The example seed file suggested fails under Rails 4 RC1 with the following error and a stack trace: > Could not find table 'name' I converted: ``` Role.find_or_create_by_name({ :name => role }, :without_protection => true) ``` to: ``` Role.where(:name => role).first_or_create(:without_protection => true) ``` Now it seems to work great. **Note that I did switch from find_or_create to first_or_create, which seemed more explicit for this context.**