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from django.db import connection, models
from .fields import (
ArrayField, BigIntegerRangeField, DateRangeField, DateTimeRangeField,
FloatRangeField, HStoreField, IntegerRangeField, JSONField,
)
class Tag(object):
def __init__(self, tag_id):
self.tag_id = tag_id
def __eq__(self, other):
return isinstance(other, Tag) and self.tag_id == other.tag_id
class TagField(models.SmallIntegerField):
def from_db_value(self, value, expression, connection, context):
if value is None:
return value
return Tag(int(value))
def to_python(self, value):
if isinstance(value, Tag):
return value
if value is None:
return value
return Tag(int(value))
def get_prep_value(self, value):
return value.tag_id
class PostgreSQLModel(models.Model):
class Meta:
abstract = True
required_db_vendor = 'postgresql'
class IntegerArrayModel(PostgreSQLModel):
field = ArrayField(models.IntegerField())
class NullableIntegerArrayModel(PostgreSQLModel):
field = ArrayField(models.IntegerField(), blank=True, null=True)
class CharArrayModel(PostgreSQLModel):
field = ArrayField(models.CharField(max_length=10))
class DateTimeArrayModel(PostgreSQLModel):
datetimes = ArrayField(models.DateTimeField())
dates = ArrayField(models.DateField())
times = ArrayField(models.TimeField())
class NestedIntegerArrayModel(PostgreSQLModel):
field = ArrayField(ArrayField(models.IntegerField()))
class OtherTypesArrayModel(PostgreSQLModel):
ips = ArrayField(models.GenericIPAddressField())
uuids = ArrayField(models.UUIDField())
decimals = ArrayField(models.DecimalField(max_digits=5, decimal_places=2))
tags = ArrayField(TagField(), blank=True, null=True)
class HStoreModel(PostgreSQLModel):
field = HStoreField(blank=True, null=True)
class CharFieldModel(models.Model):
field = models.CharField(max_length=16)
class TextFieldModel(models.Model):
field = models.TextField()
class RangesModel(PostgreSQLModel):
ints = IntegerRangeField(blank=True, null=True)
bigints = BigIntegerRangeField(blank=True, null=True)
floats = FloatRangeField(blank=True, null=True)
timestamps = DateTimeRangeField(blank=True, null=True)
dates = DateRangeField(blank=True, null=True)
class RangeLookupsModel(PostgreSQLModel):
parent = models.ForeignKey(RangesModel, models.SET_NULL, blank=True, null=True)
integer = models.IntegerField(blank=True, null=True)
big_integer = models.BigIntegerField(blank=True, null=True)
float = models.FloatField(blank=True, null=True)
timestamp = models.DateTimeField(blank=True, null=True)
date = models.DateField(blank=True, null=True)
# Only create this model for postgres >= 9.4
if connection.vendor == 'postgresql' and connection.pg_version >= 90400:
class JSONModel(models.Model):
field = JSONField(blank=True, null=True)
else:
# create an object with this name so we don't have failing imports
class JSONModel(object):
pass
class ArrayFieldSubclass(ArrayField):
def __init__(self, *args, **kwargs):
super(ArrayFieldSubclass, self).__init__(models.IntegerField())
class AggregateTestModel(models.Model):
"""
To test postgres-specific general aggregation functions
"""
char_field = models.CharField(max_length=30, blank=True)
integer_field = models.IntegerField(null=True)
boolean_field = models.NullBooleanField()
class StatTestModel(models.Model):
"""
To test postgres-specific aggregation functions for statistics
"""
int1 = models.IntegerField()
int2 = models.IntegerField()
related_field = models.ForeignKey(AggregateTestModel, models.SET_NULL, null=True)
class NowTestModel(models.Model):
when = models.DateTimeField(null=True, default=None)
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