我将使用StackOverflow作为我的示例。假设我有Question
模型。登录用户可以“标记”Question
以标记为他们的最爱之一。在数据库中,这种事情可能存储在UserQuestions
表中,其中包含user_id
字段和question_id
字段。这种功能不是典型的CRUD,因为实际上只有“list”,“add”和“delete”。此外,“用户加星标的问题”列表中显示的记录不应是UserQuestion
条记录,而应是Question
条记录。我在控制器和UserQuestion
模型中放了什么代码?
class MyFavoriteQuestionsController < ApplicationController
def index
#list just the questions associated with current_user
end
def add
#insert a row in the database for current_user and selected question
def
def remove
#remove the row from the database
end
end
答案 0 :(得分:7)
如果你坚持惯例,我会说这是典型的问题。添加是创建,删除是销毁。
class FavouritesController < ApplicationController
before_filter :find_user
def index
@favourites = @user.favourites
end
def create
@question = Question.find params[:id]
@user.favourites << @question
def
def destroy
@favourite = @user.favourites.find_by_question_id params[:id]
@favourite.destroy unless @favourite.blank?
end
end
#routes.rb
resources :users do
resources :favourites, :only => [:index, :create, :destroy]
end
#user.rb
has_many :user_favourites, :dependent => :destroy
has_many :favourites, :through => :user_favourites, :source => :question