Rails - Nov 2008 - how can I leverage Validation framework for input parameter collection when I don't have/need to persist to database (i.e. no activerecord table) ???

Hi,

How can I leverage Validation framework for input parameter collection
when I don''t have/need to persist to database (i.e. no activerecord
table) ???

I have a set of parameters I want to collect from a form that will be
used as input to a 2nd stage.  I want to collect the parameters and
use the Rails validations framework to assist here however how do I do
this when I don''t have a database table?  (i.e. I won''t have
an active
record model)?

Which is the most popular method for this, for example:

(a) I see there is an activerecord_base_without_table plugin
(http://agilewebdevelopment.com/plugins/activerecord_base_without_table)
- but it seems like a shame to have to jump into a plugin just to use
the validation framework no?

(b) another I see is
http://rorblog.techcfl.com/2008/04/02/custom-form-validations-without-activerecord/
  (http://validatable.rubyforge.org/)

(c) Is there a direct way to use the validation / activecontroller
framework without needing a plugin?

Thanks

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