Activeadmin: How to overwrite index collection or show/hide records?

[releu]

I have AdminUser and Post.

Post belongs_to AdminUser

In the index action I should show only author posts (Post.where(:admin_user_id => current_admin_user.id)).

How I can do it?

Thanks.

[sachin87]

write this in your admin/posts.rb

controller do
def index
@posts = current_admin_user.posts
end
end
to override the index action.

[releu]

I've got error:
undefined methodbase' for nil:NilClass`

I find :scope_to method. It should help me.

[releu]

The :scope_to works fine. But error on overwriting index action still real.

Bug:

controller do
  def index
    @posts = current_admin_user.posts
  end
end

get 'admin/posts'
# => undefined method `base' for nil:NilClass

[jonlhouse]

I'm having similar issues. I have a tree-based model (using Ancestry gem). I'd like my :index action to show all top level records and have the ability to "click-through" to get to the children records. I do have CanCan setup but have no special "CanCan" code in the controller.

I'd like to be able to scope my collection with
@icd9s = Icd9.where(:ancestry => params[:parent_id])

I've tried the following:
controller do
def index
@icd9s = Icd9.where(:ancestry => params[:parent_id]).page(params[:page]).per(10)
end
end

This results in a "undefined method `base' for nil:NilClass" exception which I don't know is due to CanCan, Kaminari or ActiveAdmin. Note, I've tried the above with constants in place of the params[] lookups with no luck.

I've also tried to override the InheritedResources collection method like so:
controller do
def collection
@icd9s ||= Icd9.where(:ancestry => nil).page(1).per(10)
end
end

This results in the same: "undefined methodbase' for nil:NilClass"`

Any advice is appreciated, Thanks.

[sachin87]

please give some details of Backtrace, if u can.

which version of ruby u r using?

[releu]

ruby: ree-1.8.7-2011.03

controller do
  def index
    @posts = Post.all
  end
end

undefined methodnum_pages' for #`

controller do
  def index
    @posts = current_user.posts.page(1).per(2)
  end
end

undefined methodbase' for nil:NilClass`

Extracted source render renderer_for(:index)

Full trace:

