21 lines
484 B
Python
21 lines
484 B
Python
from django.db import models
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class ParentManager(models.Manager):
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def get_by_natural_key(self, parent_data):
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return self.get(parent_data=parent_data)
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class Parent(models.Model):
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parent_data = models.CharField(max_length=30, unique=True)
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parent_m2m = models.ManyToManyField('self')
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objects = ParentManager()
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def natural_key(self):
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return (self.parent_data,)
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class Child(Parent):
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child_data = models.CharField(max_length=30, unique=True)
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