650 lines
25 KiB
Python
650 lines
25 KiB
Python
import time
|
|
import unittest
|
|
from datetime import date, datetime
|
|
|
|
from django.core.exceptions import FieldError
|
|
from django.db import connection, models
|
|
from django.test import SimpleTestCase, TestCase, override_settings
|
|
from django.test.utils import register_lookup
|
|
from django.utils import timezone
|
|
|
|
from .models import Article, Author, MySQLUnixTimestamp
|
|
|
|
|
|
class Div3Lookup(models.Lookup):
|
|
lookup_name = "div3"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, params = self.process_lhs(compiler, connection)
|
|
rhs, rhs_params = self.process_rhs(compiler, connection)
|
|
params.extend(rhs_params)
|
|
return "(%s) %%%% 3 = %s" % (lhs, rhs), params
|
|
|
|
def as_oracle(self, compiler, connection):
|
|
lhs, params = self.process_lhs(compiler, connection)
|
|
rhs, rhs_params = self.process_rhs(compiler, connection)
|
|
params.extend(rhs_params)
|
|
return "mod(%s, 3) = %s" % (lhs, rhs), params
|
|
|
|
|
|
class Div3Transform(models.Transform):
|
|
lookup_name = "div3"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, lhs_params = compiler.compile(self.lhs)
|
|
return "(%s) %%%% 3" % lhs, lhs_params
|
|
|
|
def as_oracle(self, compiler, connection, **extra_context):
|
|
lhs, lhs_params = compiler.compile(self.lhs)
|
|
return "mod(%s, 3)" % lhs, lhs_params
|
|
|
|
|
|
class Div3BilateralTransform(Div3Transform):
|
|
bilateral = True
|
|
|
|
|
|
class Mult3BilateralTransform(models.Transform):
|
|
bilateral = True
|
|
lookup_name = "mult3"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, lhs_params = compiler.compile(self.lhs)
|
|
return "3 * (%s)" % lhs, lhs_params
|
|
|
|
|
|
class LastDigitTransform(models.Transform):
|
|
lookup_name = "lastdigit"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, lhs_params = compiler.compile(self.lhs)
|
|
return "SUBSTR(CAST(%s AS CHAR(2)), 2, 1)" % lhs, lhs_params
|
|
|
|
|
|
class UpperBilateralTransform(models.Transform):
|
|
bilateral = True
|
|
lookup_name = "upper"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, lhs_params = compiler.compile(self.lhs)
|
|
return "UPPER(%s)" % lhs, lhs_params
|
|
|
|
|
|
class YearTransform(models.Transform):
|
|
# Use a name that avoids collision with the built-in year lookup.
|
|
lookup_name = "testyear"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs_sql, params = compiler.compile(self.lhs)
|
|
return connection.ops.date_extract_sql("year", lhs_sql, params)
|
|
|
|
@property
|
|
def output_field(self):
|
|
return models.IntegerField()
|
|
|
|
|
|
@YearTransform.register_lookup
|
|
class YearExact(models.lookups.Lookup):
|
|
lookup_name = "exact"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
# We will need to skip the extract part, and instead go
|
|
# directly with the originating field, that is self.lhs.lhs
|
|
lhs_sql, lhs_params = self.process_lhs(compiler, connection, self.lhs.lhs)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
# Note that we must be careful so that we have params in the
|
|
# same order as we have the parts in the SQL.
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
# We use PostgreSQL specific SQL here. Note that we must do the
|
|
# conversions in SQL instead of in Python to support F() references.
|
|
return (
|
|
"%(lhs)s >= (%(rhs)s || '-01-01')::date "
|
|
"AND %(lhs)s <= (%(rhs)s || '-12-31')::date"
|
|
% {"lhs": lhs_sql, "rhs": rhs_sql},
|
|
params,
|
|
)
|
|
|
|
|
|
@YearTransform.register_lookup
|
|
class YearLte(models.lookups.LessThanOrEqual):
|
|
"""
|
|
The purpose of this lookup is to efficiently compare the year of the field.
