Meta inheritance across abstract base class

[Torsten Bronger]

Hallöchen!

I have the following model structure:

class A(models.Model):
...
class Meta:
ordering = ["timestamp"]
get_latest_by = "timestamp"

class B(A):
class Meta(A.Meta):
abstract = True

class C(B):
...

Then, class C doesn't haven ordering or get_latest_by set. Is this
expected behaviour? Then, I would simply re-define them in B.

Tschö,
Torsten.

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[Collin Anderson]

Hi,

If you define a new class Meta on C, then it will _replace_ the previous class Meta. You can, however have class Meta inherit other class Meta.

class Student(CommonInfo):
    # ...
    class Meta(CommonInfo.Meta):
        db_table = 'student_info'

https://docs.djangoproject.com/en/dev/topics/db/models/#meta-inheritance

Collin

[Torsten Bronger]

Hallöchen!

Collin Anderson writes:

> If you define a new class Meta on C, then it will _replace_ the

> previous class Meta. [...]

I indeed have a Meta class in C but it is derived from the upstream
Meta class. The inheritance chain in my Meta's is uninterrupted.

[Collin Anderson]

Hi,

Ohh. Yup. I didn't read that carefully enough. That behavior doesn't seem expected to me. Expecially considering this sentence:

"if the child does not specify an ordering attribute or a get_latest_by attribute, it will inherit these from its parent."

Collin