ActiveScaffold is complaining about a Malformed Constraint. What should I check?
If you are noticing this when trying to open a nested scaffold, the first thing to check is that you have your associations set up in both directions. For instance, if a UserGroup has_many Users, then make sure that a User belongs_to a UserGroup. If that doesn’t fix your problem then take another look at your associations – is there a clear “reverse” association?