ruby-on-rails - Rails 添加新 View 设计

Question

我在安装 devise 后用这个命令生成了 View

rails generate devise:views

我通过

覆盖注册 Controller

class RegistrationsController < Devise::RegistrationsController

  def sign_up2

  end
end

并用

更新了 routes.rb

  devise_for :users, :controllers => { :registrations => "registrations" }  

我希望看到一个新的路线/ View

  /users/sign_up2

但是我没看到这里是设计路线

        new_user_session GET    /users/sign_in(.:format)       devise/sessions#new
            user_session POST   /users/sign_in(.:format)       devise/sessions#create
    destroy_user_session DELETE /users/sign_out(.:format)      devise/sessions#destroy
           user_password POST   /users/password(.:format)      devise/passwords#create
       new_user_password GET    /users/password/new(.:format)  devise/passwords#new
      edit_user_password GET    /users/password/edit(.:format) devise/passwords#edit
                         PATCH  /users/password(.:format)      devise/passwords#update
                         PUT    /users/password(.:format)      devise/passwords#update
cancel_user_registration GET    /users/cancel(.:format)        registrations#cancel
       user_registration POST   /users(.:format)               registrations#create
   new_user_registration GET    /users/sign_up(.:format)       registrations#new
  edit_user_registration GET    /users/edit(.:format)          registrations#edit
                         PATCH  /users(.:format)               registrations#update
                         PUT    /users(.:format)               registrations#update
                         DELETE /users(.:format)               registrations#destroy

但我想要一个新的 View 和路线

更新:加载 View 时出现问题

First argument in form cannot contain nil or be empty

在这一行

<%= form_for(resource, :as => resource_name,:html => { :class => "form-horizontal col-sm-12",:role=>"form"}, :url => user_registration_path(resource_name)) do |f| %>

Answer 1

调用一个 devise_scope block 并在其中声明您的自定义路由:

devise_for :users, :controllers => { :registrations => "registrations" }  
devise_scope :user do
  get "users/sign_up2"=> "users/registrations#sign_up2", :as => "sign_up2_registration"
end

关于 Configuring routes 的部分在文档中提供了以下对 devise_scope 的解释:

If you have the need for more deep customization, for instance to also allow "/sign_in" besides "/users/sign_in", all you need to do is to create your routes normally and wrap them in a devise_scope block in the router

以前，Devise 允许将自定义路由作为 block 传递给 devise_for，但是 this behavior has been deprecated .

更新:

要解决 First argument in form cannot contain nil or be empty 错误，您需要确保您的自定义 sign_up2 操作正确设置了 resource变量。假设您想模仿 registrations/new 操作，您可以执行类似于以下操作的操作:

def sign_up2
    build_resource({})
    respond_with self.resource
end

这确保您 View 中的 resource 变量不是 nil 并且不会抛出您当前看到的异常。

或者，根据您试图表现的行为，您可以在自定义 Controller 操作中设置您自己的实例变量，然后将其作为资源传递给您的form_for标签:

# app/controllers/users/registrations_controller.rb
def sign_up_2
    @new_registrant = Registrant.new
end

# app/views/users/sign_up2.html.erb
<%= form_for(@new_registrant, :as => resource_name,:html => { :class => "form-horizontal col-sm-12",:role=>"form"}, :url => user_registration_path(resource_name)) do |f| %>

但是，如果您采用这种方法，您应该考虑为什么您需要将其整合到 Devise 中。默认情况下，设计通过 build_resource 函数分配 resource 变量。如果您要覆盖/绕过此函数，您应该考虑从 Devise 中抽象出整个功能，因为您完全避开了它的默认行为。