with_options

with_options

class User < ActiveRecord::Base
  with_options if: :should_validate_password? do |user|
    user.validates_presence_of :password
    user.format_of :password, with: /^[^\s]+$/
  end
  
  attr_accessor :updating_password
  
  def should_validate_password?
    updating_password || new_record?
  end
end

class Account < ActiveRecord::Baase
  with_options dependent: :destroy do |acc|
    acc.has_many :customers
    acc.has_many :products
    acc.has_many :invoices
    acc.has_many :expenses
  end
end