|
|
"""
|
|
|
|
def as_sql(self, compiler, connection):
|
|
# Skip the YearTransform above us (no possibility for efficient
|
|
# lookup otherwise).
|
|
real_lhs = self.lhs.lhs
|
|
lhs_sql, params = self.process_lhs(compiler, connection, real_lhs)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
params.extend(rhs_params)
|
|
# Build SQL where the integer year is concatenated with last month
|
|
# and day, then convert that to date. (We try to have SQL like:
|
|
# WHERE somecol <= '2013-12-31')
|
|
# but also make it work if the rhs_sql is field reference.
|
|
return "%s <= (%s || '-12-31')::date" % (lhs_sql, rhs_sql), params
|
|
|
|
|
|
class Exactly(models.lookups.Exact):
|
|
"""
|
|
This lookup is used to test lookup registration.
|
|
"""
|
|
|
|
lookup_name = "exactly"
|
|
|
|
def get_rhs_op(self, connection, rhs):
|
|
return connection.operators["exact"] % rhs
|
|
|
|
|
|
class SQLFuncMixin:
|
|
def as_sql(self, compiler, connection):
|
|
return "%s()" % self.name, []
|
|
|
|
@property
|
|
def output_field(self):
|
|
return CustomField()
|
|
|
|
|
|
class SQLFuncLookup(SQLFuncMixin, models.Lookup):
|
|
def __init__(self, name, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self.name = name
|
|
|
|
|
|
class SQLFuncTransform(SQLFuncMixin, models.Transform):
|
|
def __init__(self, name, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self.name = name
|
|
|
|
|
|
class SQLFuncFactory:
|
|
def __init__(self, key, name):
|
|
self.key = key
|
|
self.name = name
|
|
|
|
def __call__(self, *args, **kwargs):
|
|
if self.key == "lookupfunc":
|
|
return SQLFuncLookup(self.name, *args, **kwargs)
|
|
return SQLFuncTransform(self.name, *args, **kwargs)
|
|
|
|
|
|
class CustomField(models.TextField):
|
|
def get_lookup(self, lookup_name):
|
|
if lookup_name.startswith("lookupfunc_"):
|
|
key, name = lookup_name.split("_", 1)
|
|
return SQLFuncFactory(key, name)
|
|
return super().get_lookup(lookup_name)
|
|
|
|
def get_transform(self, lookup_name):
|
|
if lookup_name.startswith("transformfunc_"):
|
|
key, name = lookup_name.split("_", 1)
|
|
return SQLFuncFactory(key, name)
|
|
return super().get_transform(lookup_name)
|
|
|
|
|
|
class CustomModel(models.Model):
|
|
field = CustomField()
|
|
|
|
|
|
# We will register this class temporarily in the test method.
|
|
|
|
|
|
class InMonth(models.lookups.Lookup):
|
|
"""
|
|
InMonth matches if the column's month is the same as value's month.
|
|
"""
|
|
|
|
lookup_name = "inmonth"
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, lhs_params = self.process_lhs(compiler, connection)
|
|
rhs, rhs_params = self.process_rhs(compiler, connection)
|
|
# We need to be careful so that we get the params in right
|
|
# places.
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
return (
|
|
"%s >= date_trunc('month', %s) and "
|
|
"%s < date_trunc('month', %s) + interval '1 months'" % (lhs, rhs, lhs, rhs),
|
|
params,
|
|
)
|
|
|
|
|
|
class DateTimeTransform(models.Transform):
|
|
lookup_name = "as_datetime"
|
|
|
|
@property
|
|
def output_field(self):
|
|
return models.DateTimeField()
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs, params = compiler.compile(self.lhs)
|
|
return "from_unixtime({})".format(lhs), params
|
|
|
|
|
|
class LookupTests(TestCase):
|
|
def test_custom_name_lookup(self):
|
|
a1 = Author.objects.create(name="a1", birthdate=date(1981, 2, 16))
|
|
Author.objects.create(name="a2", birthdate=date(2012, 2, 29))
|
|
with register_lookup(models.DateField, YearTransform), register_lookup(
|
|
models.DateField, YearTransform, lookup_name="justtheyear"
|
|
), register_lookup(YearTransform, Exactly), register_lookup(
|
|
YearTransform, Exactly, lookup_name="isactually"
|
|
):
|
|
qs1 = Author.objects.filter(birthdate__testyear__exactly=1981)
|
|
qs2 = Author.objects.filter(birthdate__justtheyear__isactually=1981)
|
|
self.assertSequenceEqual(qs1, [a1])
|
|
self.assertSequenceEqual(qs2, [a1])
|
|
|
|
def test_custom_exact_lookup_none_rhs(self):
|
|
"""
|
|
__exact=None is transformed to __isnull=True if a custom lookup class
|
|
with lookup_name != 'exact' is registered as the `exact` lookup.
