On Jun 19, 2011, at 2:43 PM, Mauro wrote:

> On 19 June 2011 13:43, Bill Felton <[email protected]> wrote:
>> 
>> On Jun 19, 2011, at 7:23 AM, Mauro wrote:
>> 
>>> In the model I have:
>>> 
>>> validates :square_meters_public_land, :barrier_meters, :numericality
>>> => { :greater_than_or_equal_to => 0 }, :allow_nil => true
>>> 
>>> but if, in the field, on create, I don't insert a value I have the
>>> error "field is not a number".
>> 
>> 
>> Include the :allow_blank option if the fields are not required.
>> I generally think about this in terms of "specifying a validation always 
>> includes :required; if that's not what I want, I have to include 
>> :allow_blank".
> 
> That's ok, they are numeric fields I thought that allow_nil should be ok.

I would have expected :allow_nil to work, but apparently it's giving problems?  
FWIW, I always tend to think in terms of :allow_blank rather than :allow_nil.  
Perhaps an artifact of my years in Smalltalk?
If :allow_nil isn't working, as I gather from the posts that appeared before 
mine (after I posted, but long before mine showed up), have you tried 
:allow_blank?  Does that work better, worse, or no different?

regards,
Bill

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