On Feb 5, 1:06 pm, Marc Aymerich <glicer...@gmail.com> wrote:
> Thank you all for the answers!
>
> I'll try to give you the context in which I need to generate classes
> like this.
>
> I'm developing a reusable control panel for an ISP. I have several
> modules (VirtualUser, SystemUser, VPS, VirtualHost, ...) and they all
> share the fact that you can have limits on resource consumption. for
> example.
>
> VPS: has limits on swap, memory, cpu and disk.
> SystemUser: has limits on disk and traffic.
>
> As all modules share this property of being limited I have decided to
> split the limit functionality in a separate module (called resources).
> Resources are associated dinamically with (vps, systemuser ...)
> through a Monitor class. So it's up to you decide what limits you are
> interested to put in the VPS or in the SystemUser ...
>
> So when you attach the "disk limit" to SystemUser model is necessary
> to create a web form for SystemUser a bit different than if you decide
> to have disk and traffic limits. That is what my posted code is
> supposed to do.
>
> Do you think that I am on the wrong way designing the control panel
> like this?
>
> Btw, I've seen several interesting ideas to create the class
> dinamically (with class factorys, MetaClass, dictionaries ..), but I
> have not yet clear whether this will be usefull for create the
> __init__ function at runtime too. Any clue on this?
>
this seems to work :)
def makeLimitForm(name, monitors, _model):
class Meta:
model = _model
dct = { 'Meta': Meta }
for monitor in monitors:
field_name = monitor.resource + "_limit"
dct[field_name] = forms.CharField(max_length=100,
initial=monitor.default_limit)
def __init__(self, *args, **kwargs):
ModelForm.__init__(self, *args, **kwargs)
if 'instance' in kwargs:
for monitor in monitors:
field_name = monitor.resource + "_limit"
print monitor
self.fields[field_name].initial =
kwargs['instance'].monitoring.filter(monitor=monitor)[0].current
dct['__init__'] = __init__
return type(name,(ModelForm,),dct)
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