Rails - Jan 2008 - asking for help with select form helper and observe_field

I have a select form helper and an observe_field that''s observing the
select and calling an action when the select changes. However, I''m
having trouble passing the right parameters from the select.

The select helper is inside of a form_for and looks like:
f.select(:name, @books)

The observe_field looks like:
observe_field :id, :url => { :action => ''index'' }

When the post request occurs, I see that the right value parameter
from the select is passed, but is of the form: value => nil, which I
can''t work with.

Can someone lend me a hand?
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you''re observing the wrong field? You''re specifying :id in
your
observe_field (in the example you gave us)

The correct way to do that is:

observe_field("object_name", :url => { :action =>
''index'' })

How are you specifying the ID for the object? I''m guessing you
didn''t
specify just :id for it :)

On Jan 2, 2008 3:57 PM, eggman2001
<sodani-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> I have a select form helper and an observe_field that''s observing
the
> select and calling an action when the select changes. However, I''m
> having trouble passing the right parameters from the select.
>
> The select helper is inside of a form_for and looks like:
> f.select(:name, @books)
>
> The observe_field looks like:
> observe_field :id, :url => { :action => ''index'' }
>
> When the post request occurs, I see that the right value parameter
> from the select is passed, but is of the form: value => nil, which I
> can''t work with.
>
> Can someone lend me a hand?
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net
Feel free to add me to MSN and/or GTalk as this email.

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On Jan 1, 2008, at 9:27 PM, eggman2001 wrote:
>
> I have a select form helper and an observe_field that''s observing
the
> select and calling an action when the select changes. However, I''m
> having trouble passing the right parameters from the select.
>
> The select helper is inside of a form_for and looks like:
> f.select(:name, @books)
>
> The observe_field looks like:
> observe_field :id, :url => { :action => ''index'' }
>
> When the post request occurs, I see that the right value parameter
> from the select is passed, but is of the form: value => nil, which I
> can''t work with.
>
> Can someone lend me a hand?


Try this:

observe_field ''books_name'', :url => { :action =>
''index'' }

n.b., you''ll have to look at the id in your HTML to make sure  
''books_name'' is right, but the documentation on observe_field
is
specific that the first argument is the DOM id of the field. If you  
are still getting nil values, try a second parameter to the hash:

  :with =>
"Form.Element.serialize(''your_field_id'')"

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Had everything right. I just needed to add the :with option. Thanks!!

On Jan 2, 12:36 am, "s.ross"
<cwdi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Jan 1, 2008, at 9:27 PM, eggman2001 wrote:
>
>
>
>
>
> > I have a select form helper and an observe_field that''s
observing the
> > select and calling an action when the select changes. However,
I''m
> > having trouble passing the right parameters from the select.
>
> > The select helper is inside of a form_for and looks like:
> > f.select(:name, @books)
>
> > The observe_field looks like:
> > observe_field :id, :url => { :action =>
''index'' }
>
> > When the post request occurs, I see that the right value parameter
> > from the select is passed, but is of the form: value => nil, which
I
> > can''t work with.
>
> > Can someone lend me a hand?
>
> Try this:
>
> observe_field ''books_name'', :url => { :action =>
''index'' }
>
> n.b., you''ll have to look at the id in your HTML to make sure
> ''books_name'' is right, but the documentation on
observe_field is
> specific that the first argument is the DOM id of the field. If you
> are still getting nil values, try a second parameter to the hash:
>
>   :with =>
"Form.Element.serialize(''your_field_id'')"
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