django inline formsets with a complex model for the nested form

Question

Say I have django model that looks something like this:

class Order(models.Model):
 number = models...
 date = models...

class OrderLine(models.Model):
 # One or more lines per order
 order = models.ForeginKey(Order)
 common_line = models.OneToOneField(CommonLine)

class CommonLine(models.Model):
 # common elements of what might be on a line item...
 taxes = model...
 amount = model...

I want to create a form that uses an inlineformset to edit one or more Lines (both OrderLine and CommonLine) per order.

I can create a formset that works with Order and OrderLine - but how do I get the inline formset to give me all the detailed items from the CommonLine class when displaying the formset. It seems the documentation on inline formsets requires that the inline form - the multiple lines on an order can only map to a single class...

Am I not seeing something in the documentation? I'm sure I can probably override something, I'm just not sure where.

Thanks for any help...

Answer 1

I solved problem with http://yergler.net/blog/2009/09/27/nested-formsets-with-django/. Pleas use the following correction in forms.py file:

        instance=None
            pk_value = hash(form.prefix)

+       correct_data = None
+       if (self.data):
+           correct_data = self.data;
        # store the formset in the .nested property
        form.nested = [
-           TenantFormset(data=self.data,
+           TenantFormset(data=correct_data,
                            instance = instance,

Just working on Django 1.4.1 very well.