Niezdefiniowana metoda "zmiana kolejności" dla # <Tablica: 0xbc38600> przy użyciu ActiveAdmin

Question

Mam problem z ActiveAdmin przy użyciu Ruby Ruby 1.9.2p290 i Ruby on Rails 3.2.1.

Użyłem tej strony wiki do konfiguracji zasobu dla AdminUsers że działa perfekcyjnie: Your First Admin Resource: AdminUser

Po tym chciałem stworzyć zasób dla mojego modelu projektu. Migracje za to wygląda następująco:

class CreateProjects < ActiveRecord::Migration 
    def change 
    create_table :projects do |t| 
     t.string :name 
     t.text :description 
     t.boolean :isactive 

     t.timestamps 
    end 
    end 
end 

class AddSlugToProjects < ActiveRecord::Migration 
    def change 
    add_column :projects, :slug, :string 
    add_index :projects, :slug 
    end 
end 

Mój model projektu:

class Project < ActiveRecord::Base 

    scope :isactive, :conditions => ["isactive = ?",true] 

    extend FriendlyId 
    friendly_id :name, use: [:slugged, :history] 

    attr_accessible :name, :description, :isactive 

end 

I to jest project_controller:

class ProjectsController < ApplicationController 

    def index 
    # 
    # @projects gets filled in application_controller to be always 
    # available for the twitter bootstrap navbar 
    # @projects = Project.isactive.find(:all, :order => 'LOWER(name) asc') 
    # 
    end 

    def show 
    @project = Project.isactive.find(params[:id]) 
    if request.path != project_path(@project) 
     redirect_to @project, :status => :moved_permanently 
    end 
    end 

end 

Administrator/projects.rb obecnie jest 'pusty'

ActiveAdmin.register Project do 
end 

A przecież, że wszystko, co mam jest następujący błąd:

Started GET "/admin/projects" for 192.168.0.2 at 2012-02-21 20:58:49 +0100 
Processing by Admin::ProjectsController#index as HTML 
    Project Load (0.1ms) SELECT "projects".* FROM "projects" WHERE (isactive = 't') ORDER BY LOWER(name) asc 
    AdminUser Load (0.1ms) SELECT "admin_users".* FROM "admin_users" WHERE "admin_users"."id" = 2 LIMIT 1 
    Rendered /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/activeadmin-0.4.1/app/views/active_admin/resource/index.html.arb (11.7ms) 
Completed 500 Internal Server Error in 54ms 

ActionView::Template::Error (undefined method `reorder' for #<Array:0xa3ecd44>): 
    1: render renderer_for(:index) 
    activeadmin (0.4.1) lib/active_admin/views/pages/index.rb:41:in `items_in_collection?' 
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    activeadmin (0.4.1) lib/active_admin/views/pages/base.rb:116:in `block (2 levels) in build_main_content_wrapper' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:68:in `block in build_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:96:in `with_current_dom_context' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:67:in `build_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:77:in `insert_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/html/element.rb:17:in `div' 
    activeadmin (0.4.1) lib/active_admin/views/pages/base.rb:115:in `block in build_main_content_wrapper' 
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    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:96:in `with_current_dom_context' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:67:in `build_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:77:in `insert_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/html/element.rb:17:in `div' 
    activeadmin (0.4.1) lib/active_admin/views/pages/base.rb:114:in `build_main_content_wrapper' 
    activeadmin (0.4.1) lib/active_admin/views/pages/base.rb:98:in `block in build_page_content' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:68:in `block in build_tag' 
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    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:67:in `build_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/builder.rb:77:in `insert_tag' 
    activeadmin (0.4.1) lib/active_admin/arbre/html/element.rb:17:in `div' 
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    activeadmin (0.4.1) app/views/active_admin/resource/index.html.arb:1:in `__home_eins____rbenv_versions_______p____lib_ruby_gems_______gems_activeadmin_______app_views_active_admin_resource_index_html_arb___523541447_100786690' 
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    actionpack (3.2.1) lib/action_controller/metal/streaming.rb:225:in `_render_template' 
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    activesupport (3.2.1) lib/active_support/core_ext/benchmark.rb:5:in `block in ms' 
    /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/benchmark.rb:310:in `realtime' 
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    actionpack (3.2.1) lib/action_controller/metal/mime_responds.rb:238:in `respond_with' 
    inherited_resources (1.3.0) lib/inherited_resources/actions.rb:7:in `index' 
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    /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' 


    Rendered /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.1/lib/action_dispatch/middleware/templates/rescues/_trace.erb (5.1ms) 
    Rendered /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.1ms) 
    Rendered /home/eins11/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.1/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (9.8ms) 

I nie mam pojęcia, co problem ...

Answer 1

Ach, znalazłem rozwiązanie. Nie wiem dokładnie, dlaczego błąd się wydarzył, ale musiałem zmienić mój application_controller.

W application_controller I pobrane wszystkie projekty @projects:

before_filter :getActiveProjects 

protected 

    def getActiveProjects 
    @projects = Project.isactive.find(:all, :order => 'LOWER(name) asc') 
    end 

To było mylące ActiveAdmin. Po zmianie, że do

before_filter :getActiveProjects 

protected 

    def getActiveProjects 
    @projects_all = Project.isactive.find(:all, :order => 'LOWER(name) asc') 
    end 

i projects_controller akcji index do

def index 
    @projects = @projects_all 
end 

wszystko działało w porządku;)

Answer 2

Łatwiejszy rozwiązaniem jest po prostu pominąć filtr w szczególności aktywnego kontrolera admin:

ActiveAdmin.register Project do 
    controller do 
     skip_before_filter :getActiveProjects 
    end 
end 

Answer 3

Aktywny administrator wykonuje specjalne przetwarzanie @resource zmienne. Gdzie resource jest odpowiednia nazwa klasy przekazana do metody rejestru. Tak dla kodu:

ActiveAdmin.register Project do 
end 

nazwa zmiennej jest

`@project` 

Nie możemy przypisać wartość do zmiennej o takiej nazwie. Również takie varible mogą być obiektem klasy ActiveRecord :: Relation. A jak @Oliver napisać taką nazwę jak @projects_all jest dobrym wyborem. Używanie skip_before_filter również rozwiązuje problem.

Jedna sprytna rzecz musi sprawdzić. Kontroler zasobu może nie mieć żadnych filtrów. Kontroler zasobów może w ogóle nie istnieć. Jaka jest nazwa filtra, który należy umieścić na skip_before_filter? A gdzie są takie filtry? Domyślnie używany jest kontroler aplikacji. Filtr może być zainstalowany w głównym kontrolerze aplikacji.Komunikat o błędzie tego problemu nie jest wcale informacyjny. Dlatego należy sprawdzić kontroler aplikacji dla zainstalowanych filtrów.