名前でログイン時に起こる1 error prohibited this user from being saved: Email can't be blankの解決方法

Question

前提・実現したいこと

Ruby on Railsのdeviseを用いて名前でログイン出来る機能を
https://qiita.com/yuki82511988/items/73659af9d1049bd1b256というサイトを
参考に実装しようとしたのですが

Email can't be blankというエラーが出てログインできません。

発生している問題・エラーメッセージ

1 error prohibited this user from being saved:
Email can't be blank

ログインしようとした時
!明](83f1e0ca7a3e193f5eb38921087216c9.png)

Loginを押した後

sign upした時のターミナル

Started POST "/users" for 157.110.132.69 at 2021-12-10 00:36:03 +0000
Cannot render console from 157.110.132.69! Allowed networks: 127.0.0.0/127.255.255.255, ::1
   (0.4ms)  SELECT sqlite_version(*)
   (0.1ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by Devise::RegistrationsController#create as HTML
  Parameters: {"authenticity_token"=>"[FILTERED]", "user"=>{"name"=>"松尾芭蕉", "email"=>"2@2130", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"Sign up"}
  TRANSACTION (0.1ms)  begin transaction
  User Exists? (0.2ms)  SELECT 1 AS one FROM "users" WHERE "users"."email" = ? LIMIT ?  [["email", "2@2130"], ["LIMIT", 1]]
  User Create (0.3ms)  INSERT INTO "users" ("email", "encrypted_password", "name", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?)  [["email", "2@2130"], ["encrypted_password", "$2a$12$YzNfdnH1kwkhu38MSbyf5.4d4ovUoH68ONfQnud1xVV63fIIkzAga"], ["name", "松尾芭蕉"], ["created_at", "2021-12-10 00:36:03.811852"], ["updated_at", "2021-12-10 00:36:03.811852"]]
  TRANSACTION (3.7ms)  commit transaction
Redirected to https://0d54000a22584ba9b57703c7647c58ad.vfs.cloud9.us-east-1.amazonaws.com/users/4
Completed 302 Found in 293ms (ActiveRecord: 4.6ms | Allocations: 20407)


Started GET "/users/4" for 157.110.132.69 at 2021-12-10 00:36:04 +0000
Cannot render console from 157.110.132.69! Allowed networks: 127.0.0.0/127.255.255.255, ::1
Processing by UsersController#show as HTML
  Parameters: {"id"=>"4"}
  User Load (0.1ms)  SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ?  [["id", 4], ["LIMIT", 1]]
  ↳ app/controllers/users_controller.rb:5:in `show'
  Rendering layout layouts/application.html.erb
  Rendering users/show.html.erb within layouts/application
  Rendered users/show.html.erb within layouts/application (Duration: 4.5ms | Allocations: 964)
[Webpacker] Everything's up-to-date. Nothing to do
  User Load (0.2ms)  SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT ?  [["id", 4], ["LIMIT", 1]]
  ↳ app/views/layouts/application.html.erb:15
  Rendered layout layouts/application.html.erb (Duration: 55.5ms | Allocations: 10897)
Completed 200 OK in 82ms (Views: 57.5ms | ActiveRecord: 0.8ms | Allocations: 18101)

sign in時のターミナル

Started POST "/users" for 157.110.132.69 at 2021-12-10 00:37:38 +0000
Cannot render console from 157.110.132.69! Allowed networks: 127.0.0.0/127.255.255.255, ::1
   (0.4ms)  SELECT sqlite_version(*)
   (0.1ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by Devise::RegistrationsController#create as HTML
  Parameters: {"authenticity_token"=>"[FILTERED]", "user"=>{"name"=>"松尾芭蕉", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Log in"}
Unpermitted parameter: :remember_me
  Rendering layout layouts/application.html.erb
  Rendering devise/registrations/new.html.erb within layouts/application
  Rendered devise/shared/_error_messages.html.erb (Duration: 2.6ms | Allocations: 2769)
  Rendered devise/shared/_links.html.erb (Duration: 1.1ms | Allocations: 822)
  Rendered devise/registrations/new.html.erb within layouts/application (Duration: 8.9ms | Allocations: 6714)
[Webpacker] Everything's up-to-date. Nothing to do
  Rendered layout layouts/application.html.erb (Duration: 25.8ms | Allocations: 13836)
Completed 200 OK in 304ms (Views: 27.6ms | ActiveRecord: 0.6ms | Allocations: 26994)

sign in 時のターミナル
(Unpermitted parameter: :remember_meとあったのでapplication_controller.rbのconfigure_permitted_parametersにremember_meを追加後)

Started POST "/users" for 157.110.132.69 at 2021-12-10 00:39:41 +0000
Cannot render console from 157.110.132.69! Allowed networks: 127.0.0.0/127.255.255.255, ::1
   (0.4ms)  SELECT sqlite_version(*)
   (0.1ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by Devise::RegistrationsController#create as HTML
  Parameters: {"authenticity_token"=>"[FILTERED]", "user"=>{"name"=>"松尾芭蕉", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Log in"}
  Rendering layout layouts/application.html.erb
  Rendering devise/registrations/new.html.erb within layouts/application
  Rendered devise/shared/_error_messages.html.erb (Duration: 7.2ms | Allocations: 2769)
  Rendered devise/shared/_links.html.erb (Duration: 2.1ms | Allocations: 822)
  Rendered devise/registrations/new.html.erb within layouts/application (Duration: 20.5ms | Allocations: 6713)
[Webpacker] Everything's up-to-date. Nothing to do
  Rendered layout layouts/application.html.erb (Duration: 51.8ms | Allocations: 13835)
Completed 200 OK in 332ms (Views: 56.6ms | ActiveRecord: 0.4ms | Allocations: 26968)

該当のソースコード

user.rb

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable

  has_many :books, dependent: :destroy
  has_one_attached :profile_image

  
  def get_profile_image
    if profile_image.attached?
      profile_image
    else
      'sample-author1.jpg'
    end
  end
end

registrations/new.html.erb

<h2>Sign up</h2>

<%= form_with model: @user, url: user_registration_path, local: true do |f| %>
  <%= render "devise/shared/error_messages", resource: resource %>

  <div class="field">
    <%= f.label :name %><br/>
    <%= f.text_field :name, autofocus: true %>
  </div>

  <div class="field">
    <%= f.label :email %><br />
    <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
  </div>

  <div class="field">
    <%= f.label :password %>
    <% if @minimum_password_length %>
    <em>(<%= @minimum_password_length %> characters minimum)</em>
    <% end %><br />
    <%= f.password_field :password, autocomplete: "new-password" %>
  </div>

  <div class="field">
    <%= f.label :password_confirmation %><br />
    <%= f.password_field :password_confirmation, autocomplete: "new-password" %>
  </div>

  <div class="actions">
    <%= f.submit "Sign up" %>
  </div>
<% end %>

<%= render "devise/shared/links" %>

config/initializers/devise.rb(コードが多く、画像を投稿させていただきました。)

application_controller.rb

class ApplicationController < ActionController::Base
  before_action :configure_permitted_parameters, if: :devise_controller?

  def after_sign_in_path_for(resource)
    user_path(current_user.id)
  end

  private

   def configure_permitted_parameters
      devise_parameter_sanitizer.permit(:sign_up,keys:[:email,:remember_me])
    end
end

sessions/new.html.erb

<%= form_with model: @user, url: user_registration_path, local: true do |f| %>
   <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name, autofocus: true, autocomplete: "name" %>
  </div>

  <div class="field">
    <%= f.label :password %><br />
    <%= f.password_field :password, autocomplete: "current-password" %>
  </div>

  <% if devise_mapping.rememberable? %>
    <div class="field">
      <%= f.check_box :remember_me %>
      <%= f.label :remember_me %>
    </div>
  <% end %>

  <div class="actions">
    <%= f.submit "Log in" %>
  </div>
<% end %>

<%= render "devise/shared/links" %>

試したこと

1 ターミナルを確認した所Unpermitted parameter: :remember_meとあったのでapplication_controller.rbのconfigure_permitted_parametersにremember_meを追加

2 sign up時にemailが登録されてないと思い、ターミナルを確認したが問題解決には至らなかった

3 emailというカラムが存在してないと思い、schema.rbを確認した

補足情報（FW/ツールのバージョンなど）

windows10
Rails 6.1.4.1 (2019-04-16 revision 67580) [x86_64-linux]
ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-linux]

以上、よろしくお願いいたします。

Answer 1

Login のページが、実は Sign-up のページと判断されているようです。

sessions/new.html.erb の1行目

<%= form_with model: @user, url: user_registration_path, local: true do |f| %>

のパスが user_registration_path になっていますから。
これを、new_user_session_path (編集: user_session_pathの可能性が高い)か何かに置き換えるとどうでしょうか?

具体的なパス名は、環境依存です。bin/rails routes -g session (Rails 5+)を実行させて、お使いのアプリでのlogin用のパス名を確認してください。
(もし Rails 4ならばおそらく rake routes | grep session)

Comments

[garyoman]

教えていただいた部分をuser_session_pathに変えた所、
無事にログイン出来ました！

教えていただきありがとうございます！

[MasaSakano]

解決できてよかったです。
`user_session_path` が最も可能性高いですね。`new_user_session_path`は標準ではlogin画面表示のためのパスでした(失礼!)。その点につき、回答に追記しておきました(今後この回答を閲覧する人のために)。