Add toJSON support.

Author: Leblantoine

lib/api/services/JsonApiService.js

@@ -173,8 +173,37 @@ module.exports = {
     return data;
   },
 
+
+  /*
+   * Call toJSON recursively for all objects in data
+   *
+   * @param {Object|array} input data
+   * @return {Object|array} data with toJSON called for every included objects
+   */
+  _toJSON: function(data) {
+    // Empty data
+    if (_.isEmpty(data)) {
+      // Return [] or null
+      return _.isArray(data) ? data : null;
+    }
+
+    // Array data
+    if (_.isArray(data)) {
+      return data.map(obj => this._toJSON(obj));
+    }
+
+    // Single data
+    if (typeof data.toJSON === 'function') {
+      return data.toJSON();
+    }
+
+    return data;
+  },
+
   serialize: function(modelName, data) {
 
+    data = this._toJSON(data);
+
     var returnedValue = null;
     if ((_.isArray(data) && depthOf(data) > 2) || (_.isObjectLike(data) && _.isArray(data) === false && depthOf(data) > 1)) {
       returnedValue = Serializer.serialize(modelName, data);