I created a blog by following the Getting Started with Rails precisely. And then I following the tutorial here to try ActiveAdmin: http://activeadmin.info/documentation.html.
It’s working fine for the Post and Tag models (I logged in and created/add/edited stuff) but not the Comment model.
rails generate active_admin:resource Comment
create app/admin/comments.rb
Then when I try to start the server I get this:
rails server=> Booting WEBrick
=> Rails 3.0.7 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server Exiting /usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin/namespace.rb:116:in
`find_or_build_resource': Tried to
register Comment as Comment but
already registered to Comment
(ActiveAdmin::ResourceMismatchError)
from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin/namespace.rb:45:in
`register' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:141:in
`register' from
/Users/myusername/Projects/RoR/blog/app/admin/comments.rb:1:in
`<top (required)>' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`load' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`block in load' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`block in load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:596:in
`new_constants_in' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`load' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:185:in
`block in load!' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:185:in
`each' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:185:in
`load!' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:212:in
`routes' from
/Users/myusername/Projects/RoR/blog/config/routes.rb:2:in
`block in <top (required)>' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/routing/route_set.rb:233:in
`instance_exec' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/routing/route_set.rb:233:in
`draw' from
/Users/myusername/Projects/RoR/blog/config/routes.rb:1:in
`<top (required)>' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`load' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`block in load' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`block in load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:596:in
`new_constants_in' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in
`load' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:127:in `block in reload_routes!' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:127:in `each' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:127:in `reload_routes!' from
/usr/local/lib/ruby/gems/1.9.1/gems/activeadmin-0.2.2/lib/active_admin.rb:123:in
`block in setup' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/callbacks.rb:420:in
`_run_prepare_callbacks' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/callbacks.rb:40:in
`initialize' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:33:in
`new' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:33:in
`build' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:79:in
`block in build' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:79:in
`each' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:79:in
`inject' from
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/stack.rb:79:in
`build' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:162:in `app' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application/finisher.rb:35:in
`block in <module:Finisher>' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `block in run_initializers' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:77:in
`method_missing' from
/Users/myusername/Projects/RoR/blog/config/environment.rb:5:in
`<top (required)>' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in
`require' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in
`block in require' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`block in load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:596:in
`new_constants_in' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:225:in
`load_dependency' from
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in
`require' from
/Users/myusername/Projects/RoR/blog/config.ru:3:in
`block in <main>' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/builder.rb:46:in
`instance_eval' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/builder.rb:46:in
`initialize' from
/Users/myusername/Projects/RoR/blog/config.ru:1:in
`new' from
/Users/myusername/Projects/RoR/blog/config.ru:1:in
`<main>' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/builder.rb:35:in
`eval' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/builder.rb:35:in
`parse_file' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/server.rb:162:in
`app' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/server.rb:248:in
`wrapped_app' from
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/server.rb:213:in
`start' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:30:in
`block in <top (required)>' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in
`tap' from
/usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in
`<top (required)>' from
script/rails:6:in `require' from
script/rails:6:in `<main>'
Your help would be appreciated.
Look like a bug (ActiveAdmin has it’s own built-in
Commentmodel/class already): https://github.com/gregbell/active_admin/issues/64A possible workaround could be to give your
Commentmodel a different name within inapp/admin/comments.rb: