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from django.db import models
from polymorphic.models import PolymorphicModel
from polymorphic.showfields import ShowFieldContent, ShowFieldTypeAndContent
class Project(ShowFieldContent, PolymorphicModel):
"""Polymorphic model"""
topic = models.CharField(max_length=30)
class ArtProject(Project):
artist = models.CharField(max_length=30)
class ResearchProject(Project):
supervisor = models.CharField(max_length=30)
class UUIDModelA(ShowFieldTypeAndContent, PolymorphicModel):
"""UUID as primary key example"""
uuid_primary_key = models.UUIDField(primary_key=True)
field1 = models.CharField(max_length=10)
class UUIDModelB(UUIDModelA):
field2 = models.CharField(max_length=10)
class UUIDModelC(UUIDModelB):
field3 = models.CharField(max_length=10)
class ProxyBase(PolymorphicModel):
"""Proxy model example - a single table with multiple types."""
title = models.CharField(max_length=200)
def __unicode__(self):
return f"<ProxyBase[type={self.polymorphic_ctype}]: {self.title}>"
class Meta:
ordering = ("title",)
class ProxyA(ProxyBase):
class Meta:
proxy = True
def __unicode__(self):
return f"<ProxyA: {self.title}>"
class ProxyB(ProxyBase):
class Meta:
proxy = True
def __unicode__(self):
return f"<ProxyB: {self.title}>"
# Internals for management command tests
class TestModelA(ShowFieldTypeAndContent, PolymorphicModel):
field1 = models.CharField(max_length=10)
class TestModelB(TestModelA):
field2 = models.CharField(max_length=10)
class TestModelC(TestModelB):
field3 = models.CharField(max_length=10)
field4 = models.ManyToManyField(TestModelB, related_name="related_c")
class NormalModelA(models.Model):
"""Normal Django inheritance, no polymorphic behavior"""
field1 = models.CharField(max_length=10)
class NormalModelB(NormalModelA):
field2 = models.CharField(max_length=10)
class NormalModelC(NormalModelB):
field3 = models.CharField(max_length=10)
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