mirror of
https://github.com/django/django.git
synced 2024-12-25 02:26:12 +00:00
2d877da855
Adds a reasonably feature complete implementation of full text search using the built in PostgreSQL engine. It uses public APIs from Expression and Lookup. With thanks to Tim Graham, Simon Charettes, Josh Smeaton, Mikey Ariel and many others for their advice and review. Particular thanks also go to the supporters of the contrib.postgres kickstarter.
166 lines
4.7 KiB
Python
166 lines
4.7 KiB
Python
from django.db import connection, models
|
|
|
|
from .fields import (
|
|
ArrayField, BigIntegerRangeField, DateRangeField, DateTimeRangeField,
|
|
FloatRangeField, HStoreField, IntegerRangeField, JSONField,
|
|
SearchVectorField,
|
|
)
|
|
|
|
|
|
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()
|
|
|
|
def __str__(self):
|
|
return self.field
|
|
|
|
|
|
# Scene/Character/Line models are used to test full text search. They're
|
|
# populated with content from Monty Python and the Holy Grail.
|
|
class Scene(models.Model):
|
|
scene = models.CharField(max_length=255)
|
|
setting = models.CharField(max_length=255)
|
|
|
|
def __str__(self):
|
|
return self.scene
|
|
|
|
|
|
class Character(models.Model):
|
|
name = models.CharField(max_length=255)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Line(PostgreSQLModel):
|
|
scene = models.ForeignKey('Scene', models.CASCADE)
|
|
character = models.ForeignKey('Character', models.CASCADE)
|
|
dialogue = models.TextField(blank=True, null=True)
|
|
dialogue_search_vector = SearchVectorField(blank=True, null=True)
|
|
dialogue_config = models.CharField(max_length=100, blank=True, null=True)
|
|
|
|
def __str__(self):
|
|
return self.dialogue or ''
|
|
|
|
|
|
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)
|