由于您的父母模式旨在抽象，您应该将其标记为这样。

Since your parent model is intended to be abstract, you should mark it as such.

class BusinessEntity(models.Model):
    title = models.CharField(max_length=180)

    class Meta:
        abstract = True

这样可以防止Django为它创建一个单独的表，因此需要一个 _ptr 字段从子类指向它。相反，您的子类的表将被创建为直接包含继承的字段。

This prevents Django from creating a separate table for it, and therefore needing a _ptr field to point back to it from the subclass. Instead, the table for your subclass will be created to include the inherited field(s) directly.