User with nested attributes and validations

user_example_with_nested_and_validations.rb

class User < ApplicationRecord
  RECENT_ORDER_DAYS = 3
  RECENT_VISITED_DAYS = 7
  
  devise :database_authenticatable, :recoverable, :rememberable, :trackable, :registerable
         
  has_many :orders
  has_one :user_request
  
  accepts_nested_attributes_for :user_request, allow_destroy: true
  
  validates :name, presence: true
  validates :email, presence: true, uniqueness: true, format: { with: /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i }
  validates :phone, uniqueness: true, allow_blank: true
  validates :password, presence: true
end