1

使用以下系统，用户可以以以下格式收藏样式：

=> #<Favorite id: 59, user_id: 2, favoritable_id: 15, favoritable_type: "Style", created_at: "2013-04-06 08:47:08", updated_at: "2013-04-06 08:47:08">

我已经构建了系统以使用户也可以收藏用户，但是由于某种原因，当在UserFavorite.create!(:user => user)上调用时，该行没有创建预期的收藏模型对象，就像在Style上调用时一样。相反，我得到如下零点：

=> #<Favorite id: 65, user_id: 2, favoritable_id: nil, favoritable_type: nil, created_at: "2013-04-06 09:35:07", updated_at: "2013-04-06 09:35:07">

问题在上面。详情如下

最喜欢的班级：

class Favorite < ActiveRecord::Base
 belongs_to :favoritable, :polymorphic => true
 belongs_to :user
 attr_accessible :user
 validates_presence_of :user
 validates_uniqueness_of :user_id, :scope => [:favoritable_type, :favoritable_id]
end

模型定义，包括最喜欢的模块（见下文）：

class User < ActiveRecord::Base
  include Favoritable

class Style < ActiveRecord::Base
  include Favoritable

喜欢的模块：

module Favoritable
  extend ActiveSupport::Concern

  included do
    attr_accessible :favorites
    has_many :favorites, :as => :favoritable, :autosave => true
    accepts_nested_attributes_for :favorites

    def add_favorite(user)
      self.favorites << Favorite.create!(:user => user)
      save
    end

    def delete_favorite(user)
      self.favorites.where(:user_id => user.id).each do |favorite|
        favorite.destroy
      end
    end

  end

end

收藏夹控制器：

class FavoritesController < ApplicationController

  def fav_user
    @user = User.find(params[:id])
    @user.add_favorite(current_user)
    respond_to do |format|
      format.js { render :action => "update_favorite_disp", :layout => false }
    end
  end

  def delete_fav_user
    @user = User.find(params[:id])
    respond_to do |format|
      if @user.delete_favorite(current_user)
        format.js { render :action => "update_favorite_disp", :layout => false }
      end  
    end
  end 

  def fav_style
    @style = Style.find(params[:id])
    @style.add_favorite(current_user)
    respond_to do |format|
      format.js { render :action => "update_favorite", :layout => false }
    end
  end 

  def delete_fav_style
    @style = Style.find(params[:id])
    respond_to do |format|
      if @style.delete_favorite(current_user)
        format.js { render :action => "update_favorite", :layout => false }
      end  
    end
  end 

end
4

1 回答 1

1

您需要在 :favoritable 模型中传递add_favorite：

def add_favorite(user)
  Favorite.create!(:user =>user, :favoritable => self)
save

delete_favorite还需要根据:favoritable_id, 而不是删除:user_id：

def delete_favorite(user)
  user.favorites.where(:favoritable_id => self.id).each do |favorite|
    favorite.destroy
  end
end
于 2013-04-06T21:46:49.890 回答