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f31beec0c4
Django's ForeignKey supports custom to_fields. The to field is the primary key by default, but can be modified. The to field is also used by forms to reduce database lookups. This patch add support for custom to_field names on both model or form layer.
62 lines
1.5 KiB
Python
62 lines
1.5 KiB
Python
from django.db import models
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class Genre(models.Model):
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title = models.CharField(max_length=50)
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class Meta:
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ordering = ('title',)
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def __str__(self):
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return self.title
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class Artist(models.Model):
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title = models.CharField(max_length=50, unique=True)
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genres = models.ManyToManyField(Genre)
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class Meta:
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ordering = ('title',)
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def __str__(self):
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return self.title
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class Album(models.Model):
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title = models.CharField(max_length=255)
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artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
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featured_artists = models.ManyToManyField(Artist, blank=True, related_name='featured_album_set')
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primary_genre = models.ForeignKey(Genre, on_delete=models.CASCADE, blank=True, null=True,
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related_name='primary_album_set')
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genres = models.ManyToManyField(Genre)
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class Meta:
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ordering = ('title',)
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def __str__(self):
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return self.title
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class Country(models.Model):
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name = models.CharField(max_length=255)
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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 City(models.Model):
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name = models.CharField(max_length=255)
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country = models.ForeignKey('Country', related_name="cities", on_delete=models.CASCADE)
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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 Groupie(models.Model):
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obsession = models.ForeignKey(Artist, to_field='title', on_delete=models.CASCADE)
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