フロントエンドプレイアブル

app/models/user.rb

@@ -0,0 +1,15 @@
+class User < ApplicationRecord
+  has_secure_password
+
+  validates :username, presence: true, length: { minimum: 3, maximum: 50 }
+  validates :email, presence: true, 
+                    uniqueness: { case_sensitive: false },
+                    format: { with: URI::MailTo::EMAIL_REGEXP }
+  validates :password, length: { minimum: 6 }, if: -> { new_record? || !password.nil? }
+
+  before_save { self.email = email.downcase }
+
+  def admin?
+    admin
+  end
+end