diff --git a/app/assets/javascripts/admin/commons/content_editor.js b/app/assets/javascripts/admin/commons/content_editor.js
index 685e43f4bc06ca137778728fd1860472cf48f85b..45ca3d68af63de26957c2905ac000c39ad8e29bf 100644
--- a/app/assets/javascripts/admin/commons/content_editor.js
+++ b/app/assets/javascripts/admin/commons/content_editor.js
@@ -5,12 +5,12 @@ window.osuny.contentEditor = {
     init: function () {
         'use strict';
         this.container = document.querySelector('.js-content-editor');
-        this.sortHeadingsUrl = this.container.getAttribute('data-sort-headings-url');
-        this.sortBlocksUrl = this.container.getAttribute('data-sort-blocks-url');
         if (this.container === null) {
             return;
         }
-
+        this.sortHeadingsUrl = this.container.getAttribute('data-sort-headings-url');
+        this.sortBlocksUrl = this.container.getAttribute('data-sort-blocks-url');
+        
         this.initElements();
         this.initSortable();
     },