ruby-on-rails - 双渲染错误轨

Question

不确定如何得到这个错误:

AbstractController::DoubleRenderError users#create

在我的 Controller 中，我得到了这段代码:

render 'new' and return

我从 bugsnag 那里得到了日志，说我在这一行遇到了错误。

这是创建方法代码:

def create
    back_button and return if params[:back_button]

    @profile = current_user.build_profile(params[:user])

    if @profile.nil? || current_user.nil? || @profile.user.nil?
      sign_out
      redirect_to signup_path and return
    end

    if @profile.new_record?
      render 'new' and return
    else
      redirect_to more_questions_path and return
    end
end

我在这个 Controller 中有之前的过滤器:

before_filter :signed_in_user

def signed_in_user
      unless signed_in?
        store_location
        redirect_to signin_url, notice: "Please sign in."
      end
    end

Answer 1

试一试:

class UsersController < ApplicationController
  before_filter :signed_in_user

  def create
    return back_button if params[:back_button]

    @profile = current_user.build_profile(params[:user])

    if @profile.nil? || current_user.nil? || @profile.user.nil?
      sign_out
      return redirect_to signup_path
    end

    if @profile.new_record?
      render 'new'
    else
      redirect_to more_questions_path
    end
  end

  private

  def signed_in_user
    unless signed_in?
      store_location
      return redirect_to signin_url, notice: "Please sign in."
    end
  end
end

背后的原因:x and return 意思是x and return nil，因此返回nil。实际上，您尝试使 Controller Action 短路，然后 return redirect_to ...。