Question

我目前正在尝试在我的rails应用程序中实现一个喜欢的功能。但是，当我尝试单击添加到收藏夹链接时，我收到错误消息：

无法在模型FavoriteEvent中找到源关联：favorite或：Favorites。试试'has_many：favorites，：through =＆gt; ：favorite_events，：source =＆gt; ”。它是以下之一：event或：user？

我的尝试如下：

Event.rb

class Event < ActiveRecord::Base
    belongs_to :user
    has_many :favorite_events
    has_many :favorited_by, through: :favorite_events, source: :user
end

User.rb

class User < ActiveRecord::Base
    has_many :events
    has_many :favorite_events
    has_many :favorites, through: :favorite_events
end

Favorite_event.rb

class FavoriteEvent < ActiveRecord::Base
    belongs_to :user
    belongs_to :event
end

event_controller

def favorite
    type = params[:type]
    if type == "add"
        current_user.favorites << @event
    else
        redirect_to :back, notice: 'Event not added'
    end
end

查看

<%= link_to "Add to calendar",   
    favorite_event_path(@event, type: "favorite"),
    method: :put %>

路线

resources :events do
    put :favorite, on :member
end

Answer 1

class User < ActiveRecord::Base
    has_many :favorite_events
    has_many :events
    has_many :favorites, through: :favorite_events, source: :event
end

Answer 2

你的模型结构应该是这样的。

<强> event.rb

class Event < ActiveRecord::Base
    belongs_to :user
end

<强> user.rb

class User < ActiveRecord::Base
    has_many :events
    has_many :favorite_events
    has_many :favorites, through: :favorite_events
end

<强> favorite_event.rb

class FavoriteEvent < ActiveRecord::Base
    belongs_to :user
    belongs_to :event
end

这表明：用户has_many事件和一个用户has_many favorite_event通过事件。

我认为你想要实施。我是对的吗？@adanot？

Rails Has_many通过源关联未找到错误

2 个答案: