90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
from django.db import models
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from polymorphic import PolymorphicModel, PolymorphicManager, PolymorphicQuerySet, ShowFields, ShowFieldsAndTypes
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class PlainA(models.Model):
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field1 = models.CharField(max_length=10)
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class PlainB(PlainA):
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field2 = models.CharField(max_length=10)
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class PlainC(PlainB):
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field3 = models.CharField(max_length=10)
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class ModelA(PolymorphicModel):
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field1 = models.CharField(max_length=10)
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class ModelB(ModelA):
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field2 = models.CharField(max_length=10)
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class ModelC(ModelB):
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field3 = models.CharField(max_length=10)
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class Base(PolymorphicModel):
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field_b = models.CharField(max_length=10)
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class ModelX(Base):
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field_x = models.CharField(max_length=10)
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class ModelY(Base):
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field_y = models.CharField(max_length=10)
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class Enhance_Plain(models.Model):
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field_p = models.CharField(max_length=10)
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class Enhance_Base(ShowFieldsAndTypes, PolymorphicModel):
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field_b = models.CharField(max_length=10)
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class Enhance_Inherit(Enhance_Base, Enhance_Plain):
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field_i = models.CharField(max_length=10)
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class DiamondBase(models.Model):
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field_b = models.CharField(max_length=10)
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class DiamondX(DiamondBase):
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field_x = models.CharField(max_length=10)
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class DiamondY(DiamondBase):
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field_y = models.CharField(max_length=10)
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class DiamondXY(DiamondX, DiamondY):
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pass
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class RelationBase(ShowFieldsAndTypes, PolymorphicModel):
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field_base = models.CharField(max_length=10)
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fk = models.ForeignKey('self', null=True)
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m2m = models.ManyToManyField('self')
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class RelationA(RelationBase):
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field_a = models.CharField(max_length=10)
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class RelationB(RelationBase):
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field_b = models.CharField(max_length=10)
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class RelationBC(RelationB):
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field_c = models.CharField(max_length=10)
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class RelatingModel(models.Model):
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many2many = models.ManyToManyField(ModelA)
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class MyManager(PolymorphicManager):
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def get_query_set(self):
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return super(MyManager, self).get_query_set().order_by('-field1')
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class ModelWithMyManager(ShowFieldsAndTypes, ModelA):
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objects = MyManager()
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field4 = models.CharField(max_length=10)
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class MROBase1(PolymorphicModel):
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objects = MyManager()
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class MROBase2(MROBase1):
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pass # Django vanilla inheritance does not inherit MyManager as _default_manager here
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class MROBase3(models.Model):
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objects = PolymorphicManager()
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class MRODerived(MROBase2, MROBase3):
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pass
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class MgrInheritA(models.Model):
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mgrA = models.Manager()
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mgrA2 = models.Manager()
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field1 = models.CharField(max_length=10)
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class MgrInheritB(MgrInheritA):
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mgrB = models.Manager()
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field2 = models.CharField(max_length=10)
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class MgrInheritC(ShowFieldsAndTypes, MgrInheritB):
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pass
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class Project(ShowFields,PolymorphicModel):
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topic = models.CharField(max_length=30)
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class ArtProject(Project):
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artist = models.CharField(max_length=30)
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class ResearchProject(Project):
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supervisor = models.CharField(max_length=30)
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