From: Michael Campbell <michael.campbell@...>
Date: 2005-06-09T12:43:46+09:00
Subject: Re: How to neatly handle multiple checkboxes with Rails

On 4/29/05, Gavin Kistner <gavin@refinery.com> wrote:
> On Apr 26, 2005, at 1:54 PM, Edgardo Hames wrote:
> > In case this solution is way too far from being done, how can I handle
> > checking and unchecking the different authors in that table on the
> > Controller side? What I would need to do is remove the unchecked
> > authors and add the checked ones. [...] How do you all usually solve
> > this problem?
> 
> The functionality of checkboxes is the same as that of a
> multiple-select field, though the UI is different.


Quite a bit, yeah.  Gavin, I'm old, so go slow, but you've completely lost me.

If I iterate over a check_box tag (using a render_partial_collection),
what I get is something like:

<input type="checkbox"  name="object[method]" value="2"> foo
<input type="checkbox"  name="object[method]" value="3"> bar
<input type="checkbox"  name="object[method]" value="4"> baz
<input type="checkbox"  name="object[method]" value="10"> blurfle
...

but if I select multiple, params has only 1, due to the same key in each one:

@params => {object => {method => 2}}  (or 3, or 4, or 10, but never
more than one of those)

How do I structure the checkbox tag (or can I?) so that I can end up
with some indication that (ex.) both "foo" and "bar" were checked?