activesupport (3.1.1) lib/active_support/whiny_nil.rb:48:in `method_missing'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:177:in `column_for'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:145:in `default_filter_type'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:42:in `filter'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:19:in `active_admin_filters_form_for'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:16:in `each'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:16:in `active_admin_filters_form_for'
actionpack (3.1.1) lib/action_view/helpers/capture_helper.rb:40:in `capture'
actionpack (3.1.1) lib/action_view/helpers/capture_helper.rb:187:in `with_output_buffer'
actionpack (3.1.1) lib/action_view/helpers/capture_helper.rb:40:in `capture'
actionpack (3.1.1) lib/action_view/helpers/form_helper.rb:590:in `fields_for'
actionpack (3.1.1) lib/action_view/helpers/form_helper.rb:373:in `form_for'
activeadmin (0.3.2) lib/active_admin/view_helpers/filter_form_helper.rb:15:in `active_admin_filters_form_for'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:45:in `send'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:45:in `method_missing'
activeadmin (0.3.2) lib/active_admin/resource/sidebars.rb:29:in `add_default_sidebar_sections'
activeadmin (0.3.2) lib/active_admin/views/components/sidebar_section.rb:19:in `instance_eval'
activeadmin (0.3.2) lib/active_admin/views/components/sidebar_section.rb:19:in `build_sidebar_content'
activeadmin (0.3.2) lib/active_admin/views/components/sidebar_section.rb:12:in `build'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:63:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:77:in `insert_tag'
activeadmin (0.3.2) lib/active_admin/arbre/html/element.rb:13:in `sidebar_section'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:148:in `build_sidebar'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:147:in `collect'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:147:in `build_sidebar'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:68:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:96:in `with_current_dom_context'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:67:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:77:in `insert_tag'
activeadmin (0.3.2) lib/active_admin/arbre/html/element.rb:13:in `div'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:146:in `build_sidebar'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:99:in `build_page_content'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:68:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:96:in `with_current_dom_context'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:67:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:77:in `insert_tag'
activeadmin (0.3.2) lib/active_admin/arbre/html/element.rb:13:in `div'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:97:in `build_page_content'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:41:in `build_page'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:68:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:96:in `with_current_dom_context'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:67:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:77:in `insert_tag'
activeadmin (0.3.2) lib/active_admin/arbre/html/element.rb:13:in `div'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:38:in `build_page'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:96:in `within'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:37:in `build_page'
activeadmin (0.3.2) lib/active_admin/views/pages/base.rb:10:in `build'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:63:in `build_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:77:in `insert_tag'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:41:in `send'
activeadmin (0.3.2) lib/active_admin/arbre/builder.rb:41:in `method_missing'
activeadmin (0.3.2) lib/active_admin/view_helpers/renderer_helper.rb:21:in `render'
activeadmin (0.3.2) app/views/active_admin/resource/index.html.arb:1:in `___sers_releu__rvm_gems_ree_______________mtv_blog_gems_activeadmin_______app_views_active_admin_resource_index_html_arb___2081107852_2259082560'
actionpack (3.1.1) lib/action_view/template.rb:144:in `send'
actionpack (3.1.1) lib/action_view/template.rb:144:in `render'
activesupport (3.1.1) lib/active_support/notifications.rb:55:in `instrument'
actionpack (3.1.1) lib/action_view/template.rb:142:in `render'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:40:in `render_template'
actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:33:in `instrument'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
activesupport (3.1.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:33:in `instrument'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:39:in `render_template'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:47:in `render_with_layout'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:38:in `render_template'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:12:in `render'
actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:22:in `wrap_formats'
actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:9:in `render'
actionpack (3.1.1) lib/action_view/renderer/renderer.rb:36:in `render_template'
actionpack (3.1.1) lib/action_view/renderer/renderer.rb:17:in `render'
actionpack (3.1.1) lib/abstract_controller/rendering.rb:120:in `_render_template'
actionpack (3.1.1) lib/action_controller/metal/streaming.rb:250:in `_render_template'
actionpack (3.1.1) lib/abstract_controller/rendering.rb:114:in `render_to_body'
actionpack (3.1.1) lib/action_controller/metal/renderers.rb:30:in `render_to_body'
actionpack (3.1.1) lib/action_controller/metal/compatibility.rb:43:in `render_to_body'
actionpack (3.1.1) lib/abstract_controller/rendering.rb:99:in `render'
actionpack (3.1.1) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:40:in `render'
activesupport (3.1.1) lib/active_support/core_ext/benchmark.rb:5:in `ms'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/benchmark.rb:308:in `realtime'
activesupport (3.1.1) lib/active_support/core_ext/benchmark.rb:5:in `ms'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:40:in `render'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:78:in `cleanup_view_runtime'
activerecord (3.1.1) lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:39:in `render'
actionpack (3.1.1) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
actionpack (3.1.1) lib/action_controller/metal/implicit_render.rb:5:in `send_action'
actionpack (3.1.1) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.1.1) lib/abstract_controller/callbacks.rb:18:in `process_action'
activesupport (3.1.1) lib/active_support/callbacks.rb:461:in `_run__101774640__process_action__199225275__callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:386:in `send'
activesupport (3.1.1) lib/active_support/callbacks.rb:386:in `_run_process_action_callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `send'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.1) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/rescue.rb:17:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
activesupport (3.1.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/params_wrapper.rb:201:in `process_action'
activerecord (3.1.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.1.1) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.1.1) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.1.1) lib/action_controller/metal.rb:193:in `dispatch'
actionpack (3.1.1) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.1.1) lib/action_controller/metal.rb:236:in `action'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:65:in `call'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:65:in `dispatch'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:29:in `call'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:152:in `call'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:96:in `recognize'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:82:in `optimized_each'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:95:in `recognize'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:141:in `call'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:532:in `call'
sass (3.1.10) lib/sass/./sass/plugin/rack.rb:54:in `call'
warden (1.0.6) lib/warden/manager.rb:35:in `call'
warden (1.0.6) lib/warden/manager.rb:34:in `catch'
warden (1.0.6) lib/warden/manager.rb:34:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.3.5) lib/rack/etag.rb:23:in `call'
rack (1.3.5) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/flash.rb:243:in `call'
rack (1.3.5) lib/rack/session/abstract/id.rb:195:in `context'
rack (1.3.5) lib/rack/session/abstract/id.rb:190:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/cookies.rb:331:in `call'
activerecord (3.1.1) lib/active_record/query_cache.rb:62:in `call'
activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `call'
activesupport (3.1.1) lib/active_support/callbacks.rb:392:in `_run_call_callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `send'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/reloader.rb:68:in `call'
rack (1.3.5) lib/rack/sendfile.rb:101:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.1.1) lib/rails/rack/logger.rb:13:in `call'
rack (1.3.5) lib/rack/methodoverride.rb:24:in `call'
rack (1.3.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.1.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.3.5) lib/rack/lock.rb:15:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/static.rb:53:in `call'
railties (3.1.1) lib/rails/engine.rb:456:in `call'
railties (3.1.1) lib/rails/rack/content_length.rb:16:in `call'
railties (3.1.1) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:162:in `start'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:95:in `start'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:92:in `each'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:92:in `start'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:23:in `start'
/Users/releu/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:82:in `start'
rack (1.3.5) lib/rack/handler/webrick.rb:13:in `run'
rack (1.3.5) lib/rack/server.rb:265:in `start'
railties (3.1.1) lib/rails/commands/server.rb:70:in `start'
railties (3.1.1) lib/rails/commands.rb:54
railties (3.1.1) lib/rails/commands.rb:49:in `tap'
railties (3.1.1) lib/rails/commands.rb:49
script/rails:6:in `require'
script/rails:6

