Re: Empty automagic dropdown lists make Security component complain? --psybear

Thanks, cricket. I'm not sure but I believe Ruby On Rails created an
additional hidden input field to surpass this
"specification/limitation"; so when there's no value selected in the
dropdown, the hidden field's empty value was sent, and when a value
was selected, it oversteered the hidden field's empty value. I guess
this looked something like that:

<input type="hidden" name="data[Comment][post_id]" value="" />
<select name="data[Comment][post_id]">
<option value="1">...</option>
</select>

Does this violate any HTML spec?

Let's say that comments really can exist without being related to a
post: so what if I want change a comment's post_id to "no post", i.e.
null? This wouldn't be possible without the workaround above, would
it? Or I would have to specify a "null" value that's checked for in
the controller and then manually set the post_id to null?

On Fri, Dec 31, 2010 at 12:18 AM, cricket <zijn.digital@gmail.com> wrote:
> On Thu, Dec 30, 2010 at 4:12 PM, psybear83 <psybear83@gmail.com> wrote:
>> Hey everybody
>>
>> I just noticed that when I'm having an empty dropdown list and send
>> it, then its key in the data (e.g. data[Comment][post_id]) goes
>> missing, and I get a blank screen (probably because the Security
>> component thinks the form was manually changed).
>>
>> Is this normal?
>
> It's part of the HTML spec. The browser won't send data for an element
> that effectively has no data to send.
>
>> Is there a fix for this?
>
> Don't include an empty select list in the form. Or include
> 'Comment.post_id' in Security's $disabledFields array.
>
> ... But why would you ever have a Comment with no Post?
>
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