Rails - Dec 2005 - Nulling a nullable boolean value from the UI?

In my model class I have a boolean attribute which can be NULL. I''d
like
to set all three possible values from the UI using radio buttons. These 
radio buttons have the values "true", "false", and
"" respectively. The
trouble is that Column#type_cast casts "" to false. The only way to
get
a nil value out of #type_cast, is to pass in nil. Of course, that''s not
what I get in the request; there the closest thing to a nil is an empty 
string.

So, how are others handling this?

Michael

-- 
Michael Schuerig                       Face reality and stare it down
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org        --Jethro Tull,
Silver River Turning
http://www.schuerig.de/michael/

On 4-dec-2005, at 19:22, Michael Schuerig wrote:
>
> In my model class I have a boolean attribute which can be NULL.
I''d
> like
> to set all three possible values from the UI using radio buttons.  
> These
> radio buttons have the values "true", "false", and
"" respectively.
> The
> trouble is that Column#type_cast casts "" to false. The only way
to
> get
> a nil value out of #type_cast, is to pass in nil. Of course,
that''s
> not
> what I get in the request; there the closest thing to a nil is an  
> empty
> string.
>
> So, how are others handling this?
I do it like this.

http://julik.textdriven.com/svn/tools/rails_plugins/attribute_cleanup/ 
init.rb

On Monday 05 December 2005 15:51, Julian ''Julik'' Tarkhanov
wrote:
> On 4-dec-2005, at 19:22, Michael Schuerig wrote:
[snip]
> > So, how are others handling this?
>
> I do it like this.
>
> http://julik.textdriven.com/svn/tools/rails_plugins/attribute_cleanup
>/ init.rb
I considered something similar, but came down to this

http://dev.rubyonrails.org/ticket/3102

Michael

-- 
Michael Schuerig                                 Life is what happens 
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org                  While
you''re making plans
http://www.schuerig.de/michael/    --Kevin Gilbert, A Long Day''s Life

On 5-dec-2005, at 17:03, Michael Schuerig wrote:
> On Monday 05 December 2005 15:51, Julian ''Julik''
Tarkhanov wrote:
>> On 4-dec-2005, at 19:22, Michael Schuerig wrote:
> [snip]
>>> So, how are others handling this?
>>
>> I do it like this.
>>
>> http://julik.textdriven.com/svn/tools/rails_plugins/attribute_cleanup
>> / init.rb
>
> I considered something similar, but came down to this
>
> http://dev.rubyonrails.org/ticket/3102
I hope they accept it, it''s indeed more thorough. Can you add some  
tests to it?



--
Julian ''Julik'' Tarkhanov
me at julik.nl