#2352: Provide widget instance to callable default value
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Reporter: xaka | Owner:
Type: enhancement | Status: new
Priority: normal | Milestone:
Component: TurboGears | Version: 1.0.8
Severity: normal | Resolution:
Keywords: |
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Comment (by chrisz):
Replying to [comment:3 xaka]:
> What you will do if you need return default value depend on field
properties (name, params, something other)?
As explained above: Instead of {{{return "Bozo"}}} you could write
something like {{{return self.fields[0].name}}}. The advantage here is
that you can also refer to parameters of other fields that way. Or you can
do the following if you only need parameters of the field itself:
{{{
class MyTextField(widgets.TextField):
def default(self):
return get_value_from_db(self.name)
class MyForm(widgets.TableForm):
fields = [MyTextField(name='bozo')]
myform=MyForm()
}}}
Btw, do you want to use this trick to prepopulate the fields of a form
with values from the database? This is much easier. You just pass the
widget at render time the object from the database. No need to use default
values for this. These come into play when you display a form to enter a
new database record and are usually pretty static.
--
Ticket URL: <http://trac.turbogears.org/ticket/2352#comment:4>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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