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"""
Existing related object instance caching.
Queries are not redone when going back through known relations.
"""
from django.db import models
class Tournament(models.Model):
name = models.CharField(max_length=30)
class Organiser(models.Model):
name = models.CharField(max_length=30)
class Pool(models.Model):
name = models.CharField(max_length=30)
tournament = models.ForeignKey(Tournament, models.CASCADE)
organiser = models.ForeignKey(Organiser, models.CASCADE)
class PoolStyle(models.Model):
name = models.CharField(max_length=30)
pool = models.OneToOneField(Pool, models.CASCADE)
another_pool = models.OneToOneField(
Pool, models.CASCADE, null=True, related_name="another_style"
)
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