Question

我有以下ActiveAdmin模型

class AdminUser < ActiveRecord::Base
has_many :challenges

  devise :database_authenticatable, 
         :recoverable, :rememberable, :trackable, :validatable
end

以及以下挑战模型

class Challenge < ActiveRecord::Base
    belongs_to :subdomain
    belongs_to :admin_user

    has_many :comments, :dependent => :destroy

end

我在application.html.erb中定义了以下方法

 helper_method :all_admin_users

  def all_admin_users

    @users = AdminUser.all
  end

Adminuser具有以下属性：id，：name，：email 现在，当我尝试访问特定用户的挑战时

<ul>
<% all_admin_users.each do |user| %>
<li> <%= link_to user.name ,user.challenges%></li>
<br />
<% end %>
</ul>

我收到以下错误＆＃34;未定义的方法`to_model＆＃39; for Challenge :: ActiveRecord_Associations_CollectionProxy

这是我的routes.rb文件

Rails.application.routes.draw do
  resources :comments
  devise_for :admin_users, ActiveAdmin::Devise.config

  get 'subdomains/index'

  get 'subdomains/edit'

  get 'subdomains/new'

  get 'subdomains/show'

  get 'home/index'




 root 'home#index'


 resources :challenges

 resources :subdomains
  ActiveAdmin.routes(self)
end

Answer 1

首先在routes文件中，您需要添加操作以列出用户挑战的

在routes.rb末尾添加

get 'users/:user_id/challenges' => 'challenges#user_challenges', as: :user_challenges
# this way you will have action to view users challenges
# inside your challenges controller

在challenges_controller.rb添加操作user_challenges

中

def user_challenges
  @challenges = Challenge.where(admin_user_id: params[:user_id])
end

为此操作创建视图，并显示您的挑战

然后您可以为此操作创建链接

<ul>
  <% all_admin_users.each do |user| %>
    <li> <%= link_to user.name , user_challenges_path(user.id)%> </li>
    <br />
  <% end %>
</ul>

Answer 2

而不是user.challenges使用user.challenge

<强>更新

<ul>
  <% all_admin_users.each do |user| %>
    <% user.challenges.each do |challenge| %>
      <li> <%= link_to user.name ,challenges_path(user_id: user.try(:id)) %></li>
      <br />
    <% end %>
  <% end %>
</ul>

challenges_controller.rb

def index
  @challenges = Challenge.where(admin_user_id: params[:user_id])
end

Answer 3

作为Prashant4020答案的补充 - 您对更新用户模型的看法：

class User < ActiveRecord::Base
...
belongs_to :admin_user
...

因此

class AdminUser < ActiveRecord::Base
has_many :challenges
has_many :users
....

未定义的方法`to_model＆＃39;在铁轨

3 个答案: