Ruby on Railsで実装中にエラーが発生したので、メモしておきます。
エラー状況
deviseを使ってログインを実装しようとしたところ、userモデルを作成して確認しようとしサーバーにアクセスしたところ上記のエラーが出ました。
uninitialized constant HomeController
Rails.root: /myapp
Application Trace | Framework Trace | Full Trace
Routes
Routes match in priority from top to bottom
Helper HTTP Verb Path Controller#Action
Path / Url
Path Match
root_path GET /
home#index
refile_app_path /attachments
#
rails_service_blob_path GET /rails/active_storage/blobs/:signed_id/*filename(.:format)
active_storage/blobs#show
rails_blob_representation_path GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format)
active_storage/representations#show
rails_disk_service_path GET /rails/active_storage/disk/:encoded_key/*filename(.:format)
active_storage/disk#show
update_rails_disk_service_path PUT /rails/active_storage/disk/:encoded_token(.:format)
active_storage/disk#update
rails_direct_uploads_path POST /rails/active_storage/direct_uploads(.:format)
active_storage/direct_uploads#createルーティングを確認してみます。
% rails routes
Prefix Verb URI Pattern Controller#Action
root GET / home#index
refile_app /attachments #<Refile::App app_file="/Users/user/.bundle/ruby/2.6.0/refile-46b4178654e6/lib/refile/app.rb">
rails_service_blob GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs#show
rails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show
rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show
update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update
rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#createログイン画面など何もないですね。。。
ソースをみているとコントローラーがなかったので、コントローラーを作成します。
% rails g devise:controllers users
create app/controllers/users/confirmations_controller.rb
create app/controllers/users/passwords_controller.rb
create app/controllers/users/registrations_controller.rb
create app/controllers/users/sessions_controller.rb
create app/controllers/users/unlocks_controller.rb
create app/controllers/users/omniauth_callbacks_controller.rb
===============================================================================
Some setup you must do manually if you haven't yet:
Ensure you have overridden routes for generated controllers in your routes.rb.
For example:
Rails.application.routes.draw do
devise_for :users, controllers: {
sessions: 'users/sessions'
}
end
===============================================================================指示通り、routes.rbにRails.application.routes.draw do。。。。を記載します。
再度ルーティングを確認しました。
ちゃんとルーティングできていそうですね。
% rails routes
Prefix Verb URI Pattern Controller#Action
root GET / home#index
new_user_session GET /users/sign_in(.:format) users/sessions#new
user_session POST /users/sign_in(.:format) users/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) users/sessions#destroy
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
user_password PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
POST /users/password(.:format) devise/passwords#create
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
user_registration PATCH /users(.:format) devise/registrations#update
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
POST /users(.:format) devise/registrations#create
refile_app /attachments #<Refile::App app_file="/Users/user/.bundle/ruby/2.6.0/refile-46b4178654e6/lib/refile/app.rb">
rails_service_blob GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs#show
rails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show
rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show
update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update
rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#createでも今度も以下のようなエラーが出ました。
uninitialized constant HomeController
Rails.root: /myapp
Application Trace | Framework Trace | Full Trace
Routes
Routes match in priority from top to bottom
Helper HTTP Verb Path Controller#Action
Path / Url
Path Match
root_path GET /
home#index
new_user_session_path GET /users/sign_in(.:format)
users/sessions#new
user_session_path POST /users/sign_in(.:format)
users/sessions#create
destroy_user_session_path DELETE /users/sign_out(.:format)
users/sessions#destroy
new_user_password_path GET /users/password/new(.:format)
devise/passwords#new
edit_user_password_path GET /users/password/edit(.:format)
devise/passwords#edit
user_password_path PATCH /users/password(.:format)
devise/passwords#update
PUT /users/password(.:format)
devise/passwords#update
POST /users/password(.:format)
devise/passwords#create
cancel_user_registration_path GET /users/cancel(.:format)
devise/registrations#cancel
new_user_registration_path GET /users/sign_up(.:format)
devise/registrations#new
edit_user_registration_path GET /users/edit(.:format)
devise/registrations#edit
user_registration_path PATCH /users(.:format)
devise/registrations#update
PUT /users(.:format)
devise/registrations#update
DELETE /users(.:format)
devise/registrations#destroy
POST /users(.:format)
devise/registrations#create
refile_app_path /attachments
#
rails_service_blob_path GET /rails/active_storage/blobs/:signed_id/*filename(.:format)
active_storage/blobs#show
rails_blob_representation_path GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format)
active_storage/representations#show
rails_disk_service_path GET /rails/active_storage/disk/:encoded_key/*filename(.:format)
active_storage/disk#show
update_rails_disk_service_path PUT /rails/active_storage/disk/:encoded_token(.:format)
active_storage/disk#update
rails_direct_uploads_path POST /rails/active_storage/direct_uploads(.:format)
active_storage/direct_uploads#createルーティングに何か足りてないみたいですね。
よくみるとHomeControllerないやんけって言われてますね。
あ。。。
そもそもHomeControllerを作っていなかったです。。。
今までlocalhost:3000に接続してました。。。
localhost:3000/users/sign_upに接続してみます。
Showing /myapp/app/views/layouts/application.html.erb where line #9 raised:
undefined method `javascript_pack_tag' for #<#<Class:0x000055d71c5e49f0>:0x00007f0a7cb6d5b8>
Did you mean? javascript_path
javascript_tag
Extracted source (around line #9):
7
8
9
10
11
12
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
</head>
<body>
Rails.root: /myapp
Application Trace | Framework Trace | Full Trace
app/views/layouts/application.html.erb:9:in `_app_views_layouts_application_html_erb___3951240858885647082_69841509409880'application.html.erbのjavascript_pack_tagがないって怒られました。
調べましたがよくわからないので、削除しました。
これを消した。
<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>とりあえず画面が表示されました。
HomeControllerの作成
結局最初のエラーは解決していないので、HomeControllerを作って行きます。
以下のコマンドを実行します。
% rails g controller home index
create app/controllers/home_controller.rb
route get 'home/index'
invoke erb
create app/views/home
create app/views/home/index.html.erb
invoke test_unit
create test/controllers/home_controller_test.rb
invoke helper
create app/helpers/home_helper.rb
invoke test_unit
invoke assets
invoke js
create app/assets/javascripts/home.js
invoke css
create app/assets/stylesheets/home.cssこれでエラーが出なくなりました。
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