how to validate a form field sequentially

First, sorry for my English :S ..

Hi! I've searched about my problem into the forum but I didn't find any
post.
When I fill, for example, an email field my model validates the
presence, uniqueness, max-length (128) and format (a regular
expression).
If a user doesn't fill that field, the validation returns two messages:
  - The message about the field is blank (yeeeee).
  - The message about the field haven't the correct format (buuuu).
I only want to show the first message. Is there any way to do the
validation sequentially and stop when a validation doesn't be correct?
an example: first => presence, second => format, third => max-length,
fourth => uniqueness..

Last, sorry for my English :S ..
Thanks!

Luis

Yes, validating format only when field has a value:

ex.

validates_format_of :field, :with => “xxxx”, :allow_blank => true

:allow_nil - If set to true, skips this validation if the
attribute is nil (default is false)

:allow_blank - If set to true, skips this validation if the
attribute is blank (default is false)

or

validates_format_of :field, :with => “xxxx”, :if =>
Proc.new{|record| !record.field.blank? }

but the first one is better (allow_blank), with the last one u can make
a validation based on more than one field…

Hope this helps…

Amazing! thanks Gianluca :DD!!

Luis

Gianluca Tessarolo wrote: