Please consider editing your post and mark it as obsolete instead. Do you want to delete post?
diagram model
Permanently deleted user
Created
diagram models does not have an option to hide a particular model. Example, a user model has relationship with all my models, but this relationship is not required to appear in the diagram.
I've filed two issues: http://www.jetbrains.net/jira/browse/RUBY-3860 for hiding a model and http://www.jetbrains.net/jira/browse/RUBY-3861 for not showing associations