Rails - Dec 2007 - Validation order when mixing callbacks and validates_format

I posted this question the other day, but it was pretty late so I think
I wrote a bunch of gibberish. So let me try it now that I''ve been
properly doused with caffeine. :)

The Problem: I''m using the "before_validation" callback to
modify an
attribute value on a particular model object before it gets validated.
I''m also using "validates_format_of" to do error checking on
that same
model attribute. If "before_validation" doesn''t happen before
"validates_format_of", Rails blows up.

Looking in my AWDWR book, it looks like when you call model.save(),
there is an order to validation:

before_validation
...
after_validation
...
before_save
before_create / before_update
INSERT / UPDATE OPERATION
...

However, when I try to create a new model object, it looks like
before_validation does not get called before "validates_format_of". My
assumption would be that the "validates_" helpers should before after
"before_validation", but this doesn''t seem to be correct.

Can anyone help me out with this? When does "validates_format_of" get
called in relation to "before_validation"?

Thanks,
kodama
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Can you post your before_validation code?

What actually blows up?  Can you also post the relevant lines from the
log?



On Dec 31, 4:51 pm, Old Echo
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> I posted this question the other day, but it was pretty late so I think
> I wrote a bunch of gibberish. So let me try it now that I''ve been
> properly doused with caffeine. :)
>
> The Problem: I''m using the "before_validation" callback
to modify an
> attribute value on a particular model object before it gets validated.
> I''m also using "validates_format_of" to do error
checking on that same
> model attribute. If "before_validation" doesn''t happen
before
> "validates_format_of", Rails blows up.
>
> Looking in my AWDWR book, it looks like when you call model.save(),
> there is an order to validation:
>
> before_validation
> ...
> after_validation
> ...
> before_save
> before_create / before_update
> INSERT / UPDATE OPERATION
> ...
>
> However, when I try to create a new model object, it looks like
> before_validation does not get called before
"validates_format_of". My
> assumption would be that the "validates_" helpers should before
after
> "before_validation", but this doesn''t seem to be
correct.
>
> Can anyone help me out with this? When does "validates_format_of"
get
> called in relation to "before_validation"?
>
> Thanks,
> kodama
> --
> Posted viahttp://www.ruby-forum.com/.
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brewpoo wrote:
> Can you post your before_validation code?
> 
> What actually blows up?  Can you also post the relevant lines from the
> log?
I am having this same problem.  It seems the before_validation isn''t 
working in mine:


    before_validation :normalize_phone_number

    validates_format_of     :number,       :with => /^[0-9]{10,15}$/

    protected

    def normalize_phone_number
      self.number.gsub(/-/,"").gsub(/ /,"")
    end


The object won''t save since it fails the validates_format_of since it 
never runs the before_validation.  I''m running Rails 2.1.0.

Any ideas?
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I just figured out what I was doing wrong.

I was using "gsub" instead of "gsub!"

now it is working fine
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I''m having the same problem.  I want to allow people to enter a value 
including a $ or £.  With this method, the value of the attribute in 
before_validation is zero if I enter a value with text (or a $) at the 
start.

So entering $1000 is turned into 0, before before_validation.

Any ideas?

Marli Ba wrote:
> brewpoo wrote:
>> Can you post your before_validation code?
>> 
>> What actually blows up?  Can you also post the relevant lines from the
>> log?
> 
> I am having this same problem.  It seems the before_validation
isn''t
> working in mine:
> 
> 
>     before_validation :normalize_phone_number
> 
>     validates_format_of     :number,       :with => /^[0-9]{10,15}$/
> 
>     protected
> 
>     def normalize_phone_number
>       self.number.gsub(/-/,"").gsub(/ /,"")
>     end
> 
> 
> The object won''t save since it fails the validates_format_of since
it
> never runs the before_validation.  I''m running Rails 2.1.0.
> 
> Any ideas?
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