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...
> I've tought a solution, when it validates, it only takes the first error
> message:
>
> if obj.errors.on(:email)
> errMsg << obj.errors.on(:email)[0]
> end
>
> Anybody knows a more elegant solution?
> greetings!
> Luis.
>
> Luis Sánchez wrote:
>
>> 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
>>
>
>
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