rails g active_admin：安装错误

Question

I have problem with ActiveAdmin. I've added the gem 'activeadmin' to my Gemfile and ran

$ bundle install

which worked. But when I try to:

$ rails g active_admin:install

I get:

/home/dominika/active_admin/config/application.rb:10:in `<module:ActiveAdmin>': superclass mismatch for class Application (TypeError)
from /home/dominika/active_admin/config/application.rb:9:in `<top (required)>'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:82:in `require'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:82:in `preload'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:143:in `serve'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:131:in `block in run'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:125:in `loop'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application.rb:125:in `run'
from /home/dominika/.rvm/gems/ruby-2.2.0/gems/spring-1.2.0/lib/spring/application/boot.rb:18:in `<top (required)>'
from /home/dominika/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/dominika/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from -e:1:in `<main>'

Maybe it's really stupid, but I really don't know how to fix it. Please, help...

Answer 1

This happens because your application is called active_admin . Rename it, and everything will work.

To rename the app view this thread to get the instructions.

Answer 2

Overall it sounds like you are pretty much doing things correctly.

I've added the gem 'active_admin'

From the documentation it's:

# Gemfile

gem 'activeadmin' 

Does that help?