Question

class SomeBaseClass(models.Model):
    CHOICES_1 = (
     (1, '1'),
     (2, '2'),
     (3, '3'),
     (4, '4'),
     )
    ONETIME = 'OT'
    WEEKLY = 'WK'
    BIWEEKLY = 'BW'
    MONTHLY = 'MN'
    BIMONTHLY = 'BM'
    YEARLY = 'YR'
    CHOICES_2 = (
        (ONETIME, 'One Time'),
        (WEEKLY, 'Weekly'),
        (BIWEEKLY, 'Bi-Weekly'),
        (MONTHLY, 'Monthly'),
        (BIMONTHLY, 'Bi-Monthly'),
        (YEARLY, 'Yearly'),
    )
    CHOICES_3 = (
         (0,'0'),
         (1,'1'),
         (2,'2'),
         (3,'3'),
         (4,'4'),
         (5,'5'),
         (10,'10'),
    )
    field1 = models.CharField(max_length=10)
    field2 = models.DateTimeField(auto_now_add=True) 
    field3 = models.DateField()
    field4 = models.TimeField()
    field5 = models.SmallIntegerField(choices=CHOICES_1)
    field6 = models.CharField(max_length=2,choices=CHOICES_2)
    field7 = models.SmallIntegerField(choices=CHOICES_3)
    field8 = models.CharField(max_length=80)
    field9 = models.TextField(max_length=300)
    class Meta:
        abstract = True

class SomeDerivedClass(SomeBaseClass):
    field10 = models.DateTimeField()
    field11 = models.ForeignKey(Business, blank=True)


class SomeDerivedClassForm(forms.ModelForm):
    class Meta:
        model = SomeDerivedClass
        exclude = ['field2']
        exclude = ['field10']
        exclude = ['field11']

When the “SomeDerivedClassForm” is rendered, the field10 shows up on the website even though I’ve set it to be excluded. Prior to this I had field11 in the base class, and at that time field10 was not shown in the rendered form but field11 was showing up even though it’s excluded. I realize I must have some bug in my code but I’m not seeing what it is.
Do you need to do anything special to use forms with derived classes?

Answer 1

I’m not sure this is that simple.

Instead of this in your code, here you are overwriting the exclude list every time you want to add a field to it.

 exclude = ['field2']
 exclude = ['field10']
 exclude = ['field11']

write:

 exclude = ['field2', 'field10', 'field11']