Ruby on Rails中控制器和操作中定义的路径被忽略 [英] Path defined in controller and action is getting ignored, Ruby on Rails

问题描述

根据 http://guides.rubyonrails.org/layouts_and_rendering.html

我应该能够像在micropostscontroller中的create动作中那样定义来自其他控制器的路径:

I should be able to define the path from a different controller as I have done in my create action in my micropostscontroller:

def create
      @micropost = current_user.microposts.build(params[:micropost])
      if @micropost.save
        flash[:success] = "Micropost created!"
        redirect_to profile_path
      else
        render 'static_pages/profile'
      end
    end

但是，如果我未成功创建帖子(将其保留为空白或使其太长)，则会显示页面"/microposts"，即控制器的主页不存在.成功创建微帖子后，我将重定向到配置文件路径"/profile"，并且当我将render 'static_pages/profile'更改为redirect_to profile_path时，重定向有效.为什么浏览器会忽略渲染请求并转到微博控制器的主页?

When I unsuccessfully create a post, however (leave it blank or make it too long), the page '/microposts' is rendered, the nonexistent home page of the controller. When I successfully create a micropost I am redirected to the profile path '/profile', and when I've changed render 'static_pages/profile' to redirect_to profile_path the redirect works. Why is the browser ignoring the render request and going to the microposts controller home?

此外，呈现的微博页面还提供了NoMethodError:

Additionally, the rendered microposts page gives a NoMethodError:

NoMethodError in Microposts#create

undefined method `name' for nil:NilClass

<% provide(:title, @user.name) %>

app/views/static_pages/profile.html.erb:16:in `_app_views_static_pages_profile_html_erb___1610169404003779010_70327969935820'
app/controllers/microposts_controller.rb:10:in `create'

当重定向到个人资料时，个人资料可以很好地呈现，因为@user是在static_pages控制器中的个人资料操作中定义的. @user = User.find_by_remember_token(cookies[:remember_token])

The profile renders fine on its own when when redirected to, as @user is defined in profile action in the static_pages controller. @user = User.find_by_remember_token(cookies[:remember_token])

推荐答案

您的create方法正在尝试呈现"app/views/static_pages/profile.html.erb"，但您尚未为其指定@user来呈现.如果您以此方式修改代码，它应该可以工作:

Your create method is attempting to render 'app/views/static_pages/profile.html.erb', but you haven't given it a @user to render. If you revise your code this way it should work:

def create
  @micropost = current_user.microposts.build(params[:micropost])
  if @micropost.save
    flash[:success] = "Micropost created!"
    redirect_to profile_path
  else
    @user = current_user # Add this line!
    render 'static_pages/profile'
  end
end

请注意，microposts#create方法的路径为/microposts，因此除非您使用redirect_to而不是render，否则它仍将显示在地址栏中.

Note that the path of the microposts#create method is /microposts, so that will still show in your address bar unless you use redirect_to instead of render.

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