Rails - Jan 2006 - update_attribute and validations

Just in case it saves someone else the several hours of insanity I just 
went through, update_attributes will not save unless the model 
validations are satisfied, but update_attribute (the singular form) 
will save the attribute to the database even if the model validations 
would fail!

This appears to be a feature, not a bug 
(http://api.rubyonrails.com/classes/ActiveRecord/Base.html) although it 
is not mentioned in Agile Web Dev with Rails (page 221).

Regards,
Victor Grey

Wow, that is odd, you would think it would work the same as
update_attributes.  Or it least there would be a
update_attribute(name,value,validate) where validate is a boolean.

On 1/17/06, Victor Grey <victor@2idi.com> wrote:
>
> Just in case it saves someone else the several hours of insanity I just
> went through, update_attributes will not save unless the model
> validations are satisfied, but update_attribute (the singular form)
> will save the attribute to the database even if the model validations
> would fail!
>
> This appears to be a feature, not a bug
> (http://api.rubyonrails.com/classes/ActiveRecord/Base.html) although it
> is not mentioned in Agile Web Dev with Rails (page 221).
>
> Regards,
> Victor Grey
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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On 1/17/06, Paul Barry <mail@paulbarry.com> wrote:
> Wow, that is odd, you would think it would work the same as
> update_attributes.  Or it least there would be a
> update_attribute(name,value,validate) where validate is a
> boolean.
It was made specifically for updating things such as boolean fields. 
If you want to update more fields without validation, you can do this:

@foo.attributes = params[:foo]
@foo.save(false)

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rick
http://techno-weenie.net