Activeadmin渲染'new'给出在尝试覆盖create controller方法时找不到没有id的User

Question

我正在尝试在activeadmin中创建一个页面，用户可以进入该页面并创建新的用户帐户。

我正在使用下面的代码覆盖我的用户模型的默认创建方法。

当我尝试渲染Couldn't find User without an ID页面时，我收到错误new。

尝试重新渲染new动作时，为什么会出现此错误？

ActiveAdmin.register User do

  permit_params do
    permitted = [:email, :encrypted_password]
    permitted << :admin if current_user.is_admin?
    permitted
  end

  # We're overriding the new and edit controller methods to properly create users with devise. Otherwise the passwords don't get encrypted
  controller do

      def create
        user = User.new
        user.name = params[:user][:name]
        user.email = params[:user][:email]
        user.admin = params[:user][:admin]
        user.password = params[:user][:encrypted_password]
        user.password_confirmation = params[:user][:encrypted_password]

        if user.save
          redirect_to admin_user_path(user)
        else
          flash.now[:error] = user.errors.full_messages
          render 'new'     # THIS CAUSES THE ERROR "Couldn't find User without an ID"
          #redirect_to new_admin_user_path # This redirect works just fine
        end
      end

    end

end

日志：

Started GET "/admin/users/new" for 127.0.0.1 at 2014-03-09 21:34:35 -0500
Processing by Admin::UsersController#new as HTML
  User Load (0.4ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
  Rendered /Users/tomcaflisch/.rvm/gems/ruby-2.1.1@myapp/bundler/gems/active_admin-739b93bf9d22/app/views/active_admin/resource/new.html.arb (31.1ms)
Completed 200 OK in 37ms (Views: 34.1ms | ActiveRecord: 0.4ms)


Started GET "/admin/users/new" for 127.0.0.1 at 2014-03-09 21:34:42 -0500
Processing by Admin::UsersController#new as HTML
  User Load (0.2ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
  Rendered /Users/tomcaflisch/.rvm/gems/ruby-2.1.1@myapp/bundler/gems/active_admin-739b93bf9d22/app/views/active_admin/resource/new.html.arb (32.7ms)
Completed 200 OK in 60ms (Views: 35.4ms | ActiveRecord: 4.3ms)


Started POST "/admin/users" for 127.0.0.1 at 2014-03-09 21:34:44 -0500
Processing by Admin::UsersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"Aa6TBt0LADDcKAHs+gFokQroSVgTnxtlgLwzvCovIcs=", "user"=>{"name"=>"", "email"=>"", "encrypted_password"=>"[FILTERED]", "admin"=>"0"}, "commit"=>"Create User"}
  User Load (0.6ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
   (0.2ms)  BEGIN
   (0.2ms)  ROLLBACK
  Rendered /Users/tomcaflisch/.rvm/gems/ruby-2.1.1@myapp/bundler/gems/active_admin-739b93bf9d22/app/views/active_admin/resource/new.html.arb (14.6ms)
Completed 500 Internal Server Error in 25ms

ActiveRecord::RecordNotFound - Couldn't find User without an ID:

Answer 1

我在这里比赛有点晚了但是碰到了这个。使用@user而不是user。

Answer 2

我遇到了这个问题，还没有找到解决方案。如果有人发现了什么，我会很高兴听到它。

由于@Catfish已经在他的代码中显示为当前的解决方法，我正在使用redirect_to

redirect_to new_admin_[resource]_path

代替

render :new

可悲的是，这样一来，用户的所有输入都会丢失

render :new

将是首选的解决方案

Answer 3

我遇到了一些问题，我的解决方案是这样的：

if user.save
  # DO YOUR JOB
else
  flash.now[:error] = user.errors.full_messages
  @resource = User.new(permitted_params)
  render template: 'active_admin/resource/new'
end

只需根据需要调整@resource的初始化。这个解决方案适用于我在ActiveAdmin处于提交参考'1713ec9cb43a'的状态，不知道它如何与当前/最后版本一起工作。

Answer 4

如果有人还在看这个，那么adysson的回答对我很有帮助。

if user.save
  # DO YOUR JOB
  redirect_to admin_user_path(user)
else
  @resource = user
  render :new
end

这样做会在输入字段下显示资源错误而不是flash消息。