From: Tahura Chaudhry <tahura@...>
Date: 2008-06-14T06:03:28+09:00
Subject: validate a select (boolean)

I am using
Ruby Version: 1.8.4
Rails Version: 1.2.2

I have an issue regarding validation of a boolean field in my
applicaiton.

On the UI, I had to show a dropdown with options: "yes", "no" and ""
(blank)

My HTML view contains:

<%= select 'guest', 'attending', [['Yes', true], ['No', false]],
{:include_blank => true, :custom_label => 'Will you be attending?'}  %>

The view is rendered correctly.


The validation for this dropdown requires that blank is invalid.  Only
"yes" or "no" are valid.

My Model (guest.rb) contains:

validates_inclusion_of (:attending, :in => [true, false])

The Issue is:

When I select blank in the UI dropdown component and post the form, the
validation succeeds and when the form is redisplayed 'No' is selected in
the dropdown.  I see that in the database (MySQL) attending column,
false gets saved in that column.

How do I make validation to fail when blank is selected in the dropdown.

thanks,
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