Rails - Mar 2006 - accessing form elements

Rails names its form fields as model[field] , but you can''t access the
value in javascript by document.form.model[field].value.  How do you
escape the [''s to access the value?

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If you''re using prototype, you can use

$(''model_field'').value

-Thomas

Am 08.03.2006 um 21:19 schrieb rmb:
> Rails names its form fields as model[field] , but you can''t access
the
> value in javascript by document.form.model[field].value.  How do you
> escape the [''s to access the value?
>
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> Posted via http://www.ruby-forum.com/.
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rmb wrote:
> Rails names its form fields as model[field] , but you can''t access
the
> value in javascript by document.form.model[field].value.  How do you
> escape the [''s to access the value?
I haven''t tested this, but I believe you would do:

   document.form[''model[field]''].value

The other thing you could do is use the form field''s ID value, with a 
getElementById DOM call:

   element = getElementById(''model_field'')

This assumes, of course, that you have unique IDs for all your form elements.

-Brian

Brian V. Hughes wrote:
> rmb wrote:
>> Rails names its form fields as model[field] , but you can''t
access the
>> value in javascript by document.form.model[field].value.  How do you
>> escape the [''s to access the value?
> 
> I haven''t tested this, but I believe you would do:
> 
>    document.form[''model[field]''].value
> 
> The other thing you could do is use the form field''s ID value,
with a
> getElementById DOM call:
> 
>    element = getElementById(''model_field'')
> 
> This assumes, of course, that you have unique IDs for all your form 
> elements.
> 
> -Brian
The second one works.  The first one gives a javascript "has no 
properties" error

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