Django: Two different child classes point to same parent class

Question

I have a model Person which stores all data about people. I also have a Client model which extends Person. I have another extending model OtherPe

Answer 1

What you are doing is not possible as you do it, Django has specific rules for inheritance

The only possible schema is:

class Parent(models.Model):
    class Meta:
        abstract = True # MUST BE !!! This results in no relation generated in your DB

    field0 = models.CharField(...
    ...

    # here you're allowed to put some functions and some fields here


class Child(models.Model):
    field1 = models.CharField(...
    ...

    # Anything you want, this model will create a relation in your database with field0, field1, ...


class GrandChild(models.Model):
    class Meta:
        proxy = True # MUST BE !!! This results in no relation generated in your DB

    # here you're not allowed to put DB fields, but you can override __init__ to change attributes of the fields: choices, default,... You also can add model methods.

This is because there is no DB inheritance in most DBGS. Thus you need to make you parent class abstract !