Today i came to point where nested validation could make my code more
DRY. My question is, if anything like this planed?
Example:
Maybe you only want to display different error messages if an attribute
is blank or has the wrong format.
validates_presence_of :email_address, :message => 'Give me an address!'
validates_format_of :email_address, :with => /[EMAIL PROTECTED],}/,
:message => 'Something's wrong with your address!'
This will give both messages if email_address is blank. The common way
to get the second message only if email_address is not blank would be
something like this:
validates_presence_of :email_address,
:message => 'Give me an address!'
validates_format_of :email_address,
:with => /[EMAIL PROTECTED],}/,
:message => 'Something's wrong with your email!',
:if => '!record.email.blank?'
This could lead into multiple repetitions if you have more complex
conditions or multi-level nested validations. Couldn't a nicer and
simpler syntax be:
validates_presence_of(:email, :message => 'Give me an address!') do
validates_format_of :email, :with => /[EMAIL PROTECTED],}/,
:message => 'Something's wrong with your email!'
end
Maybe i missed something that already exists. Maybe this approach is not
convertible. What do you think about this block syntax?
--
Norman Timmler
http://blog.inlet-media.de
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