Hi Grar,
If you have a User model where you want to use some shared validations, you
could create a module like this – in lib/my_email_validations.rb:
module MyEmailValidations
def self.included(base)
base.validates_presence_of :email
base.validates_length_of :email, :minimum => 6
base.validate :email_must_be_from_valid_provider
end
# example of a custom validator
def email_must_be_from_valid_provider
errors.add :email, "must be from a valid provider" if
email !~ /@gmail.com$/
end
end
and in your User model, include them like this:
class User < ActiveRecord::Base
include MyEmailValidations
end
Does this solve your problem?
/Lasse
2010/4/1 Grary <[email protected]>
> Hi,
>
> Despite close reading of Matz's Ruby book and Agile Web Dev. w. Rails,
> I can't figure out how to tackle the challenge of sharing validation
> code across models with attributes in common.
>
> In each of my models I'd like to validate the shared attributes with a
> custom validator that includes Rails ActiveRecord::Validations class
> methods and some of my own validations. My problem is 1) I don't know
> how to pass attribute references to my special method and 2) (mundane)
> I can't successfully call any ActiveRecord::Validations class methods
> from within my custom method.
>
> A bit of garbage here, I know, but any thoughts? Is this kind of
> problem handled by use of certain gems?
>
> Thanks,
>
> Grar
>
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