我一直在努力解决这个问题。我有一个 Rails4/Devise 3.1 应用程序，系统中有两个用户：
- 毕业生
- 雇主
一个设计用户可以通过多态:profile关联成为毕业生或雇主。我让毕业生通过/graduate/sign_up路径和雇主通过/employer/sign_up路径注册，这两条路径都指向相同的/views/devise/registrations/new.html.erb视图（因为他们的注册表单几乎相同 - 电子邮件和密码）。一切正常，除非出现验证错误，RegistrationsController#create.respond_with resource总是将两种用户类型重定向到/users路径，我需要将它们重定向回它们最初来自的位置，例如/graduate/sign_up或/employer/sign_up分别。我尝试用 替换respond_with，redirect_to但最终丢失了带有相关错误消息的资源对象。关于如何做到这一点的任何想法？
这些是我的模型：
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
belongs_to :profile, polymorphic: true
end
class Graduate < ActiveRecord::Base
has_one :user, as: :profile
end
class Employer < ActiveRecord::Base
has_one :user, as: :profile
end
注册控制器：
class RegistrationsController < Devise::RegistrationsController
def create
build_resource sign_up_params
user_type = params[:user][:user_type]
# This gets set to either 'Graduate' or 'Employer'
child_class_name = user_type.downcase.camelize
resource.profile = child_class_name.constantize.new
if resource.save
if resource.active_for_authentication?
set_flash_message :notice, :signed_up if is_navigational_format?
sign_up(resource_name, resource)
respond_with resource, :location => after_sign_up_path_for(resource)
else
set_flash_message :notice, :"signed_up_but_#{resource.inactive_message}" if is_navigational_format?
expire_session_data_after_sign_in!
respond_with resource, :location => after_inactive_sign_up_path_for(resource)
end
else
clean_up_passwords(resource)
respond_with resource
end
end
end
注册视图（毕业生和雇主都相同）：
<h2>Sign up</h2>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div><%= f.label :email %><br />
<%= f.email_field :email, :autofocus => true %></div>
<div><%= f.label :password %><br />
<%= f.password_field :password %></div>
<div><%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation %></div>
<%= hidden_field resource_name, :user_type, value: params[:user][:user_type] %>
<div><%= f.submit "Sign up" %></div>
<% end %>
<%= render "devise/shared/links" %>
这些是我的路线：
devise_for :users, :controllers => { :registrations => 'registrations' }
devise_scope :user do
match 'graduate/sign_up', to: 'registrations#new', user: { user_type: 'graduate' }, via: [:get]
match 'employer/sign_up', to: 'registrations#new', user: { user_type: 'employer' }, via: [:get]
end
root to: 'home#index'
rake 路线的输出；
$ rake routes
Prefix Verb URI Pattern Controller#Action
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
graduate_sign_up GET /graduate/sign_up(.:format) registrations#new {:user=>{:user_type=>"graduate"}}
employer_sign_up GET /employer/sign_up(.:format) registrations#new {:user=>{:user_type=>"employer"}}
root GET /