railsにて新規登録を実装を試みたが、NoMethodError in Users#indexのエラーが出る。

Question

以下がコードです

user.rb

class User < ApplicationRecord
    has_secure_password
    validates :name, {presence: true}
    validates :email, {presence: true, uniqueness: true}
end

routes.rb

Rails.application.routes.draw do
  root 'users#index'
  namespace :admin do
  resources:users
end
  resources:posts
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

users_controller.rb

class UsersController < ApplicationController
  def index
    @users = User.all
  end
  def create
    @users = User.new(user_params)
    @user.save
    redirect_to 'posts#index'
  end
  
  private
  def user_params
    params.require(:user).permit(:name,:email,:admin,:password,:password_confirmation)
  end
end

index.html.erb

<h1>新規登録</h1>
<%= link_to 'トップへ',posts_path %>
<%= form_with model:[:admin, @user],local:true do |f| %>
  <%= f.text_field :name %>
  <%= f.text_field :email %>
  <%= f.cheak_box :admin,class: 'form-check-input' %>
  <%= f.text_field :password%> 
  <%= f.text_field :password_confirmation%> 
  <%= f.submit %>
<% end %>

20190702021155_add_admin_to_users.rb

class CreateUsers < ActiveRecord::Migration[5.0]
  def change
    create_table :users do |t|
      t.string :name, null:false
      t.string :email, null:false
      t.string :password_digest, null:false

      t.timestamps
      t.index :email, unique:true
    end
  end
end

20190703021554_add_image_to_post.rb

class AddAdminToUsers < ActiveRecord::Migration[5.0]
  def change
   add_column :users, :admin, :boolean, default: false
  end
end

index.html.erbの<%= form_with model:[:admin, @user],local:true do |f| %>にエラーが出ます
よろしくお願いします。

Answer 1

index.html.erbの<%= form_with model:[:admin, @user],local:true do |f| %>にエラーが出ます よろしくお願いします。

とありますが、エラーメッセージでは
<%= form_for model:[:admin, @user],local:true do |f| %>
になっています。
form_with だとどうなりますか？

Comments

[Aokichingo]

ダメでした。画像は更新しています。すいません。

[winterboum]

Mugheartさんが Railsのversionを懸念されてますが、versionは？

Answer 2

NoMethodError in Users#index　にはどの 名前 が、なのかの情報も付いていると思います。質問でそれを落とすと解決が長引きます。

password がないと言われてますね、多分。
Userには passwrd も password_confermation もないと思います。
ユーザ登録画面とかパスワード変更画面とかに出てくるだけ。

db/schema.rb そみるとUserにどういう項目があるかわかりますから、そこにあるもの、
もしくは、Userモデルで定義したmethodなど
である必要があります

Comments

[Aokichingo]

エラーメッセージを載せたので見てください

Answer 3

Mugheatさんの指摘の他に気になるのが　@userの単数形と複数形の使い分けがおかしいところがあります。
単数形複数形は厳密に使い分けて下さい。

Railsシステムが、単複で動作が変わることがあります。
codeを読む人間が勘違いします。

今回は後者ですが。

例えばここ、間違いですよね

  def create
    @users = User.new(user_params)
    @user.save
    redirect_to 'posts#index'
  end

Comments

[Aokichingo]

@usersから@userに変えましたがダメです。

Answer 4

<%= form_with model:[:admin, @user],local:true do |f| %>

の@userってのはどこで用意されてるんですか？

質問が編集されたので回答を変えます。

とはいえ、↑の問題にはそのうちぶつかるかと思います。

form_withはRails5.1+で使えるヘルパーです。
おそらくRailsのバージョンが足りてないのではないでしょうか。

Comments

[Aokichingo]

コントローラーで　@user = User.newと入れていますが違いますか？

[rhiroe]

def index
@users = User.all
end

どこの話でしょうか...。

[Aokichingo]

def index
@users = User.all
end
です。すいません。

[Aokichingo]

gem 'rails', '~> 5.0.0'をgem 'rails', '~> 5.2.3'に変更し
bundle install rails
rails -v
Rails 5.2.3
になったが

ec2-user:~/environment/app (master) $ rails s
=> Booting Puma
=> Rails 5.2.3 application starting in development
=> Run `rails server -h` for more startup options
Exiting
Traceback (most recent call last):
73: from bin/rails:4:in `<main>'
72: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
71: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
70: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
69: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
68: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
67: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
66: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
65: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
64: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands.rb:18:in `<main>'
63: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/command.rb:46:in `invoke'
62: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/command/base.rb:65:in `perform'
61: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
60: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
59: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
58: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in `perform'
57: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:142:in `tap'
56: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:147:in `block in perform'
55: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:51:in `start'
54: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:89:in `log_to_stdout'
53: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/server.rb:354:in `wrapped_app'
52: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/commands/server/server_command.rb:27:in `app'
51: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/server.rb:219:in `app'
50: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/server.rb:319:in `build_app_and_options_from_config'
49: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/builder.rb:40:in `parse_file'
48: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/builder.rb:49:in `new_from_string'
47: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/builder.rb:49:in `eval'
46: from config.ru:in `<main>'
45: from config.ru:in `new'
44: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/builder.rb:55:in `initialize'
43: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.0.7/lib/rack/builder.rb:55:in `instance_eval'
42: from config.ru:3:in `block in <main>'
41: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:48:in `require_relative'
40: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
39: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
38: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
37: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
36: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
35: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
34: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
33: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
32: from /home/ec2-user/environment/app/config/environment.rb:5:in `<main>'
31: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/application.rb:361:in `initialize!'
30: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:60:in `run_initializers'
29: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
28: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
27: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
26: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `call'
25: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each'
24: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
23: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:415:in `each_strongly_connected_component_from'
22: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:415:in `call'
21: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:50:in `tsort_each_child'
20: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:50:in `each'
19: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:421:in `block in each_strongly_connected_component_from'
18: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
17: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:422:in `block (2 levels) in each_strongly_connected_component_from'
16: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
15: from /home/ec2-user/.rvm/rubies/ruby-2.6.3/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
14: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:61:in `block in run_initializers'
13: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `run'
12: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `instance_exec'
11: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/engine.rb:613:in `block in <class:Engine>'
10: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/engine.rb:613:in `each'
9: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/engine.rb:614:in `block (2 levels) in <class:Engine>'
8: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/engine.rb:656:in `load_config_initializer'
7: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/notifications.rb:170:in `instrument'
6: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.3/lib/rails/engine.rb:657:in `block in load_config_initializer'
5: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:285:in `load'
4: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
3: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:285:in `block in load'
2: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:54:in `load'
1: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:54:in `load'
/home/ec2-user/environment/app/config/initializers/new_framework_defaults.rb:21:in `<main>': undefined method `halt_callback_chains_on_return_false=' for ActiveSupport:Module (NoMethodError)

となり立ち上がりません。

[rhiroe]

Railsアプリケーション自体をアップデートする必要があります。
$ rails app:update
必要なところを上書き更新してください。