Dynamic select fields in a form

[Diego Woitasen]

Hi,
I want to build a form which have some select fields where they
values change in each instantiation of the form. My idea was to write
a subclass of TableForm, rewriting the __init__() function to get a
new parameter to filter select values. For example, I tried with this
but doesn't work (empty form):

class MyForm(TableForm):
def __init__(self, id=None, parent=None, children=[], filter = [],
**kw):
super(MyForm, self).__init__(id,parent,children, **kw)

options = get_data_from_db(filter)

self.fields = [
SelectionField(options = options)
]

For now I solved the problem writing I function that returns fields
and use it like this:

form = TableForm('name', action='foo', children = get_fields(filter))

but I don't like it.

Is there a way to write a subclass that takes some data to dynamically
change SelectionFields?

Regards,
Diego

[percious]

I believe tw.dynforms has what you desire:

http://toscawidgets.org/documentation/tw.dynforms/

cheers.
-chris

[Danny Adair]

Just use update_params or make options a callable.
See this thread:
http://markmail.org/message/pckkm2zjepfgxpjq

Cheers,
Danny

--
Kind regards,

Danny W. Adair
Director
Unfold Limited
New Zealand

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[Diego Woitasen]

On May 28, 7:57 pm, Danny Adair <danny.ad...@unfold.co.nz> wrote:
> Just use update_params or make options a callable.
> See this thread:http://markmail.org/message/pckkm2zjepfgxpjq
>
> Cheers,
> Danny
>
>
>
> On Fri, May 29, 2009 at 10:47, percious <ch...@percious.com> wrote:
>
> > I believe tw.dynforms has what you desire:
>
> >http://toscawidgets.org/documentation/tw.dynforms/
>
> > cheers.
> > -chris
>

> Write:      danny.ad...@unfold.co.nz

> Browse:    www.unfold.co.nz
> Visit/Post: 41 Hihitahi Rise, Te Haumi, Paihia 0200, New Zealand
>
> "We are what we repeatedly do. Excellence, therefore, is not an act,
> but a habit." - Aristotle
>
> ==============================
> Caution
> The contents of this email and any attachments contain information
> which is CONFIDENTIAL to the recipient. If you are not the intended
> recipient, you must not read, use, distribute, copy or retain this
> email or its attachments. If you have received this email in error,
> please notify us immediately by return email or collect telephone call
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I followed the option 2 in the last mail (Alvaro's solution):

# pass options when displaying the form in the child_args dict
f.display(child_args=dict(age=dict(options=range(10))))

It's working for simpel fields but no for fieldsets. If I have a
fieldset called foo and a field called bar into it, how can I set
options for bar?

I tried with:

1) child_args = dict (bar = dict(options = bar_opts))
2) child_args = dict ('foo.bar' = dict(options = bar_opts))
3) child_args = dict (foo dict(bar = dict(options = bar_opts))

without success. No error, just doesn't work.

Regards,
Diego

[Danny Adair]

On Thu, Jun 4, 2009 at 11:27, Diego Woitasen <die...@xtech.com.ar> wrote:
>[...]

> I followed the option 2 in the last mail (Alvaro's solution):
>
> # pass options when displaying the form in the child_args dict
> f.display(child_args=dict(age=dict(options=range(10))))
>
> It's working for simpel fields but no for fieldsets. If I have a
> fieldset called foo and a field called bar into it, how can I set
> options for bar?
>
> I tried with:
>
> 1) child_args = dict (bar = dict(options = bar_opts))
> 2) child_args = dict ('foo.bar' = dict(options = bar_opts))
> 3) child_args = dict (foo dict(bar = dict(options = bar_opts))
>
> without success. No error, just doesn't work.

the structure of the values follows the structure of the form, so it's

child_args = dict(foo=dict(bar=dict(options=bar_options)))

or more visually

child_args = {
'foo': {
'bar': {
'options': bar_options
}
}
}

Hth,
Danny

[Diego Woitasen]

On 4 jun, 17:34, Danny Adair <danny.ad...@unfold.co.nz> wrote:

No, it doesn't work but I've found the right syntax:

child_args = { 'foo' :
{ 'child_args' =
{
'bar' : dict(options =
bar_options ),
}
}

Regards,
Diego