如何在轨控制器处理的ActiveRecord :: RecordNotFound？ [英] how to handle ActiveRecord::RecordNotFound in rails controller?

问题描述

我有用户和活动的应用程序。每个用户有几个事件。当用户希望看到一个特定的事件，他会得到这个动作：

I have an app with user and events. Each user has several events. When a user wants to see a specific event he will get to this action:

def show
  begin
    @userEvents = current_user.event
    @event = @userEvents.find(params[:id])
  rescue ActiveRecord::RecordNotFound  
    redirect_to :controller => "main", :action => "index"
  end

  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @event }
  end
end

如果没有找到它意味着他的URL，他正在试图让不属于他的情况下打了用户的事​​件。我想要么他重定向到主页或只是未找到事件的错误显示页面。如果我尝试运行上面这个错误火灾code：

If the event is not found for the user it means he played with the URL and the event he is trying to get does not belong to him. I want to either redirect him to the main page or just display the page with an error that the event is not found. If I try to run the code above this error fires:

AbstractController::DoubleRenderError in EventsController#show 

什么是解决这个问题的最好方法是什么？

What's the best way to fix this?

推荐答案

把的返回的重定向之后

begin
 @userEvents = current_user.event
 @event = @userEvents.find(params[:id])
rescue ActiveRecord::RecordNotFound  
 redirect_to :controller => "main", :action => "index"
 return
end

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