[mattvague]

I'm guessing this is a bug report?

[sachin87]

it's related to metasearch, i peeped into the code(activeadmin gem) but did not find any solution to that.

[crystalneth]

Definitely a bug - seems there is no way to override the default collection. There should really be a way that does not involved opening the controller.

Something like:

base_collection { Foo.where(:not_broken => true) }

[simonoff]

+1 to @allix
Just now it works only for relationship. But if I need ovveride default collection - then nothing :(

[ericcong]

+1, This bug really drives me crazy

[sachin87]

controller do
def index
@posts = Post.where(:enabled => true).page(params[:page])
respond_to do |format|
format.html{ use your html template now (eg. render "active_admin/discharged_patients/index"}
format.csv{ use your csv template now"}
format.xml{ use your xml template now}
end
end
end

this is how u can solved this problem, it means, if u don't specify "page(params[:page])" , it will yield error
undefined method `num_pages' for #ActiveRecord::Relation:0x10d65e560.

now if u don't override the html template it will yield error
undefined method `base' for nil:NilClass
so create ur own index template also,
eg. in ur views/active_admin/controller_name/index.html.erb

if u are overriding the index action u have to use ur own template, but after this u will loose active_admin layout.

[hoysoft]

Feel this is a very serious bug, hoping to solve the

[eugene]

This bug is due to active_admin's FormBuilder expecting an instance variable called "search". It is normally added by ActiveAdmin's Resource controller. My workaround follows:

ActiveAdmin.register District do
  collection_action :index, :method => :get do
      scope = District.scoped

      @collection = scope.page() if params[:q].blank?
      @search = scope.metasearch(clean_search_params(params[:q]))

      respond_to do |format|
        format.html {
          render "my/own/template" # or "active_admin/resource/index"
        }
      end
    end
end

[hoysoft]

very good,thank eugene

[nathanpsouza]

Thank you eugene

[treydock]

eugene, where would a custom filter go in your example? I have Users who have a HABTM relationship with Organizations. My Ballot resource belongs to an Organization so I want only users to see ballots in their ogranization...

This generates the right SQL in the logs, but unsure where to place in the collection_action

Ballot.find(:all, :conditions => ["organization_id IN (?)", current_user_organizations])

app/controllers/application_controller.rb

  def current_user_organizations
    current_user.organizations.find(:all)
  end 

The collection_action seems the only way to make this work

    def index
      index! do |format|
        collection = Ballot.find(:all, :conditions => ["organization_id IN (?)", current_user_organizations])

        format.html {
          render "active_admin/resource/index"
        }   
      end 
    end 

Using only the above index override , the correct SQL is called but is then is overridden by the active_admin collection call

  User Load (0.1ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 3 LIMIT 1
  Organization Load (0.1ms)  SELECT `organizations`.* FROM `organizations` INNER JOIN `organizations_users` ON `organizations`.`id` = `organizations_users`.`organization_id` WHERE `organizations_users`.`user_id` = 3
  Ballot Load (0.2ms)  SELECT `ballots`.* FROM `ballots` WHERE (organization_id IN (1))
   (0.2ms)  SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM `ballots` LIMIT 30 OFFSET 0) subquery_for_count 
   (0.6ms)  SELECT COUNT(*) FROM `ballots` 
  CACHE (0.0ms)  SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM `ballots` LIMIT 30 OFFSET 0) subquery_for_count 
  CACHE (0.0ms)  SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM `ballots` LIMIT 30 OFFSET 0) subquery_for_count 
  Ballot Load (0.8ms)  SELECT `ballots`.* FROM `ballots` ORDER BY `ballots`.id desc LIMIT 30 OFFSET 0

Thanks

[treydock]

Resolved my previous issue with the following...

  collection_action :index, :method => :get do
    scope = Ballot.where(:organization_id => current_user_organizations).scoped

    @collection = scope.page() if params[:q].blank?
    @search = scope.metasearch(clean_search_params(params[:q]))

    respond_to do |format|
      format.html {
        render "active_admin/resource/index"
      }   
    end 
  end 

It's working great and prevents the filters from showing the items during a search, thanks eugene

[ajoulie]

To override the default collection and eager load association, you can either :

• use scope_to

  scope_to :association_method => :scoped do

   User.includes(:role)

  end

  

• override action scoped_collection in the controller, allow to

  controller do

    def scoped_collection

       User.includes(:role)

    end

  end

  

[mpautasso]

Thank you eugene.
It works for me.

[lucj]

For my "Group" model, the collection approach works well but for the "Item" model, it does not work and return the following error:

undefined method `page' for #<Array:0xc240bc4>

I use this code in admin/items.rb: => does not work

collection_action :index, :method => :get do
  # Only get the items belonging to a group owned by the current user
  scope = Group.where("owner_id = ?", current_user.id).map{|group| group.items}

  @collection = scope.page() if params[:q].blank?
  @search = scope.metasearch(clean_search_params(params[:q]))

   respond_to do |format|
   format.html {
     render "active_admin/resource/index"
   }
 end
end

In admin/groups.rb, the following works fine though:

collection_action :index, :method => :get do
  # Only get the groups owned by the current user
  scope = Group.where("owner_id = ?", current_user.id).scoped

  @collection = scope.page() if params[:q].blank?
  @search = scope.metasearch(clean_search_params(params[:q]))

  respond_to do |format|
    format.html {
      render "active_admin/resource/index"
    }
  end
end

[itelmenko]

Hello, everyone!

