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ActiveAdmin Comment model not working properly
原标题：

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.

最佳回答

Look like a bug (ActiveAdmin has it s own built-in Comment model/class already): https://github.com/gregbell/active_admin/issues/64

A possible workaround could be to give your Comment model a different name within in app/admin/comments.rb:

ActiveAdmin.register Comment, :as => "PostComment" do
时间：2011-06-06 13:36:40
问题回答

try this

run in terminal

rails g active_admin:resource ActiveAdmin::Comment

add a following lines in app/admin/active_admin_comment.rb

ActiveAdmin.register ActiveAdmin::Comment, :as => "Comment" do
end

after that edit config/initializers/active_admin

[...]
  config.comments_registration_name = "OldComment"
  config.show_comments_in_menu = false
[...]

And now you have opportunity to customize a comments in app/admin/active_admin_comment.rb but i still didn t find solution to add :update and :destroy actions

时间：2014-05-23 12:22:37

I had the same problem with version 1.0.0.pre, but thankfully, you can suppress ActiveAdmin comments altogether with a config in active_admin.rb then you don t have to alias your own Comment model anymore as mentioned above.

config/initializers/active_admin.rb

  ...
  # == Admin Comments
  #
  # This allows your users to comment on any resource registered with Active Admin.
  #
  # You can completely disable comments:
  config.allow_comments = false
  #

It s also listed in the docs: https://github.com/gregbell/active_admin/blob/master/docs/1-general-configuration.md#comments

时间：2014-06-23 18:17:42

Dylan s answer is a great start. In addition to his, I needed to overwrite the controller resource/collection methods.

app/admin/comments.rb

ActiveAdmin.register Comment, as:  QuestionComment  do
   controller do
     defaults resource_class: Comment, collection_name:  comments , instance_name:  comment 
   end
end

Basically, you re just overwriting the defaults of inherited resource controller (https://github.com/josevalim/inherited_resources#overwriting-defaults)

(yes, this is still an issue in 2014 even in the 1.0.0 prerelease version, but it appears that they want to fix it from reading the github issues)

时间：2014-03-06 21:45:17


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