Hi Djangoers,
I have an issue I can't work out. This is the situation:
I have a model called payment, which has a custom constructor which takes a
parameter. This is the code:
class Payment(models.Model):
id = models.AutoField(primary_key=True)
amount = models.FloatField("Total payment amount")
...
def __init__(self, business, *args, **kwargs):
super(Payment, self).__init__(*args, **kwargs)
self.business = business
Then in my forms file I have this model form:
class PaymentForm(forms.ModelForm):
class Meta:
model = Payment
def __init__(self, *args, **kwargs):
self.business = kwargs.pop('business')
super(PaymentForm, self).__init__(*args, **kwargs)
The problem I have is that when I try to create an instance of this form
with:
form = PaymentForm(request.GET, business=business)
I get the following error:
TypeError at /payment/
__init__() takes at least 2 arguments (1 given)
The stacktrace shows that it fails on self.instance = opts.model() ... in
this location.
/django/forms/models.py in __init__
initial=None, error_class=ErrorList, label_suffix=':',
empty_permitted=False, instance=None):
opts = self._meta
if instance is None:
if opts.model is None:
raise ValueError('ModelForm has no model class specified.')
# if we didn't get an instance, instantiate a new one
self.instance = opts.model() ...
object_data = {}
else:
self.instance = instance
object_data = model_to_dict(instance, opts.fields, opts.exclude)
# if initial was provided, it should override the values from
instance
if initial is not None:
I think I need to somehow pass the business object to model = Payment
inside the Meta class... Is this the case and does anyone know how to do it?
I have remove the constructor from the model and everything works.
Thanks a million!
-m
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