创建作为基础模型子集的单独模型/表

Question

I have a Transaction model that contains the list of all transactions from my bank account. I want to create "sub" models that are just different categories of transactions. For instance, an Income model that just contains the deposits or a Bill model that contains the transactions that are from bills. The closest I could find were proxy models but either they are too complex for me to understand or I'm totally wrong anyway.

class Transaction(models.Model):
    date = models.DateField(default=datetime.date.today)
    description = models.CharField(max_length=100)
    category = models.CharField(max_length=100)
    amount = models.DecimalField(max_digits=10, decimal_places=2)

    def __str__(self):
        return self.description + ' ' + str(self.amount)

class Income(Transaction):
    class Meta:
        proxy = True

Is this possible?

Answer 1

您可以将category字段与选择一起使用，而不是继承。

Answer 2

Apart from what @rakyi said if we need to do model operation based on that then there is another possible way to use django-polymorphic link . This also support DRF so it's very powerful and useful.