Fix work package save spec

frontend/app/components/api/api-v3/hal-resources/hal-resource.service.ts

@@ -93,19 +93,7 @@ function halResource($q, _, lazy, halTransform, HalLink) {
     }
 
     public $plain() {
-      let element:any = angular.copy(this);
-      let linked:string[] = Object.keys(this.$links);
-      element._links = {};
-
-      linked.forEach(linkName => {
-        if (this[linkName] && element[linkName].$links && !angular.isFunction(this[linkName])) {
-          element._links[linkName] = element[linkName].$links.self.$link;
-        }
-
-        delete element[linkName];
-      });
-
-      return element;
+      return angular.copy(this.$source);
     }
 
     private proxyProperties() {

frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts

@@ -66,23 +66,23 @@ function wpResource(HalResource:typeof op.HalResource, NotificationsService:any,
       this.getForm()
         .catch(deferred.reject)
         .then(form => {
-          var plain_payload = form.payload.$source;
+          var plainPayload = form.payload.$plain();
           var schema = form.$embedded.schema;
 
           angular.forEach(plain, (value, key) => {
             if (typeof(schema[key]) === 'object' && schema[key]['writable'] === true) {
-              plain_payload[key] = value;
+              plainPayload[key] = value;
             }
           });
 
-          angular.forEach(plain_payload._links, (_value, key) => {
+          angular.forEach(plainPayload._links, (_value, key) => {
             if (this[key] && typeof(schema[key]) === 'object' && schema[key]['writable'] === true) {
               var value = this[key].href === 'null' ? null : this[key].href;
-              plain_payload._links[key] = {href: value};
+              plainPayload._links[key] = {href: value};
             }
           });
 
-          return this.$links.updateImmediately(plain_payload)
+          return this.$links.updateImmediately(plainPayload)
             .then(workPackage => {
               angular.extend(this, workPackage);