Rails - Jan 2006 - Problem with multiple collection_select

I am trying to allow the user to select more than one value from a 
selection list.  Here is the code:

<%= collection_select(:transition, :complete_tasks, @permissions, :id, 
:path, "", {:size => "10", :multiple => true} ) %>

The multiple HTML option is supposed to allow multiple selections and, 
in fact, it does, although the HTML generated show the attribute as 
multiple=multiple when it should be just multiple.

The problem is that RAILS is only returning one value in 
transition.complete_tasks.

Any idea what is going on?

Thanks!

-- 
Posted via http://www.ruby-forum.com/.

I ended up having to write a small, simple helper for this because I ran
into the same problem. Basically the helper takes the same attributes as
options_from_col....  does, and also takes an array of selected objects and
generates the list accordiningly. I dont have it on me now, but will post it
tomorrow if I can and if you need it.

-Nick

On 1/4/06, Stan Shore <stan@workflowinc.com>
wrote:
>
> I am trying to allow the user to select more than one value from a
> selection list.  Here is the code:
>
> <%= collection_select(:transition, :complete_tasks, @permissions, :id,
> :path, "", {:size => "10", :multiple => true} )
%>
>
> The multiple HTML option is supposed to allow multiple selections and,
> in fact, it does, although the HTML generated show the attribute as
> multiple=multiple when it should be just multiple.
>
> The problem is that RAILS is only returning one value in
> transition.complete_tasks.
>
> Any idea what is going on?
>
> Thanks!
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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Stan Shore wrote:
> I am trying to allow the user to select more than one value from a 
> selection list.  Here is the code:
> 
> <%= collection_select(:transition, :complete_tasks, @permissions, :id, 
> :path, "", {:size => "10", :multiple => true} )
%>
> 
> The multiple HTML option is supposed to allow multiple selections and, 
> in fact, it does, although the HTML generated show the attribute as 
> multiple=multiple when it should be just multiple.
multiple="multiple"

is the correct XHTML (in XHTML, all attributes have to have values)
> The problem is that RAILS is only returning one value in 
> transition.complete_tasks.
> 
> Any idea what is going on?
I found this message from Michael Koziarski in my mail archive:

<quote>
On Apr 12, 2005 9:47 AM, Jason Foreman <threeve.org@gmail.com> wrote:
 >>> I''m trying to get multiple selected values from a
<SELECT> tag into
 >>> @params, but I can only get the first value in. This my code,
something
 >
 > i believe to get multiple value params you use @request.params instead
 > of @params. @params will always only give you the first one.

No need to do that. Just call your parameter something with [] on the
end. That way rails knows it''s multiple.

i.e if you call it blah[] then @params["blah"] yields an Array.
</quote>

That was in a thread with subject "[Rails] Getting multiple values from 
<SELECT> into @params?", back in April 2005.

regards

   Justin