[RUBY] [Rails] Initial setting of user-created login with devise, devise_token_auth

When creating a new user model

devise settings


$ rails g devise:install
      create  config/initializers/devise.rb
      create  config/locales/devise.en.yml


Rails.application.routes.draw do

  devise_for :users, :controllers => {
    :registrations => 'users/registrations',
    :sessions => 'users/sessions'

  devise_scope :user do
    get "sign_in", :to => "users/sessions#new"
    get "sign_out", :to => "users/sessions#destroy"
devise_for: model name Automatically set the routing required for authentication

devise_token_auth settings


$ rails g devise_token_auth:install User auth
      create  config/initializers/devise_token_auth.rb
      insert  app/controllers/application_controller.rb
        gsub  config/routes.rb
      create  db/migrate/20200919181950_devise_token_auth_create_users.rb
      create  app/models/user.rb
$ rails db:migrate
User ... Model name
auth ... Path to mount authentication routing


Rails.application.routes.draw do
  mount_devise_token_auth_for 'User', controllers: {
    registrations: 'users'

devise controller

$ 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

If you already have a User model

Tweak the migration content

class DeviseTokenAuthCreateUsers < ActiveRecord::Migration[6.0]
  def change

    change_table(:users) do |t|
      ## Required
      t.string :provider, :null => false, :default => "email"
      t.string :uid, :null => false, :default => ""

      ## Database authenticatable
      t.string :encrypted_password, :null => false, :default => ""

      ## Recoverable
      t.string   :reset_password_token
      t.datetime :reset_password_sent_at
      t.boolean  :allow_password_change, :default => false

      ## Rememberable
      t.datetime :remember_created_at

      ## Trackable
      t.integer  :sign_in_count, default: 0, null: false
      t.datetime :current_sign_in_at
      t.datetime :last_sign_in_at
      t.string   :current_sign_in_ip
      t.string   :last_sign_in_ip

      ## Confirmable
      t.string   :confirmation_token
      t.datetime :confirmed_at
      t.datetime :confirmation_sent_at
      t.string   :unconfirmed_email # Only if using reconfirmable

      ## Lockable
      # t.integer  :failed_attempts, :default => 0, :null => false # Only if lock strategy is :failed_attempts
      # t.string   :unlock_token # Only if unlock strategy is :email or :both
      # t.datetime :locked_at

      ## User Info
      # t.string :name
      t.string :nickname
      t.string :image
      # t.string :email

      ## Tokens
      t.text :tokens

      # t.timestamps

    add_index :users, :email,                unique: true
    add_index :users, [:uid, :provider],     unique: true
    add_index :users, :reset_password_token, unique: true
    add_index :users, :confirmation_token,   unique: true
    # add_index :users, :unlock_token,       unique: true

Two things to note

  1. Make it change_table (: users). (Originally create_table)
  2. Comment out existing columns

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