是否可以將控制器動作「映射」到另一個控制器動作，但更改某些參數？

Question

我正在使用Ruby on Rails 3.2.2，我想知道是否可以將控制器操作「映射」到另一個控制器操作，但更改某些參數。也就是說，我有如下模型和控制器：

# File system: 
# /app/models/articles/user_association.rb 
# /app/models/users/article_association.rb 
# /app/controllers/users/article_associations_controller.rb 
# /app/controllers/articles/user_associations_controller.rb 


# /app/models/articles/user_association.rb 
class Articles::UserAssociation < ActiveRecord::Base 
    ... 
end 

# /app/models/users/article_association.rb 
class Users::ArticleAssociation < Articles::UserAssociation # Note inheritance 
    #none 
end 

# /app/controllers/users/article_associations_controller.rb 
class Articles::UserAssociationsController < ApplicationController 
    def show 
    @articles_user_association = Articles::UserAssociation.find(params[:article_id]) 
    ... 
    end 

    def edit 
    @articles_user_association = Articles::UserAssociation.find(params[:article_id]) 
    ... 
    end 

    ... 
end 

# /app/controllers/articles/user_associations_controller.rb 
class Users::ArticleAssociationsController < ApplicationController 
    def show 
    # It is the same as the Articles::UserAssociationsController#show 
    # controller action; the only thing that changes compared to 
    # Articles::UserAssociationsController#show is the usage of 
    # 'params[:user_id]' instead of 'params[:article_id]'. 
    @users_article_association = Users::ArticleAssociation.find(params[:user_id]) 
    ... 
    end 

    def edit 
    # It is the same as the Articles::UserAssociationsController#edit 
    # controller action; the only thing that changes compared to 
    # Articles::UserAssociationsController#edit is the usage of 
    # 'params[:article_id]' instead of 'params[:user_id]'. 
    @users_article_association = Users::ArticleAssociation.find(params[:user_id]) 
    ... 
    end 

    ... 
end 

所以，我想處理指向/users/:user_id/article路徑相關/articles/:article_id/user路徑控制器動作HTTP請求。

注：我想提出的是，爲了乾的（不要重複自己）的代碼，但是，正如前面所說，Users::ArticleAssociationsController和Articles::UserAssociationsController#show之間改變的唯一事情是params。

可能嗎？

Answer 1

您不僅可以修改參數，還可以更改要查找的類。

@users_article_association = Users::ArticleAssociation.find(params[:user_id]) 
# and 
@users_article_association = Articles::UserAssociation.find(params[:article_id]) 

它們完全不同。我建議你處理這些差異，然後將真正的通用代碼提取到另一種方法，並從雙方進行調用。