First than all I want to thanks you for the help, really appreciate it.
I have a question regarding the solution proposed. I also have a unique key
in the database in order to avoid race conditions.
That is the reason for which I was thinking on setting nil when an blank
String is set, probably should said this before (apologize for that).
Would this solution, validates_uniqueness_of :email, :if => proc {|email|
!email.blank? }, work or it will just avoid the application level validation
but still crash with and error trying to insert a duplicate value on the
database?
In case it doesn't work, what would you recommend?
Thanks again.
On Fri, Jul 22, 2011 at 12:54 PM, Fernando Almeida <
[email protected]> wrote:
> Excuse me, i dont remembered the exact syntax.
>
> I looked my code now, i use that way
>
>
> :if => proc {|r| !r['email'].blank?}
>
> Thanks Tom.
>
>
>
> 2011/7/22 Tom Meinlschmidt <[email protected]>
>
>>
>> this is wrong
>>
>> as in
>> > validates_uniqueness_of :email, :if => proc {|email| !email.blank? }
>>
>> the |email| in proc will return object of record (not the attribute), so
>> you hav eto use :if => proc {|r| !r.email.blank?}
>>
>> tom
>>
>> On Jul 22, 2011, at 17:39 , Fernando Almeida wrote:
>>
>> > You can use
>> > validates_uniqueness_of :email, :if => proc {|email| !email.blank? }
>> >
>> > Search for conditional validations for more info.
>> >
>> >
>> >
>> > 2011/7/22 Piter Fcbk <[email protected]>
>> > I have a model with a non obligatory field that must be unique. The code
>> looks like this:
>> >
>> > class Person < ActiveRecord::Base
>> > ...
>> > validates :email,
>> > :uniqueness => { :case_sensitive => false },
>> > :length => { :maximum => 128 },
>> > :email_format => true,
>> > :allow_nil => true
>> > ...
>> > end
>> >
>> > When the form is submitted, if the email text field is empty, and empty
>> string is set as email to the Person object. The problem comes when trying
>> to create next person with no email since its storing "" instead of nil.
>> > In order to solve this I want to store nil for the empty string (for
>> this field only).
>> >
>> > Should I do the check and set on the controller or in the model? I would
>> go for the model, but I'm open to suggestions.
>> > In case its done in the model, should be done by overriding the
>> attribute setter or using a call back triggered by .save like before_save?
>> >
>> > Thanks for the help
>> >
>> > --
>> > You received this message because you are subscribed to the Google
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>> >
>> >
>> >
>> > --
>> > Fernando Almeida
>> > www.fernandoalmeida.net
>> >
>> > --
>> > You received this message because you are subscribed to the Google
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>> --
>>
>> ===============================================================================
>> Tomas Meinlschmidt, MS {MCT, MCP+I, MCSE, AER}, NetApp Filer/NetCache
>>
>> www.meinlschmidt.com www.maxwellrender.cz www.lightgems.cz
>>
>> ===============================================================================
>>
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>>
>
>
> --
> Fernando Almeida
> www.fernandoalmeida.net
>
> --
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>
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