validates_format_of with condition

rubyonrails-talk
1

Hi, I am trying to validate the email format by using "validates_format_of". I have written a code like this:- "validates_format_of :email, :with=>/^[0-9a-zA-Z_][\w\.-]*[a-zA-Z0-9_]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/,                       :message => "is not valid" "

It is working fine, but in my application email id is not manadatory. So how should add the condition in this validator so that it will validate the email only when the email address is present.

Can anyone help me out?

Thanks, Tushar

2

Tushar Gandhi wrote:

Hi, I am trying to validate the email format by using "validates_format_of". I have written a code like this:- "validates_format_of :email, :with=>/^[0-9a-zA-Z_][\w\.-]*[a-zA-Z0-9_]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/,                       :message => "is not valid" "

It is working fine, but in my application email id is not manadatory. So how should add the condition in this validator so that it will validate the email only when the email address is present.

Can anyone help me out?

Thanks, Tushar

Have you considered :unless

3

:allow_nil => true

4

Hi,    Use allow_blank => true

5

validates_format_of :email, :with=>/^[0-9a-zA-Z_][\w\.-]*[a-zA-Z0-9_]@[a-zA-Z0-9][\w\.-]*[a-zA- Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/,                       :message => "is not valid", :unless => Proc.new { |your_model_name_or_any_variable_name_you_want| your_model_name_or_any_variable_name_you_want.email.blank?}

So, supposing your model is a User:

validates_format_of :email, :with=>/^[0-9a-zA-Z_][\w\.-]*[a-zA-Z0-9_]@[a-zA-Z0-9][\w\.-]*[a-zA- Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/,                       :message => "is not valid", :unless => Proc.new {|user| user.email.blank?}