|
|
"""
|
|
field = Author._meta.get_field("birthdate")
|
|
OldExactLookup = field.get_lookup("exact")
|
|
author = Author.objects.create(name="author", birthdate=None)
|
|
try:
|
|
field.register_lookup(Exactly, "exact")
|
|
self.assertEqual(Author.objects.get(birthdate__exact=None), author)
|
|
finally:
|
|
field.register_lookup(OldExactLookup, "exact")
|
|
|
|
def test_basic_lookup(self):
|
|
a1 = Author.objects.create(name="a1", age=1)
|
|
a2 = Author.objects.create(name="a2", age=2)
|
|
a3 = Author.objects.create(name="a3", age=3)
|
|
a4 = Author.objects.create(name="a4", age=4)
|
|
with register_lookup(models.IntegerField, Div3Lookup):
|
|
self.assertSequenceEqual(Author.objects.filter(age__div3=0), [a3])
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(age__div3=1).order_by("age"), [a1, a4]
|
|
)
|
|
self.assertSequenceEqual(Author.objects.filter(age__div3=2), [a2])
|
|
self.assertSequenceEqual(Author.objects.filter(age__div3=3), [])
|
|
|
|
@unittest.skipUnless(
|
|
connection.vendor == "postgresql", "PostgreSQL specific SQL used"
|
|
)
|
|
def test_birthdate_month(self):
|
|
a1 = Author.objects.create(name="a1", birthdate=date(1981, 2, 16))
|
|
a2 = Author.objects.create(name="a2", birthdate=date(2012, 2, 29))
|
|
a3 = Author.objects.create(name="a3", birthdate=date(2012, 1, 31))
|
|
a4 = Author.objects.create(name="a4", birthdate=date(2012, 3, 1))
|
|
with register_lookup(models.DateField, InMonth):
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(birthdate__inmonth=date(2012, 1, 15)), [a3]
|
|
)
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(birthdate__inmonth=date(2012, 2, 1)), [a2]
|
|
)
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(birthdate__inmonth=date(1981, 2, 28)), [a1]
|
|
)
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(birthdate__inmonth=date(2012, 3, 12)), [a4]
|
|
)
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(birthdate__inmonth=date(2012, 4, 1)), []
|
|
)
|
|
|
|
def test_div3_extract(self):
|
|
with register_lookup(models.IntegerField, Div3Transform):
|
|
a1 = Author.objects.create(name="a1", age=1)
|
|
a2 = Author.objects.create(name="a2", age=2)
|
|
a3 = Author.objects.create(name="a3", age=3)
|
|
a4 = Author.objects.create(name="a4", age=4)
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertSequenceEqual(baseqs.filter(age__div3=2), [a2])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__lte=3), [a1, a2, a3, a4])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__in=[0, 2]), [a2, a3])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__in=[2, 4]), [a2])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__gte=3), [])
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(age__div3__range=(1, 2)), [a1, a2, a4]
|
|
)
|
|
|
|
def test_foreignobject_lookup_registration(self):
|
|
field = Article._meta.get_field("author")
|
|
|
|
with register_lookup(models.ForeignObject, Exactly):
|
|
self.assertIs(field.get_lookup("exactly"), Exactly)
|
|
|
|
# ForeignObject should ignore regular Field lookups
|
|
with register_lookup(models.Field, Exactly):
|
|
self.assertIsNone(field.get_lookup("exactly"))
|
|
|
|
def test_lookups_caching(self):
|
|
field = Article._meta.get_field("author")
|
|
|
|
# clear and re-cache
|
|
field.get_lookups.cache_clear()
|
|
self.assertNotIn("exactly", field.get_lookups())
|
|
|
|
# registration should bust the cache
|
|
with register_lookup(models.ForeignObject, Exactly):
|
|
# getting the lookups again should re-cache
|
|
self.assertIn("exactly", field.get_lookups())
