ActiveAdmin 评论模型无法正常工作

Question

我按照Rails 入门创建了一个博客。然后我按照此处的教程尝试 ActiveAdmin： http://activeadmin.info/documentation.html 。

它适用于帖子和标签模型（我登录并创建/添加/编辑内容），但不适用于评论模型。

rails generate active_admin:resource Comment

create  app/admin/comments.rb

然后，当我尝试启动服务器时，我得到：

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>'

您的帮助将不胜感激。

Answer 1

看起来像一个错误（ActiveAdmin 已经有自己的内置 Comment 模型/类）：https: //github.com/gregbell/active_admin/issues/64

可能的解决方法是在 app/admin/comments.rb< 中为您的 Comment 模型指定不同的名称/代码>：

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

Answer 2

尝试

在终端中运行，

rails g active_admin:resource ActiveAdmin::Comment

---

添加以下行
app/admin/active_admin_comment.rb

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

---

编辑config/initializers/active_admin之后

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

，现在您有机会在应用程序中自定义评论 /admin/active_admin_comment.rb
但我仍然没有找到添加 :update 和 :destroy 操作的解决方案

Answer 3

迪伦的回答是一个很好的开始。除了他的之外，我还需要覆盖控制器资源/集合方法。

app/admin/comments.rb

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

基本上，您只是覆盖继承资源控制器的默认值（https://github.com/josevalim/inherited_resources#overwriting-defaults）

（是的，即使在 2014 年，这仍然是一个问题1.0.0 预发布版本，但似乎他们想通过阅读 github issues 来修复它）

Answer 4

我在版本 1.0.0.pre 中遇到了同样的问题，但幸运的是，您可以使用 active_admin.rb 中的配置完全抑制 ActiveAdmin 评论，然后您不必再像上面提到的那样为自己的 Comment 模型添加别名。

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
  #

它也在文档中列出： https://github.com/gregbell/active_admin/blob/master/docs/1-general-configuration.md#comments