
self._coerce(clauses[k], options);
|
|
|
|
}
|
|
|
|
|
|
|
|
continue;
|
|
|
|
}
|
2018-12-07 16:13:48 +00:00
|
|
|
let DataType = props[p] && props[p].type;
|
2018-11-12 21:54:22 +00:00
|
|
|
if (!DataType) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (Array.isArray(DataType) || DataType === Array) {
|
|
|
|
DataType = DataType[0];
|
|
|
|
}
|
|
|
|
if (DataType === Date) {
|
|
|
|
DataType = DateType;
|
|
|
|
} else if (DataType === Boolean) {
|
|
|
|
DataType = BooleanType;
|
|
|
|
} else if (DataType === Number) {
|
|
|
|
// This fixes a regression in mongodb connector
|
|
|
|
// For numbers, only convert it produces a valid number
|
|
|
|
// LoopBack by default injects a number id. We should fix it based
|
|
|
|
// on the connector's input, for example, MongoDB should use string
|
|
|
|
// while RDBs typically use number
|
|
|
|
DataType = NumberType;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!DataType) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (DataType.prototype instanceof BaseModel) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (DataType === geo.GeoPoint) {
|
|
|
|
// Skip the GeoPoint as the near operator breaks the assumption that
|
|
|
|
// an operation has only one property
|
|
|
|
// We should probably fix it based on
|
|
|
|
// http://docs.mongodb.org/manual/reference/operator/query/near/
|
|
|
|
// The other option is to make operators start with $
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2018-12-07 16:13:48 +00:00
|
|
|
let val = where[p];
|
2018-11-12 21:54:22 +00:00
|
|
|
if (val === null || val === undefined) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
// Check there is an operator
|
2018-12-07 16:13:48 +00:00
|
|
|
let operator = null;
|
|
|
|
const exp = val;
|
2018-11-12 21:54:22 +00:00
|
|
|
if (val.constructor === Object) {
|
2018-12-07 16:13:48 +00:00
|
|
|
for (const op in operators) {
|
2018-11-12 21:54:22 +00:00
|
|
|
if (op in val) {
|
|
|
|
val = val[op];
|
|
|
|
operator = op;
|
|
|
|
switch (operator) {
|
|
|
|
case 'inq':
|
|
|
|
case 'nin':
|
|
|
|
case 'between':
|
|
|
|
try {
|
|
|
|
val = coerceArray(val);
|
|
|
|
} catch (e) {
|
|
|
|
err = new Error(g.f('The %s property has invalid clause %j: %s', p, where[p], e));
|
|
|
|
err.statusCode = 400;
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (operator === 'between' && val.length !== 2) {
|
|
|
|
err = new Error(g.f(
|
|
|
|
'The %s property has invalid clause %j: Expected precisely 2 values, received %d',
|
|
|
|
p,
|
|
|
|
where[p],
|
|
|
|
val.length
|
|
|
|
));
|
|
|
|
err.statusCode = 400;
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'like':
|
|
|
|
case 'nlike':
|
|
|
|
case 'ilike':
|
|
|
|
case 'nilike':
|
|
|
|
if (!(typeof val === 'string' || val instanceof RegExp)) {
|
|
|
|
err = new Error(g.f(
|
|
|
|
'The %s property has invalid clause %j: Expected a string or RegExp',
|
|
|
|
p,
|
|
|
|
where[p]
|
|
|
|
));
|
|
|
|
err.statusCode = 400;
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'regexp':
|
|
|
|
val = utils.toRegExp(val);
|
|
|
|
if (val instanceof Error) {
|
|
|
|
val.statusCode = 400;
|
|
|
|
throw val;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
try {
|
|
|
|
// Coerce val into an array if it resembles an array-like object
|
|
|
|
val = coerceArray(val);
|
|
|
|
} catch (e) {
|
|
|
|
// NOOP when not coercable into an array.
|
|
|
|
}
|
|
|
|
|
2018-12-07 16:13:48 +00:00
|
|
|
const allowExtendedOperators = self._allowExtendedOperators(options);
|
2018-11-12 21:54:22 +00:00
|
|
|
// Coerce the array items
|
|
|
|
if (Array.isArray(val)) {
|
2018-12-07 16:13:48 +00:00
|
|
|
for (let i = 0; i < val.length; i++) {
|
2018-11-12 21:54:22 +00:00
|
|
|
if (val[i] !== null && val[i] !== undefined) {
|
|
|
|
if (!(val[i] instanceof RegExp)) {
|
|
|
|
val[i] = DataType(val[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (val != null) {
|
|
|
|
if (operator === null && val instanceof RegExp) {
|
|
|
|
// Normalize {name: /A/} to {name: {regexp: /A/}}
|
|
|
|
operator = 'regexp';
|
|
|
|
} else if (operator === 'regexp' && val instanceof RegExp) {
|
|
|
|
// Do not coerce regex literals/objects
|
|
|
|
} else if ((operator === 'like' || operator === 'nlike' ||
|
|
|
|
operator === 'ilike' || operator === 'nilike') && val instanceof RegExp) {
|
|
|
|
// Do not coerce RegExp operator value
|
|
|
|
} else if (allowExtendedOperators && typeof val === 'object') {
|
|
|
|
// Do not coerce object values when extended operators are allowed
|
|
|
|
} else {
|
|
|
|
if (!allowExtendedOperators) {
|
2018-12-07 16:13:48 +00:00
|
|
|
const extendedOperators = Object.keys(val).filter(function(k) {
|
2018-11-12 21:54:22 +00:00
|
|
|
return k[0] === '$';
|
|
|
|
});
|
|
|
|
if (extendedOperators.length) {
|
|
|
|
const msg = g.f('Operators "' + extendedOperators.join(', ') + '" are not allowed in query');
|
|
|
|
const err = new Error(msg);
|
|
|
|
err.code = 'OPERATOR_NOT_ALLOWED_IN_QUERY';
|
|
|
|
err.statusCode = 400;
|
|
|
|
err.details = {
|
|
|
|
operators: extendedOperators,
|
|
|
|
where: where,
|
|
|
|
};
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
val = DataType(val);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Rebuild {property: {operator: value}}
|
|
|
|
if (operator && operator !== 'eq') {
|
2018-12-07 16:13:48 +00:00
|
|
|
const value = {};
|
2018-11-12 21:54:22 +00:00
|
|
|
value[operator] = val;
|
|
|
|
if (exp.options) {
|
|
|
|
// Keep options for operators
|
|
|
|
value.options = exp.options;
|
|
|
|
}
|
|
|
|
val = value;
|
|
|
|
}
|
|
|
|
where[p] = val;
|
|
|
|
}
|
|
|
|
return where;
|
|
|
|
};
|
|
|
|
|