Ruby on Rails:redirect_to在创建和保存后无法正常工作

Question

我想redirect_to slider_path在用户提交他们的电子邮件之后.目前,仅显示成功消息而没有重定向.这是代码:

class Splash::SubscribersController < ApplicationController

def create

  @subscriber = Subscriber.new(params[:subscriber])

  if @subscriber.save
    success = true
    message = "Success! We'll let you know when we launch."
  else
    success = false
    message = "Fail."
  end

  respond_to do |format|
    format.html { 
      if success
        flash[:success] = message
        redirect_to slider_path
      else 
        flash[:error] = message
      end
      redirect_to root_path 
    }
    format.json { render :json => { :success => success, :message => message }.to_json }
  end  
 end
end

Answer 1

Rails API声明:

操作可能只包含单个渲染或单个重定向.尝试再次尝试将导致DoubleRenderError:

def do_something
  redirect_to :action => "elsewhere"
  render :action => "overthere" # raises DoubleRenderError
end

如果你需要重定向某事的条件,那么一定要添加"并返回"以停止执行.

def do_something
  redirect_to(:action => "elsewhere") and return if monkeys.nil?
  render :action => "overthere" # won't be called if monkeys is nil
end

注意使用 and return

Answer 2

只需替换这部分代码:

  if success
    flash[:success] = message
    redirect_to slider_path
  else 
    flash[:error] = message
  end
  redirect_to root_path

有了这个:

  if success
    flash[:success] = message
    redirect_to slider_path
  else 
    flash[:error] = message
    redirect_to root_path 
  end