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I am using active admin as given in Active admin install with Rails 4 . gem 'activeadmin', github: 'activeadmin' is installing. But still i am getting error after running rails generate active_admin:install. The error is 

DEPRECATION WARNING: Support for Rails < 4.0.4 will be dropped from Formtastic 4.0. invoke  devise
To use devise you need to specify it in your Gemfile. If you don't want to use devise, run the generator with --skip-users.
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1 Answers1

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It means you did not install devise.

You want to

a) install devise: gem install devise, and then run rails generate active_admin:install. This will create default AdminUser object.

b) use the hint from warning, and install activeadmin with rails generate active_admin:install --skip-users.

Andrey Deineko
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