设计渲染标志=>代码中的其他地方的部分 [英] Devise render sign => up/in form partials elsewhere in code

问题描述

我刚从Devise和Rails3开始。我有Authenetication下来和工作，并了解基础。

截至目前，在我的家庭控制器，代表我的家/页面我有两个链接，链接到注册=> sign_up，一个根据login / logout => sign_in / sign_out而改变。

但是，我不想将用户重定向到登录页面。相反，我想在我的首页上显示我的登录表单。所以我已经将视图和_form.html.erb部分的 devise / session / new template int分开。

现在在我的家庭视图中，我渲染登录表单如下：

 <％if user_signed_in？ ％GT; 
欢迎：< b><％= current_user.username％> （<％= current_user.group.name％>）< / b> 
<％= link_to注销，destroy_user_session_path，：method => 'delete'％> 
<％else％> 
<％= render'devise / sessions / form'％> //渲染部分在这里
<％= link_to登录，new_user_session_path％> 
<％end％> 
< hr> 
  

这是部分代码：

 <％= form_for（resource，：as => resource_name，：url => session_path（resource_name））do | f | ％GT; 
< div><％= f.label：email％>< br /> 
<％= f.email_field：email，：autofocus => true％>< / div> 
 
< div><％= f.label：password％>< br /> 
<％= f.password_field：password％>< / div> 
 
<％if devise_mapping.rememberable？ - ％GT; 
< div><％= f.check_box：remember_me％> <％= f.label：remember_me％>< / div> 
<％end  - ％> 
 
< div><％= f.submit登录％>< / div> 
<％end％> 
  

我的错误如下：

  HomeError in Home＃index 
 
显示设计/会话/ _form.html.erb，其中第1行上升：
 
未定义的局部变量或＃<＃< Class：0x614ec68>：0x6157ff8>的方法`resource' 
提取源（绕行＃1）：
 
 1：<％= form_for（resource，：as => resource_name，：url => session_path（resource_name） F | ％GT; 
 2：< div><％= f.label：email％>< br /> 
 3：<％= f.email_field：email，：autofocus => true％>< / div> 
 4：
  

我明白为什么错误发生。这是因为它没有被赋予资源属性。我使用 dump（resource），原来它是一个用户模型/对象所以我添加了以下内容：

 <％if @user％> 
<％resource = @user％> 
<％end％> 
  

并添加以下到我的主页控制器索引方法：

  def index 
 @user = User.new 
 end 
  

然而，之后，我得到resource_name错误，原来简单地是：user ，如果我设置，那么我得到一个问题，因为 devise_mapping.rememberable？我不知道如何提供。

我想要正确地做到这一点，所以我想避免

解决方案

看看这个问题的答案：在不同的控制器内改变表单

您尝试使用家庭控制器呈现的表单依赖于Devise定义的帮助者，无法从非Devise控制器访问。

将必要的助手添加到你的home_help er.rb应该解决你的问题：

  def resource_name 
：user 
 end 
 
 def resource 
 @resource || = User.new 
 end 
 
 def devise_mapping 
 @devise_mapping || = Devise.mappings [：user] 
 end 
  

I'm just starting with Devise and Rails3. I have the Authenetication down and working and understand the basics.

As of now in my Home Controller that represents my Home/Front Page i have two links one that links to Register => sign_up and one that changes depending on login/logout => sign_in/sign_out.

However i dont want to redirect my user to login page. Instead i want to display my login form on my front page. So i have seperated the devise/session/new template int to a view and a _form.html.erb partial.

And now in my home view i render the login form as so:

<% if user_signed_in? %>
    Welcome: <b><%= current_user.username %> (<%= current_user.group.name %>)</b>
    <%= link_to "Logout", destroy_user_session_path, :method => 'delete' %>
<% else %>
    <%= render 'devise/sessions/form' %> // Rendering the partial here
    <%= link_to "Login", new_user_session_path %>
<% end %>
<hr>

This is the code of the partial:

<%= form_for(resource, :as => resource_name, :url => session_path(resource_name)) do |f| %>
  <div><%= f.label :email %><br />
  <%= f.email_field :email, :autofocus => true %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password %></div>

  <% if devise_mapping.rememberable? -%>
    <div><%= f.check_box :remember_me %> <%= f.label :remember_me %></div>
  <% end -%>

  <div><%= f.submit "Sign in" %></div>
<% end %>

My error is as follows:

NameError in Home#index

Showing devise/sessions/_form.html.erb where line #1 raised:

undefined local variable or method `resource' for #<#<Class:0x614ec68>:0x6157ff8>
Extracted source (around line #1):

1: <%= form_for(resource, :as => resource_name, :url => session_path(resource_name)) do |f| %>
2:   <div><%= f.label :email %><br />
3:   <%= f.email_field :email, :autofocus => true %></div>
4: 

I understand why the error happens. It's because the partial it not being given the resource attribute. I used dump(resource) and it turns out it's a User model/object So i added the following before it:

<% if @user %>
   <% resource = @user %>
<% end %>

And added following to my Home controller index method:

def index
   @user = User.new
end

However after that i get resource_name error that turns out to simply be :user and if i set that then i get a problem because of devise_mapping.rememberable? which i dont know how to provide.

I want to do this properly so i want to avoid messy and unlogical approach that i started.

解决方案

Take a look at the answer to this question: Devise form within a different controller

The form you are attempting to render with your Home controller relies on helpers defined by Devise that are not accessible from a non-Devise controller.

Adding the necessary helpers to your home_helper.rb should solve your problem:

def resource_name
:user
end

def resource
@resource ||= User.new
end

def devise_mapping
@devise_mapping ||= Devise.mappings[:user]
end

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