Question

我正在尝试为每个用户创建一个展示页面作为个人资料页面。但是，我一直在使用未定义的方法`username＆＃39; for nil：当我尝试在视图中显示任何内容时，NilClass为错误消息。

我使用Devise来注册和存储用户信息。我的用户被称为＆＃34;艺术家＆＃34;。

/routes.rb

devise_for :artists, controllers: { sessions: "artists/sessions", passwords: "artists/passwords", registrations: "artists/registrations", confirmations: "artists/confirmations",  unlocks: "artists/unlocks"}
resources :artists, only: [:show, :index]

/artists_controller.rb

class ArtistsController < ApplicationController
 def show
  @artist = Artist.find(params[:id])
 end
end

/show.html.erb

<%= @artist.username %>

如果我尝试显示电子邮件，ID等，我会收到此错误

日志

Started GET "/artists/1" for 127.0.0.1 at 2015-01-04 14:00:47 -0500
Processing by ArtistsController#show as HTML
Parameters: {"id"=>"1"}
Rendered artists/show.html.erb within layouts/application (5.0ms)
Completed 500 Internal Server Error in 24ms

ActionView::Template::Error (undefined method `username' for nil:NilClass):
1: <div>
2:   <%= @artist.username %>
3: </div>
4: <div>
5:   <ul>
app/views/artists/show.html.erb:2:in `_app_views_artists_show_html_erb___67732
1755_70508328'


Rendered C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.1.8
/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (7.0ms)
Rendered C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.1.8
/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb
(4.0ms)
Rendered C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.1.8
/lib/action_dispatch/middleware/templates/rescues/template_error.html.erb within
rescues/layout (91.0ms)

Answer 1

如果您将ArtistsController嵌套到/artists中，要使路线正常工作，您需要使用

get 'artists/:id' => 'artists/artists#show', as: :artist

或

resources :artists, controller: 'artists/artists', only: [:show]

用Devise显示用户

1 个答案: