#461 [mongo-support] Auto-detect filter by field name

Author: mistic100

examples/index.html

@@ -565,7 +565,7 @@ <h3>Output</h3>
   $('.set-mongo').on('click', function() {
     $('#builder').queryBuilder('setRulesFromMongo', {
       "$or": [{
-        "name": {
+        "username": {
           "$regex": "^(?!Mistic)"
         }
       }, {

src/plugins/mongodb-support/plugin.js

@@ -270,15 +270,7 @@ QueryBuilder.extend(/** @lends module:plugins.MongoDbSupport.prototype */ {
 
                     var opVal = mdbrl.call(self, value);
 
-                    /**
-                     * Returns a filter identifier from the MongoDB field
-                     * @event changer:getMongoDBFieldID
-                     * @memberof module:plugins.MongoDbSupport
-                     * @param {string} field
-                     * @param {*} value
-                     * @returns {string}
-                     */
-                    var id = self.change('getMongoDBFieldID', field, value);
+                    var id = self.getMongoDBFieldID(field, value);
 
                     /**
                      * Modifies the rule generated from the MongoDB expression
@@ -320,6 +312,39 @@ QueryBuilder.extend(/** @lends module:plugins.MongoDbSupport.prototype */ {
      */
     setRulesFromMongo: function(query) {
         this.setRules(this.getRulesFromMongo(query));
+    },
+
+    /**
+     * Returns a filter identifier from the MongoDB field.
+     * Automatically use the only one filter with a matching field, fires a changer otherwise.
+     * @param {string} field
+     * @param {*} value
+     * @fires module:plugins.MongoDbSupport:changer:getMongoDBFieldID
+     * @returns {string}
+     * @private
+     */
+    getMongoDBFieldID: function(field, value) {
+        var matchingFilters = this.filters.filter(function(filter) {
+            return filter.field === field;
+        });
+
+        var id;
+        if (matchingFilters.length === 1) {
+            id = matchingFilters[0].id;
+        }
+        else {
+            /**
+             * Returns a filter identifier from the MongoDB field
+             * @event changer:getMongoDBFieldID
+             * @memberof module:plugins.MongoDbSupport
+             * @param {string} field
+             * @param {*} value
+             * @returns {string}
+             */
+            id = this.change('getMongoDBFieldID', field, value);
+        }
+
+        return id;
     }
 });
 

tests/plugins.mongo-support.module.js

@@ -62,6 +62,48 @@ $(function(){
         );
     });
 
+    QUnit.test('Automatically use filter from field', function(assert) {
+        var rules = {
+            condition: 'AND',
+            rules: [
+                {
+                    id: 'name',
+                    operator: 'equal',
+                    value: 'Mistic'
+                }
+            ]
+        };
+
+        var mongo = {
+            $and: [{
+                username: 'Mistic'
+            }]
+        };
+
+        $b.queryBuilder({
+            filters: [
+                {
+                    id: 'name',
+                    field: 'username',
+                    type: 'string'
+                },
+                {
+                    id: 'last_days',
+                    field: 'display_date',
+                    type: 'integer'
+                }
+            ]
+        });
+
+        $b.queryBuilder('setRulesFromMongo', mongo);
+
+        assert.rulesMatch(
+            $b.queryBuilder('getRules'),
+            rules,
+            'Should use "name" filter from "username" field'
+        );
+    });
+
 
     var all_operators_rules = {
         condition: 'AND',