cPzBk1J4

1class User < ApplicationRecord
2  validates :email, uniqueness: true, unless: :gmail?
3  validates :email, :unique_gmail, if: :gmail?
4 
5  def unique_gmail
6    username, symbol, domain = email.partition '@'
7    email_without_periods = "#{username.delete('.')}#{symbol}#{domain}"
8    duplicate = self.class.find_by email: email_without_periods
9    errors.add :email, "#{duplicate} has already been taken" if duplicate
10  end
11
12  private
13
14  def gmail?
15    email.ends_with? '@gmail.com'
16  end
17end