problem with AR and 'virtual' multiparameter attributes.

rubyonrails-talk
1

Hello,

I have a model which I would like to have a 'virtual' date column. This column wouldn't exist in the database, but would exist for validation, etc. The data would be provided in the form of a date_select in the view. This produces a multiparameter attribute. My problem is that the 'execute_callstack_for_multiparameter_attributes' method in base.rb of ActiveRecord looks at the columns array to determine the 'class' (klass) to use when doing the multiparameter conversion. Since this column doesn't really exist nothing is found and an exception is thrown when trying to evaluate nil.klass.

I'm willing to provide a patch, but I am not what would be the best way to provide the type information. Any suggestions?

Thanks,

-James

2

Did you end up writing anything? Running into this problem myself and am handling it with the controller re-writing the params[:hash] as an "instant" fix.

I'll look into it as well if you haven't.

Mikel