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44 lines
992 B
Python
44 lines
992 B
Python
from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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@python_2_unicode_compatible
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class Part(models.Model):
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name = models.CharField(max_length=20)
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class Meta:
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ordering = ('name',)
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def __str__(self):
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return self.name
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@python_2_unicode_compatible
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class Car(models.Model):
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name = models.CharField(max_length=20)
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default_parts = models.ManyToManyField(Part)
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optional_parts = models.ManyToManyField(Part, related_name='cars_optional')
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class Meta:
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ordering = ('name',)
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def __str__(self):
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return self.name
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class SportsCar(Car):
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price = models.IntegerField()
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@python_2_unicode_compatible
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class Person(models.Model):
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name = models.CharField(max_length=20)
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fans = models.ManyToManyField('self', related_name='idols', symmetrical=False)
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friends = models.ManyToManyField('self')
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class Meta:
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ordering = ('name',)
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def __str__(self):
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return self.name
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