Rails - Apr 2012 - validating a date range based on current object's attributes

Hey all,

I look at the rails documentation validation helpers:

http://api.rubyonrails.org/classes/ActiveModel/Validations/HelperMethods.html

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.

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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On Apr 23, 6:46 am, John Merlino <stoici...-YDxpq3io04c@public.gmane.org>
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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yeah i was using rails 2 thanks for response

On Apr 22, 10:53 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Apr 23, 6:46 am, John Merlino
<stoici...-YDxpq3io04c@public.gmane.org> 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, thatobjectinstance 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 thedatethey entered is between
> > dates theobjectwas 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'': Anobjectwith
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, "Anobjectwith 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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