Rails core - Jul 2012 - Virtual attribute

Periodically i need to use *attr_accessor* in models, which will be used in 
views like *date_select*. In this case will be raised
error<https://github.com/rails/rails/blob/master/activerecord/lib/active_record/attribute_assignment.rb#L166>
because
of klass
method<https://github.com/rails/rails/blob/master/activerecord/lib/active_record/attribute_assignment.rb#L171>
call
for nil.

What do you all think about adding attar_virtual method in ActiveModel to 
solve this problem?

Variants:
1) Columns hash <https://gist.github.com/3055907>
2) Struct <https://gist.github.com/3055890>
3) Class <https://gist.github.com/3055931>
and more.

References:
http://stackoverflow.com/questions/4971523/attr-accessor-for-a-date-and-problems-using-select-date
http://stackoverflow.com/questions/5463337/in-rails-is-there-a-way-to-specify-a-type-youd-like-an-attr-accessor-to-be-an
...

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I like the idea because I''ve also suffered with this problem before.

What about passing the class as the second argument like in serialize?

class Monkey < ActiveRecord::Base
    attr_virtual :birth_date, Date
end

On Thu, Jul 5, 2012 at 2:38 PM, Aleksey Magusev <lexmag@gmail.com> wrote:
> Periodically i need to use *attr_accessor* in models, which will be used
> in views like *date_select*. In this case will be raised
error<https://github.com/rails/rails/blob/master/activerecord/lib/active_record/attribute_assignment.rb#L166>
because
> of klass
method<https://github.com/rails/rails/blob/master/activerecord/lib/active_record/attribute_assignment.rb#L171>
call
> for nil.
>
> What do you all think about adding attar_virtual method in ActiveModel to
> solve this problem?
>
> Variants:
> 1) Columns hash <https://gist.github.com/3055907>
> 2) Struct <https://gist.github.com/3055890>
> 3) Class <https://gist.github.com/3055931>
> and more.
>
> References:
>
>
http://stackoverflow.com/questions/4971523/attr-accessor-for-a-date-and-problems-using-select-date
>
>
http://stackoverflow.com/questions/5463337/in-rails-is-there-a-way-to-specify-a-type-youd-like-an-attr-accessor-to-be-an
> ...
>
> --
> You received this message because you are subscribed to the Google Groups
> "Ruby on Rails: Core" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/rubyonrails-core/-/73EswiuEVy0J.
> To post to this group, send email to rubyonrails-core@googlegroups.com.
> To unsubscribe from this group, send email to
> rubyonrails-core+unsubscribe@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/rubyonrails-core?hl=en.
>
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