undefined method `database_authenticatable' for #

Question

I am using Active Admin gem for my small application based on Quiz. But when I execute rake db:migrate it gives me error. Following is the trace of the comm

Answer 1

I also ran into this issue on my existing app as I tried to deploy to a new staging server.

Ended up being that the Devise gem had been updated to 2.1 and I hadn't fixed the migration to work correctly with the new version.

Be sure to read through their migration to 2.1 doc on their wiki -- https://github.com/plataformatec/devise/wiki/How-To:-Upgrade-to-Devise-2.1

Also, be sure to read through the doc for how to correctly adjust existing migrations -- https://github.com/plataformatec/devise/wiki/How-To:-Upgrade-to-Devise-2.0-migration-schema-style