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import uuid
from django.contrib.auth.models import User
from django.db import models
from django.db.models import QuerySet
from django.db.models.manager import BaseManager
from django.utils.translation import gettext_lazy as _
class RESTFrameworkModel(models.Model):
"""
Base for test models that sets app_label, so they play nicely.
"""
class Meta:
app_label = 'tests'
abstract = True
class BasicModel(RESTFrameworkModel):
text = models.CharField(
max_length=100,
verbose_name=_("Text comes here"),
help_text=_("Text description.")
)
# Models for relations tests
# ManyToMany
class ManyToManyTarget(RESTFrameworkModel):
name = models.CharField(max_length=100)
class ManyToManySource(RESTFrameworkModel):
name = models.CharField(max_length=100)
targets = models.ManyToManyField(ManyToManyTarget, related_name='sources')
class BasicModelWithUsers(RESTFrameworkModel):
users = models.ManyToManyField(User)
# ForeignKey
class ForeignKeyTarget(RESTFrameworkModel):
name = models.CharField(max_length=100)
def get_first_source(self):
"""Used for testing related field against a callable."""
return self.sources.all().order_by('pk')[0]
@property
def first_source(self):
"""Used for testing related field against a property."""
return self.sources.all().order_by('pk')[0]
class UUIDForeignKeyTarget(RESTFrameworkModel):
uuid = models.UUIDField(primary_key=True, default=uuid.uuid4)
name = models.CharField(max_length=100)
class ForeignKeySource(RESTFrameworkModel):
name = models.CharField(max_length=100)
target = models.ForeignKey(ForeignKeyTarget, related_name='sources',
help_text='Target', verbose_name='Target',
on_delete=models.CASCADE)
class ForeignKeySourceWithLimitedChoices(RESTFrameworkModel):
target = models.ForeignKey(ForeignKeyTarget, help_text='Target',
verbose_name='Target',
limit_choices_to={"name__startswith": "limited-"},
on_delete=models.CASCADE)
class ForeignKeySourceWithQLimitedChoices(RESTFrameworkModel):
target = models.ForeignKey(ForeignKeyTarget, help_text='Target',
verbose_name='Target',
limit_choices_to=models.Q(name__startswith="limited-"),
on_delete=models.CASCADE)
# Nullable ForeignKey
class NullableForeignKeySource(RESTFrameworkModel):
name = models.CharField(max_length=100)
target = models.ForeignKey(ForeignKeyTarget, null=True, blank=True,
related_name='nullable_sources',
verbose_name='Optional target object',
on_delete=models.CASCADE)
class NullableUUIDForeignKeySource(RESTFrameworkModel):
name = models.CharField(max_length=100)
target = models.ForeignKey(ForeignKeyTarget, null=True, blank=True,
related_name='nullable_sources',
verbose_name='Optional target object',
on_delete=models.CASCADE)
class NestedForeignKeySource(RESTFrameworkModel):
"""
Used for testing FK chain. A -> B -> C.
"""
name = models.CharField(max_length=100)
target = models.ForeignKey(NullableForeignKeySource, null=True, blank=True,
related_name='nested_sources',
verbose_name='Intermediate target object',
on_delete=models.CASCADE)
# OneToOne
class OneToOneTarget(RESTFrameworkModel):
name = models.CharField(max_length=100)
class NullableOneToOneSource(RESTFrameworkModel):
name = models.CharField(max_length=100)
target = models.OneToOneField(
OneToOneTarget, null=True, blank=True,
related_name='nullable_source', on_delete=models.CASCADE)
class OneToOnePKSource(RESTFrameworkModel):
""" Test model where the primary key is a OneToOneField with another model. """
name = models.CharField(max_length=100)
target = models.OneToOneField(
OneToOneTarget, primary_key=True,
related_name='required_source', on_delete=models.CASCADE)
class CustomManagerModel(RESTFrameworkModel):
class CustomManager:
def __new__(cls, *args, **kwargs):
cls = BaseManager.from_queryset(
QuerySet
)
return cls
objects = CustomManager()()
# `CustomManager()` will return a `BaseManager` class.
# We need to instantiation it, so we write `CustomManager()()` here.
text = models.CharField(
max_length=100,
verbose_name=_("Text comes here"),
help_text=_("Text description.")
)
o2o_target = models.ForeignKey(OneToOneTarget,
help_text='OneToOneTarget',
verbose_name='OneToOneTarget',
on_delete=models.CASCADE)
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