I am using factory_girl to generate users and database_cleaner to clean up the database after tests, but I have validation errors: uniqueness. Here is my spec_helper, custom model and other files that are affected.
https://gist.github.com/2006719
It looks like the User is not dynamically generated every time the page is created. Try changing line 12 in factories to:
f.user_id { Factory(:user).id }
or even
f.user { Factory :user }
Hope this helps.