Rails - Jul 2007 - "form_for" names fields using brackets = javascript problems

Hi all,

The "form_for" helper and its friends "text_field_for" etc
generate form
fields with names like "forum[title]", i.e. using square brackets to
denote attributes on model objects.

Now, for the convenience of the user I want to do some simple
client-side validation to check that some fields have been filled in. So
I am trying to write javascript like

"if (myForm.forum[title].value == '''') { return false;
}",

 but ofcourse the  "title" in the brackets is interpreted as the name
of
a child object of a "forum" object in the DOM for the page. Doh!

Is there a way to solve this?

I realize this is more a javascript question than RoR question, but I
have looked fruitlessly for an answer and I figure people trying
client-side validation in RoR must have stumbled on this problem.

Please note that I am NOT using client-side validation to replace
server-side, it is just used as an added benefit for javascript enabled
clients.

Thanks,

/Andreas

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> The "form_for" helper and its friends "text_field_for"
etc generate form
> fields with names like "forum[title]", i.e. using square brackets
to
> denote attributes on model objects.
>
> Now, for the convenience of the user I want to do some simple
> client-side validation to check that some fields have been filled in. So
> I am trying to write javascript like
>
> "if (myForm.forum[title].value == '''') { return
false; }",
myForm.elements[''forum[title]''].value

-philip
>
> but ofcourse the  "title" in the brackets is interpreted as the
name of
> a child object of a "forum" object in the DOM for the page. Doh!
>
> Is there a way to solve this?
>
> I realize this is more a javascript question than RoR question, but I
> have looked fruitlessly for an answer and I figure people trying
> client-side validation in RoR must have stumbled on this problem.
>
> Please note that I am NOT using client-side validation to replace
> server-side, it is just used as an added benefit for javascript enabled
> clients.
>
> Thanks,
>
> /Andreas
>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Philip Hallstrom wrote:
>> The "form_for" helper and its friends
"text_field_for" etc generate form
>> fields with names like "forum[title]", i.e. using square
brackets to
>> denote attributes on model objects.
>>
>> Now, for the convenience of the user I want to do some simple
>> client-side validation to check that some fields have been filled in.
So
>> I am trying to write javascript like
>>
>> "if (myForm.forum[title].value == '''') { return
false; }",
> 
> myForm.elements[''forum[title]''].value
> 
> -philip
Thanks philip! I''ll try it out later today, seems like it will get the 
job done!

/Andreas

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