On Apr 23, 6:46 am, John Merlino <stoici...@aol.com> wrote:
> Hey all,
>
> I look at the rails documentation validation helpers:
>
> http://api.rubyonrails.org/classes/ActiveModel/Validations/HelperMeth...
>
> It has this example:
>
> class Person < ActiveRecord::Base
> validates_inclusion_of :states, :in => lambda{ |person|
> STATES[person.country] }
> end
>
> So basically when you update a record, that object instance is passed
> into the lambda and validation occurs.
>
The ability to specify a lambda as a validates_inclusion_of target was
added in 3.x (not exactly sure which version - I think 3.1) and you're
using 2.3.10, which doesn't have this ability. You'll probably need to
write a custom validation, i.e. something along the lines of
validate :check_screening_date
def check_screening_date
if ...
errors.add(:screening, "screening must be between ...")
end
end
Fred
> I try to emulate same thing:
>
> class Subject < ActiveRecord::Base
> validates_inclusion_of :screening, :in => lambda { |subject|
> (subject.screened_on + 7.days)..(subject.screened_on + 14.days) }
> end
>
> So basically I just want to make sure the date they entered is between
> dates the object was screend.
>
> However, I get this error:
>
> .rvm/gems/ruby-1.8.7-p357/gems/activerecord-2.3.10/lib/active_record/
> validations.rb:908:in `validates_inclusion_of': An object with the
> method include? is required must be supplied as the :in option of the
> configuration hash (ArgumentError)
>
> Ok so the source code shows this line:
>
> enum = configuration[:in] || configuration[:within]
> 607:
> 608: raise(ArgumentError, "An object with the method include?
> is
> required must be supplied as the :in option of the configuration
> hash")
> unless enum.respond_to?("include?")
>
> Granted, a model instance does not have the include? method. So then
> why does the example in the rails documentation work and what can I do
> to emulate that?
>
> thanks for response
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