"Michele Cella" <[EMAIL PROTECTED]> writes:
> Olli Wang wrote:
>> could u tell my how to change the options at "display-time"?
>
> Pass an option parameter to the display method of your form, if you
> have a field named "type" that's a SelectionField (like
> SingleSelectField, MultipleSelectField, RadioButtonList and
> CheckBoxList) you can for example pass a dict like this from the
> controller:
>
> new_options = dict(type=[(1, "Java"), (2, "Ruby")])
>
> and then:
>
> form.display(options=new_options)
>
> By the way even using a callable changes the options at display time
> since that's when it's called.
>
> For further reference take a look at our tests:
>
> http://trac.turbogears.org/turbogears/browser/trunk/turbogears/widgets/tests/test_widgets.py#L229
I've been trying to do that for forms. How would you pass just new options
for some widgets inside, for example, a TableForm?
Example:
================================================================================
def unidades():
unidades = [[unidade.id, unidade.simbolo]
for unidade in model.Unidade.select(
orderBy = model.Unidade.q.simbolo,
)]
return unidades
formulario_conversao_unidades_de_medida = widgets.TableForm(
[
widgets.SingleSelectField(name = 'origem',
label = lazy_gettext('Unidade de Origem'),
css_classes = ['required'],
validator = validators.Int(not_empty = True),
options = unidades(),
),
widgets.SingleSelectField(name = 'destino',
label = lazy_gettext('Unidade de Destino'),
css_classes = ['required'],
validator = validators.Int(not_empty = True),
options = unidades(),
),
widgets.TextField(attrs = {'size':16, 'maxlength':15},
name = 'multiplicador',
label = lazy_gettext('Fator Multiplicador'),
css_classes = ['required'],
validator = validators.Number(not_empty = True),
),
widgets.HiddenField(name = 'conversao_unidade_id',
validator = validators.Int(if_empty = None),
),
],
)
================================================================================
Having it like this, if some new unit ('unidade') is added or removed the
value is either absent or present, depending on the case, what is
undesirable. The user never sees what is on tha database at the exact moment
he "opens" the page.
I've tried this in my controller:
================================================================================
for field in formulario_conversao_unidades_de_medida.widgets['fields']:
if field.name in ['origem', 'destino']:
field.options = unidades()
================================================================================
But then I get an exception:
================================================================================
Traceback (most recent call last):
File
"/usr/lib/python2.4/site-packages/CherryPy-2.2.0beta-py2.4.egg/cherrypy/_cphttptools.py",
line 99, in _run
self.main()
File
"/usr/lib/python2.4/site-packages/CherryPy-2.2.0beta-py2.4.egg/cherrypy/_cphttptools.py",
line 247, in main
body = page_handler(*virtual_path, **self.params)
File "<string>", line 3, in index
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/controllers.py",
line 212, in expose
tg_format, html, fragment, *args, **kw)
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/database.py",
line 218, in run_with_transaction
retval = func(*args, **kw)
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/controllers.py",
line 230, in _execute_func
output = errorhandling.try_call(func, *args, **kw)
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/errorhandling.py",
line 62, in try_call
output = func(self, *args, **kw)
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/conversoes_unidades.py",
line 48, in index
return self.conversoesunidades(conversao_unidade_id)
File "<string>", line 3, in conversoesunidades
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/controllers.py",
line 207, in expose
output = _execute_func(func, tg_format, html, fragment,
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/controllers.py",
line 230, in _execute_func
output = errorhandling.try_call(func, *args, **kw)
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/errorhandling.py",
line 62, in try_call
output = func(self, *args, **kw)
File "<string>", line 3, in conversoesunidades
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/identity/conditions.py",
line 232, in require
return fn(self, *args, **kwargs)
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/conversoes_unidades.py",
line 62, in conversoesunidades
field.options = unidades()
File
"/home/godoy/desenvolvimento/python/TurboGears/trunk/turbogears/widgets/base.py",
line 281, in __setattr__
raise ValueError, \
ValueError: It is not threadsafe to modify widgets in a request
================================================================================
I've also tried this in my controller:
================================================================================
data = dict(options = dict(origem = unidades(), destino = unidades()))
================================================================================
while having
================================================================================
<span py:replace="formulario.display(data, action='%s/update/' % root_link,
method = 'post')" />
================================================================================
in my template... But it didn't work either.
What is the correct way, in this case, to update my data so that it is
threadsafe and dynamic?
TIA,
--
Jorge Godoy <[EMAIL PROTECTED]>
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