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40 lines
965 B
Python
40 lines
965 B
Python
from django.db import models
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class School(models.Model):
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name = models.CharField(max_length=100)
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class Parent(models.Model):
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name = models.CharField(max_length=100)
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class Child(models.Model):
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mother = models.ForeignKey(Parent, models.CASCADE, related_name="mothers_children")
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father = models.ForeignKey(Parent, models.CASCADE, related_name="fathers_children")
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school = models.ForeignKey(School, models.CASCADE)
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name = models.CharField(max_length=100)
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class Meta:
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constraints = [
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models.UniqueConstraint("mother", "father", name="unique_parents"),
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]
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class Poet(models.Model):
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name = models.CharField(max_length=100)
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def __str__(self):
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return self.name
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class Poem(models.Model):
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poet = models.ForeignKey(Poet, models.CASCADE)
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name = models.CharField(max_length=100)
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class Meta:
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unique_together = ("poet", "name")
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def __str__(self):
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return self.name
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