Only restangularized object get stripped

Fixes #420

Author: mgonto

README.md

@@ -577,6 +577,7 @@ These are the methods that can be called on the Restangular object.
 * **trace: ([queryParams, headers])**: Does a TRACE
 * **options: ([queryParams, headers])**: Does a OPTIONS
 * **patch(object, [queryParams, headers])**: Does a PATCH
+* **remove([queryParams, headers])**: Does a DELETE
 * **putElement(idx, params, headers)**: Puts the element on the required index and returns a promise of the updated new array
 * **getRestangularUrl()**: Gets the URL of the current object.
 * **getRequestedUrl()**: Gets the real URL the current object was requested with (incl. GET parameters). Will equal getRestangularUrl() when no parameters were used, before calling `getList()`, or when using on a nested child.

src/restangular.js

@@ -181,6 +181,10 @@ module.provider('Restangular', function() {
                 return this;
             };
 
+            config.isRestangularized = function(obj) {
+              return !!obj.one || !!obj.all;
+            }
+
             config.setFieldToElem = function(field, elem, value) {
               var properties = field.split('.');
               var idValue = elem;
@@ -982,7 +986,8 @@ module.provider('Restangular', function() {
 
                   var callObj = obj || this;
                   var etag = callObj[config.restangularFields.etag];
-                  if (_.isObject(callObj)) {
+
+                  if (_.isObject(callObj) && config.isRestangularized(callObj)) {
                       callObj = stripRestangular(callObj);
                   }
                   var request = config.fullRequestInterceptor(callObj, operation, route, fetchUrl,