validate email format only if not blank Rails 3
Solution 1:
This should do the trick.
validates :email,:presence => {:message => "Your email is used to save your greeting."}, :allow_blank => true,:uniqueness => { :case_sensitive => false }
Use:allow_blank => true
or :allow_nil => true, :if => :email?
edit: fix typo.
Solution 2:
You can write custom validation function:
class Model < ActiveRecord::Base
validate :check_email
protected
def check_email
if email.blank?
validates :email, :presence => {:message => "Your email is used to save your greeting."}
else
validates :email,
:email => true,
:uniqueness => { :case_sensitive => false }
end
end
end
or divide your validator into 2 separate validators with conditions:
validates :email,
:presence => {:message => "Your email is used to save your greeting."},
:if => Proc.new {|c| c.email.blank?}
validates :email,
:email => true,
:uniqueness => { :case_sensitive => false }
:unless => Proc.new {|c| c.email.blank?}
Solution 3:
you can validate format if no precense required :allow_nil => true