diff --git a/app/assets/javascripts/sitewide/image_editor.js b/app/assets/javascripts/sitewide/image_editor.js
index 209b73844..2e0b8d477 100644
--- a/app/assets/javascripts/sitewide/image_editor.js
+++ b/app/assets/javascripts/sitewide/image_editor.js
@@ -407,7 +407,7 @@ var ImageEditorModal = (function() {
           'mime-type': editButton.data('image-mime-type')
         };
         $('#filePreviewModal').modal('hide');
-        $.post(editButton.data('start-edit-url'));
+        $.post(editButton.data('image-start-edit-url'));
         initImageEditor(data, fileUrl);
       });
     });
diff --git a/app/permissions/asset.rb b/app/permissions/asset.rb
index 6cea35793..482c56a8a 100644
--- a/app/permissions/asset.rb
+++ b/app/permissions/asset.rb
@@ -2,31 +2,31 @@
 
 Canaid::Permissions.register_for(Asset) do
   can :read_asset do |user, asset|
-    object ||= asset.step
-    object ||= asset.result
-    object ||= asset.repository_cell
+    object = asset.step || asset.result || asset.repository_cell
 
-    if object.class == Step
+    case object
+    when Step
       protocol = object.protocol
       can_read_protocol_in_module?(user, protocol) || can_read_protocol_in_repository?(user, protocol)
-    elsif object.class == Result
+    when Result
       can_read_experiment?(user, object.my_module.experiment)
-    elsif object.class == RepositoryCell
+    when RepositoryCell
       can_read_repository?(user, object.repository_column.repository)
     end
   end
 
   can :manage_asset do |user, asset|
-    object ||= asset.step
-    object ||= asset.result
-    object ||= asset.repository_cell
+    object = asset.step || asset.result || asset.repository_cell
 
-    if object.class == Step
+    case object
+    when Step
       protocol = object.protocol
       can_manage_protocol_in_module?(user, protocol) || can_manage_protocol_in_repository?(user, protocol)
-    elsif object.class == Result
+    when Result
       can_manage_experiment?(user, object.my_module.experiment)
-    elsif object.class == RepositoryCell && !object.repository_column.repository.is_a?(RepositorySnapshot)
+    when RepositoryCell
+      return false if object.repository_column.repository.is_a?(RepositorySnapshot)
+
       can_manage_repository?(user, object.repository_column.repository)
     end
   end