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from django.db import models
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class Mod(models.Model):
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fld = models.IntegerField()
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class SubMod(Mod):
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cnt = models.IntegerField(unique=True)
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class M2mA(models.Model):
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others = models.ManyToManyField('M2mB')
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class M2mB(models.Model):
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fld = models.IntegerField()
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