4189: Look up owner's writable_by when API did not provide writable_by for the object...

diff --git a/apps/workbench/app/models/arvados_base.rb b/apps/workbench/app/models/arvados_base.rb
index e0e93b9e2d0828cef0149f95fe51c817260ef3c7..31a5b58d2545af03b2043a3c7601a9fe131ac1a6 100644 (file)
--- a/apps/workbench/app/models/arvados_base.rb
+++ b/apps/workbench/app/models/arvados_base.rb
@@ -329,7 +329,9 @@ class ArvadosBase < ActiveRecord::Base
      (current_user.is_admin or
       current_user.uuid == self.owner_uuid or
       new_record? or
-      (writable_by.include? current_user.uuid rescue false))) or false
+      (respond_to?(:writable_by) ?
+       writable_by.include?(current_user.uuid) :
+       (ArvadosBase.find(owner_uuid).writable_by.include? current_user.uuid rescue false)))) or false
   end
 
   def attribute_editable?(attr, ever=nil)