validation - Rails ActiveRecord: validate single attribute -

if there way can validate single attribute in rails?

something like:

ac_object.valid?(attribute_name) 

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i'm gonna use ajax validation of particular model fields. moving these validations javascript makes code ugly.

you can implement own method in model. this

def valid_attribute?(attribute_name)   self.valid?   self.errors[attribute_name].blank? end 

or add activerecord::base