Eugene's trick works. But i dont understand why i can not use

  scope = Category.scoped
  @categories = scope.page() if params[:q].blank?
  @search = scope.metasearch(clean_search_params(params[:q]))

instead of

@categories = Category.all

?

Why need I use scope?

Thanks

[seanlinsley]

HI @izumeroot, this ticket is rather old; why not take the standard approach?

controller do
  def scoped_collection
    resource_class.foo.bar.baz
  end
end

[itelmenko]

Hi, Daxter!
But where is respond_to block? I need json and html responds in action...

[itelmenko]

And also how can I write analog for

@category = Category.find(params[:id])

?

[seanlinsley]

What exactly are you trying to accomplish? If all you need is to customize which records show up, use the scoped_collection option. There's no need to redefine controller actions; the CSV, JSON, etc. download links use the same source.

As for an analog for:

@category = Category.find(params[:id])

Two methods are automatically built for you by Inherited Resources

resource # does the same thing as Category.find
category # does the same thing as above, but is named after the class in question

[itelmenko]

I need migrate one of my rails controllers to active_admin.
Now I have something like this

ActiveAdmin.register Category do

  config.clear_sidebar_sections!

  controller do
    layout 'active_admin'

    def index
      #@categories = Category.all

      scope = Category.scoped

      @categories = scope.page() if params[:q].blank?
      @search = scope.metasearch(clean_search_params(params[:q]))

      respond_to do |format|
        format.html # index.html.erb
        format.json { render json: @categories }
      end
    end

    # POST /categories
    # POST /categories.json
    def create
    @category = Category.new(params[:category])

      respond_to do |format|
        if @category.save
          expire_fragment('category_nav')
          expire_fragment('category_tree_data')
          format.html { redirect_to @category, notice: 'Category was successfully created.' }
          format.json { render json: @category, status: :created, location: @category }
          format.js { render :nothing => true }
        else
          format.html { render action: "new" }
          format.json { render json: @category.errors, status: :unprocessable_entity }
        end
      end
    end

  # ......................................

  end
end

If I use @categories = Category.all instead of

@categories = scope.page() if params[:q].blank?
@search = scope.metasearch(clean_search_params(params[:q]))

I get error "undefined method `base' for nil:NilClass"

[seanlinsley]

That index action doesn't do anything custom, so you can just remove it and let Active Admin handle it.

[itelmenko]

If i remove custom index, the ActiveAdmin ignores my custom view-file (with tree and chechbox groups):

app/views/admin_ui/categories/index.html.slim

and displays default grid.

[seanlinsley]

If you move that file to app/views/admin/categories/index.html.slim, then Active Admin will automatically grab it.

If you want to preserve the AA layout, add this as well:

controller do
  def index
    index! do |format|
      format.html{ render layout: 'active_admin' }
    end
  end
end

There might be a cleaner way to preserve the layout, but I'm not sure what it would be.

If you just set layout 'active_admin' but don't create custom views for every page relating to the resource, you run into this:

[itelmenko]

Thank you very much!!!
Trick with "format.html{ render layout: 'active_admin' }" works fine!
Just I need not move view, because in config I have config.default_namespace = :admin_ui

Can I ask one more question about controller mirgation?
I need execute some code before or after default action of ActiveAdmin. How can I do it?
I need something like this:

def update 
    run_before_code
    run_active_admin_update_action
    run_after_code
end

[seanlinsley]

I don't know about running code after, but to run code before just put it before, like this:

controller do
  def update
    # do stuff here
    update!
  end
end

The docs for Inherited Resources are really descriptive: https://github.com/josevalim/inherited_resources

[itelmenko]

Thanks for help!

[itelmenko]

Good railscast for this subject http://asciicasts.com/episodes/230-inherited-resources

[itelmenko]

Good morning!

Sorry. One more querstion, if you can.

