Question

我参加并删除了我正在使用的方法，如下所示：

      def attend
    @event = Event.find(params[:id])
    if @event.users.include?(current_user)
      flash[:error] = "You're already attending this event."
    else
      current_user.events << @event
      flash[:success] = "Attending event!"
    end
    redirect_to @event
  end




def remove_attendee
    @event = Event.find(params[:event_id])
    @event.users.destroy(params[:user_id])
    flash[:success] = "User removed from event."
    redirect_to @event
  end

然后我还有一个视图，其中列出了参加活动的所有用户：

The attendees of this event are:</br></br>
<% @attendees.each do |user| %>

    <li><%= link_to user.name, user %>
    <% if @event.users.include?(user) && (user == current_user) %>
        <%= button_to 'Remove', remove_attendee_event_path(:event_id => @event.id, :user_id => user.id), :method => :post %>
    <% end %>
    </li>

<% end %>

最后，我有参加活动按钮：

`<%= button_to 'Attend Event', attend_event_path(@event.id), :method => :post %>`

问题是，当我点击参加，然后删除与会者，它很有效。然后，当我再次尝试参加活动时......它给出了一个错误“在EventsController中出现NoMethodError＃参加”

然后，当我只想删除该用户与事件之间的关系时，它会删除我正在使用的当前用户...我做错了什么？

Answer 1

我认为通常情况下，这看起来像这样：

# config/routes
resources :events do
  resources :attendees, :only => [:create, :destroy]
end

# app/controllers/attendees_controller.rb
class AttendeesController < ApplicationController
  def create
    @event = Event.find(params[:event_id])
    if @event.users.include?(current_user)
      flash[:error] = "You're already attending this event."
    else
      current_user.events << @event
      flash[:success] = "Attending event!"
    end
    redirect_to @event
  end

  def destroy
    @event = Event.find(params[:event_id])
    @event.users.destroy(current_user)
    flash[:success] = "User removed from event."
    redirect_to @event
  end
end

# app/views/events/show.html.erb
The attendees of this event are:

<% @attendees.each do |user| %>
  <li>
    <%= link_to user.name, user %>
    <% if user == current_user %>
        <%= button_to 'Remove', event_attendee_path(:event_id => @event.id, :id => current_user.id), :method => :delete %>
    <% end %>
  </li>
 end %>

Answer 2

好的，试试这个？

  def remove_attendee
    user = User.find(params[:user_id])
    user_event=user.events.find(params[:event_id])
    user.events.delete(user_event)
    flash[:success] = "User removed from event."
    redirect_to @event
  end

创建，销毁，然后创建两个模型之间的关系不断打破

2 个答案: