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[gem] Devise

Install​

# Gemfile
# Flexible authentication solution for Rails with Warden
gem 'devise', '~> 4.3'

Usage​

# in controller
class Admin::BaseController < ApplicationController
  before_action :authenticate_user!

  layout 'admin/layouts/application'
end
<!-- in view -->
<%= link_to destroy_user_session_path, method: :delete, class: 'nav-link' do %>
  <i class="fas fa-sign-out-alt"></i><span class="ml-1">登出</span>
<% end %>

設定可接收的註冊資料（參數）​

# app/controllers/application_controller.rb

class ApplicationController < ActionController::Base
  # Add additional parameters for Devise Model
  before_action :configure_permitted_parameters, if: :devise_controller?

  protected
    def configure_permitted_parameters
      devise_parameter_sanitizer.permit(:sign_up, keys: %i(name title birthday sex phone timezone))
      devise_parameter_sanitizer.permit(:account_update, keys: %i(name title birthday sex phone timezone))
    end

    def redirect_to_unauthorized
      redirect_to unauthorized_path
      return
    end
end

Example​