Ticket #44745: 44745.diff

src/js/_enqueues/wp/api.js

@@ -1412 +1412 @@
                                                 // Function that returns a constructed url passed on the parent.
                                                 url: function() {
                                                         return routeModel.get( 'apiRoot' ) + routeModel.get( 'versionString' ) +
-                                                                        parentName + '/' + this.parent + '/' +
-                                                                        routeName;
-                                                },
+                                                                parentName + '/' +
+                                                                ( ( _.isUndefined( this.parent ) || '' === this.parent ) ?
+                                                                        ( _.isUndefined( this.get( 'parent_post' ) ) ? '' : this.get( 'parent_post' ) + '/' ) :
+                                                                        this.parent + '/' ) +
+                                                          routeName;
+                                                  },
 
                                                 // Specify the model that this collection contains.
                                                 model: function( attrs, options ) {