Date_select and date validation


I’ve put together a simple form that contains among other things a

<%= date_select(:user, :dob, :order => [:day, :month, :year],
:start_year => 1900, :end_year => %>

In my controller I have some code to create a user entity from the
parameters posted up from the form, like so:

parameters: {“user”=>{“dob(1i)”=>“2006”, “dob(2i)”=>“2”,

@user =[:user])

As if by magic Rails will convert dates like 02/31/2006 into 03/03/2006
so at the model level ‘user.dob’ => ‘03/03/2006’.

Is there a way to switch off this behaviour? In my opinion, an invalid
date shouldn’t result in a valid one being created.