How can I add css and js files for my Category page (not for whole active_admin).
I tried use

- content_for :head do
  = javascript_include_tag "active_admin/categories"
  = stylesheet_link_tag "active_admin/categories"

But look like in main active_admin template we have not

yield :head

Need I redefine main active_admin template? :(

[itelmenko]

I found solution:

ActiveAdmin.register Category do
    ActiveAdmin.application.javascripts << 'active_admin/categories'
    ActiveAdmin.application.stylesheets.merge!({'active_admin/categories' => {:media => :screen}})

[itelmenko]

Hello!

Uhh.. no..
If I did so

ActiveAdmin.register Category do
    ActiveAdmin.application.javascripts << 'active_admin/categories'
    ActiveAdmin.application.stylesheets.merge!({'active_admin/categories' => {:media => :screen}}

then it loads for each active_admin controller. But I need it for category controller only.

[itelmenko]

Do anybody know correct way?

[seanlinsley]

There isn't any easy way to conditionally include different assets. What you should instead do is include those assets normally, but scope them to the specific page.

[itelmenko]

I can override this https://github.com/gregbell/active_admin/blob/master/lib/active_admin/views/pages/base.rb
Example (but for footer) is here http://meetdom.com/post/5721099826/customizing-active-admin

[seanlinsley]

There isn't an easy way to do it because you shouldn't do it. It's a Rails convention to compile all assets into a single file.

[itelmenko]

So, it is single file (lib/active_admin_views_pages_base.rb):

..............  
def build_active_admin_head
    within @head do
    insert_tag Arbre::HTML::Title, [title, render_or_call_method_or_proc_on(self, active_admin_application.site_title)].join(" | ")
    active_admin_application.stylesheets.each do |style, options|
        text_node stylesheet_link_tag(style, options).html_safe
    end

    text_node stylesheet_link_tag("active_admin/#{controller.controller_name}", {:media => :screen}).html_safe

    active_admin_application.javascripts.each do |path|
        text_node(javascript_include_tag(path))
    end

    text_node(javascript_include_tag("active_admin/#{controller.controller_name}"))

    if active_admin_application.favicon
        text_node(favicon_link_tag(active_admin_application.favicon))
    end

    text_node csrf_meta_tag
    end
end
    ............................

[railsfactory-madhusudhan]

I want to show only one record in index action of companies in activeadmin. Is there a way to do it? I tried scoped collection, but I think it is expecting collection so I am getting error as undefined method `reorder' for #Company:0xb8a9804. Please help me.

[timoschilling]

@railsfactory-madhusudhan scoped_collection needs to return a query object not a Company instance! You can do:

controller do
  def scoped_collection
    super.where(id: 1)
  end
end

or

controller do
  def scoped_collection
    super.limit(1)
  end
end

[seaify]

now you need to use scope_collection method, not the scoped & metasearch way.

  controller do
    def scoped_collection
      params[:supplier_id] ? Car.where(supplier_id: params["supplier_id"]) : Car.all
    end
  end

[railsfactory-madhusudhan]

thanks @timoschilling and @seaify both solution works!!

[webdev36]

Very thanks @timoschilling and @seaify

[alexventuraio]

Hi there!
Maybe it does not have much to see or is not directly related to the main topic. But I what to download CSV files but not the entire records from a table instead export a custom query or a specific scope. I don't want to only customize the columns but also the records that are exported in the CSV file.
I read that it is related to the info you are viewing in the index page but I want the specific records to be exported and it does not matter if the whole records are shown in the index page, I just want to download a specific query or scope.

Any help or suggestion?
I hope I could be clear.

[Gowtham03]

It Works for me

scope_to :index => :scoped do
current_user_profile.organizations.first
end

[HanyMoh]

HI @izumeroot, this ticket is rather old; why not take the standard approach?

controller do
  def scoped_collection
    resource_class.foo.bar.baz
  end
end

this worked with me

 controller do
    def scoped_collection
      resource_class.current_venodor_products(current_admin)
    end
  end

current_venodor_products is a scope show only records owned by the current vendor