管理中的 AbstractController::DoubleRenderError [英] AbstractController::DoubleRenderError in Admin

问题描述

我正在从事狂欢商务，我正在尝试调整 active_sale_controller 中的几个操作.我有一些条件，如果条件失败，我将redirecting_to (:back) 否则我将进行下一步.我现在面临的问题是我在同一个动作中使用了 redirected_to (:back) 两次，而且我在同一个动作中又使用了一个 redirected_to 到其他控制器，浏览器显示了一个错误，内容为

I am working on spree commerce, I am trying to tweak couple of actions in the active_sale_controller. I have some conditions, if the condition fails I am redirecting_to (:back) else I am proceeding to next step. The problem I am facing right now is I have used redirected_to (:back), twice in the same action and also I have one more redirected_to to some other controller in the same action, the browser shows a error which is says

"Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return"." 

这是我的代码

when "2"
    st_days = DateTime.strptime("#{start_date}","%d/%m/%Y %H:%M:%S")
    ed_days = DateTime.strptime("#{end_date}","%d/%m/%Y %H:%M:%S")
    ps = PoSale.where(:active_sale_id => @active_sale.id, :event_name => @taxon_name,:st_date => @start_date, :ed_date => @end_date).last
    if ((st_days >= ps.st_date and st_days <= ps.ed_date) or ( ed_days >= ps.st_date and ed_days <= ps.ed_date))   
        redirect_to (:back), :notice => "problem with the start_date and end_date"
    else
        PoSale.create(:active_sale_id => params[:id], :event_name => params[:active_sale]["taxon_name"], :st_date => DateTime.strptime("#{start_date}","%d/%m/%Y %H:%M:%S"), :ed_date => DateTime.strptime("#{end_date}","%d/%m/%Y %H:%M:%S"))
    end         
    when "3"
        puts "Inside 3"
        puts "*"*20
        #hidesd = DateTime.parse(params[:hide_start_date].split("+")[0])
        #hideed = DateTime.parse(params[:hide_end_date].split("+")[0])
        # hideed = DateTime.strptime("#{hide_end_date}","%d/%m/%Y %H:%M:%S")
        puts "*"*20
        #puts "Parameters:#{hidesd}"
        #puts hideed
        a_sale_id=params[:id].to_i
        #PoSale.where("active_sale_id = 310 and st_date = '2012-07-05 03:03:00' and ed_date ='2012-07-12 08:03:00'")
        st_days = DateTime.strptime("#{start_date}","%d/%m/%Y %H:%M:%S")
        ed_days = DateTime.strptime("#{end_date}","%d/%m/%Y %H:%M:%S")

        diff = (st_days.to_date - ed_days.to_date).to_i
        if diff > 10 
            redirect_to (:back), :notice => "more then 10 days not hapenning"      
        else
            ps = PoSale.where(:active_sale_id => a_sale_id, :event_name => @taxon_name, :st_date => @start_date, :ed_date => @end_date).last #where("active_sale_id =#{a_sale_id} and st_date like ? and ed_date like ?",hidesd.strftime("%Y-%m-%d %H:%M:%S"),hideed.strftime("%Y-%m-%d %H:%M:%S")).last #use find
            ps.update_attributes(:event_name => params[:active_sale]["taxon_name"], :st_date => DateTime.strptime("#{start_date}","%d/%m/%Y %H:%M:%S"), :ed_date => DateTime.strptime("#{end_date}","%d/%m/%Y %H:%M:%S"))
        end

请帮帮我！！！

推荐答案

redirect_to 不会停止 action 方法的执行，因此如果您调用它并稍后调用 render 或另一个 redirect_to 你会得到双重渲染异常.有一个相当简单的修复方法，只需调用 并返回.例如

redirect_to does not stop execution of the action method so if you call it and later call render or another redirect_to you will get the double render exception. There is a fairly simple fix, just call and return. e.g.

redirect_to (:back), :notice => "problem with the start_date and end_date" and return

请参阅Rails 指南.

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