Rails - Jul 2007 - ActiveRecord Warnings plugin: Problem when extending ActiveRecord::Base

Hi everyone.

I''m trying to make something cool with the ActiveRecord, it consists
in adding the feature of warnings to it.
for example:

class Person < ActiveRecord::Base
  should_warn_presence_of :name
end
>> p = Person.new
>> p.save
=> false
>> p.warned?
=> true
>> p.warnings.on(:name)
=> ''should not be blank''
>> p.accept_warnings
>> p.save
=> true

It makes the warning about an attribute, and the only way to save it
is that you confirm that you accept the warnings.

When I''m trying to overwrite the validation functionality to handle
the warnings and the validations of the model... the overwrite doesn''t
work.

I imagine that this is  happening because they use the
"alias_method_chain :save, :validation" on the Validation module,

when I try to do this in a plugin to change the behavior of this
method

module ActiveRecord
  module Validations
    def save_with_validation(perform_validation = true)
      # code to handle the warnings
    end
  end
end

it doesn''t get overwritten.

Maybe some dark magic is going on in the save_with_validation and the
alias_method_chain.

Anyone has an idea?
thanks in advance
PD: if someone wants to see the code,  pastie can help
Roman.-


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When I execute the @person.save_with_validation, it works like a
charm, but no when I invoke @person.save

probably there are to many alias_method_chain on the save method that
maintains a reference to the old method of save_with_validation. Does
that makes sense?

Roman Gonzalez wrote:
> Hi everyone.
>
> I''m trying to make something cool with the ActiveRecord, it
consists
> in adding the feature of warnings to it.
> for example:
>
> class Person < ActiveRecord::Base
>   should_warn_presence_of :name
> end
>
> >> p = Person.new
> >> p.save
> => false
> >> p.warned?
> => true
> >> p.warnings.on(:name)
> => ''should not be blank''
> >> p.accept_warnings
> >> p.save
> => true
>
> It makes the warning about an attribute, and the only way to save it
> is that you confirm that you accept the warnings.
>
> When I''m trying to overwrite the validation functionality to
handle
> the warnings and the validations of the model... the overwrite
doesn''t
> work.
>
> I imagine that this is  happening because they use the
> "alias_method_chain :save, :validation" on the Validation module,
>
> when I try to do this in a plugin to change the behavior of this
> method
>
> module ActiveRecord
>   module Validations
>     def save_with_validation(perform_validation = true)
>       # code to handle the warnings
>     end
>   end
> end
>
> it doesn''t get overwritten.
>
> Maybe some dark magic is going on in the save_with_validation and the
> alias_method_chain.
>
> Anyone has an idea?
> thanks in advance
> PD: if someone wants to see the code,  pastie can help
> Roman.-

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