Rails Michael Hartl教程+设计current_user？ [英] Rails Michael Hartl Tutorial + Devise current_user?

问题描述

我正在尝试在我的rails作曲器devise应用中实施M. Hartl教程中的以下操作。

I am trying to implement the follow actions from M. Hartl's tutorial in my rails composer, devise app.

但是由于某种原因，我会收到此错误

But for some reason i get this error

undefined method `current_user?' for 

<% unless current_user?(@user) %>
  <div id="follow_form">
  <% if current_user.following?(@user) %>
    <%= render 'unfollow' %>
  <% else %>
    <%= render 'follow' %>
  <% end %>
  </div>
<% end %>

知道为什么吗？

谢谢

推荐答案

Devise默认为您提供 current_user 助手。但是，它没有给您 current_user？布尔方法。您需要在 application_helper.rb 中自己定义此方法：

Devise gives you the current_user helper by default. However, it doesn't give you current_user? boolean method. You need to define this method yourself in application_helper.rb:

def current_user?(user)
  user == current_user
end

现在 current_helper？定义了您可以传入 @user 实例变量

Now you have current_helper? defined you can pass in your @user instance variable

<% unless current_user?(@user) %>
  <div id="follow_form">
  <% if current_user.following?(@user) %>
    <%= render 'unfollow' %>
  <% else %>
    <%= render 'follow' %>
  <% end %>
  </div>
<% end %>

这就是您要做的一切。您无需以任何方式触摸您的 ApplicationController或SessionsHelper 。您只需使用Devise提供的 current_user 来定义 current_user？（user）。这种方式更容易实现。希望这会有所帮助

Thats all you have to do. You don't have to touch your ApplicationController or SessionsHelper in any way. You are simply using current_user which Devise gives you in order to define current_user?(user). This way is much easier to implement. Hope this helps

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