|
|
# Unregistration should bust the cache.
|
|
self.assertNotIn("exactly", field.get_lookups())
|
|
|
|
|
|
class BilateralTransformTests(TestCase):
|
|
def test_bilateral_upper(self):
|
|
with register_lookup(models.CharField, UpperBilateralTransform):
|
|
author1 = Author.objects.create(name="Doe")
|
|
author2 = Author.objects.create(name="doe")
|
|
author3 = Author.objects.create(name="Foo")
|
|
self.assertCountEqual(
|
|
Author.objects.filter(name__upper="doe"),
|
|
[author1, author2],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Author.objects.filter(name__upper__contains="f"),
|
|
[author3],
|
|
)
|
|
|
|
def test_bilateral_inner_qs(self):
|
|
with register_lookup(models.CharField, UpperBilateralTransform):
|
|
msg = "Bilateral transformations on nested querysets are not implemented."
|
|
with self.assertRaisesMessage(NotImplementedError, msg):
|
|
Author.objects.filter(
|
|
name__upper__in=Author.objects.values_list("name")
|
|
)
|
|
|
|
def test_bilateral_multi_value(self):
|
|
with register_lookup(models.CharField, UpperBilateralTransform):
|
|
Author.objects.bulk_create(
|
|
[
|
|
Author(name="Foo"),
|
|
Author(name="Bar"),
|
|
Author(name="Ray"),
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Author.objects.filter(name__upper__in=["foo", "bar", "doe"]).order_by(
|
|
"name"
|
|
),
|
|
["Bar", "Foo"],
|
|
lambda a: a.name,
|
|
)
|
|
|
|
def test_div3_bilateral_extract(self):
|
|
with register_lookup(models.IntegerField, Div3BilateralTransform):
|
|
a1 = Author.objects.create(name="a1", age=1)
|
|
a2 = Author.objects.create(name="a2", age=2)
|
|
a3 = Author.objects.create(name="a3", age=3)
|
|
a4 = Author.objects.create(name="a4", age=4)
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertSequenceEqual(baseqs.filter(age__div3=2), [a2])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__lte=3), [a3])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__in=[0, 2]), [a2, a3])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__in=[2, 4]), [a1, a2, a4])
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__gte=3), [a1, a2, a3, a4])
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(age__div3__range=(1, 2)), [a1, a2, a4]
|
|
)
|
|
|
|
def test_bilateral_order(self):
|
|
with register_lookup(
|
|
models.IntegerField, Mult3BilateralTransform, Div3BilateralTransform
|
|
):
|
|
a1 = Author.objects.create(name="a1", age=1)
|
|
a2 = Author.objects.create(name="a2", age=2)
|
|
a3 = Author.objects.create(name="a3", age=3)
|
|
a4 = Author.objects.create(name="a4", age=4)
|
|
baseqs = Author.objects.order_by("name")
|
|
|
|
# mult3__div3 always leads to 0
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(age__mult3__div3=42), [a1, a2, a3, a4]
|
|
)
|
|
self.assertSequenceEqual(baseqs.filter(age__div3__mult3=42), [a3])
|
|
|
|
def test_transform_order_by(self):
|
|
with register_lookup(models.IntegerField, LastDigitTransform):
|
|
a1 = Author.objects.create(name="a1", age=11)
|
|
a2 = Author.objects.create(name="a2", age=23)
|
|
a3 = Author.objects.create(name="a3", age=32)
|
|
a4 = Author.objects.create(name="a4", age=40)
|
|
qs = Author.objects.order_by("age__lastdigit")
|
|
self.assertSequenceEqual(qs, [a4, a1, a3, a2])
|
|
|
|
def test_bilateral_fexpr(self):
|
|
with register_lookup(models.IntegerField, Mult3BilateralTransform):
|
|
a1 = Author.objects.create(name="a1", age=1, average_rating=3.2)
|
|
a2 = Author.objects.create(name="a2", age=2, average_rating=0.5)
|
|
a3 = Author.objects.create(name="a3", age=3, average_rating=1.5)
|
|
a4 = Author.objects.create(name="a4", age=4)
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(age__mult3=models.F("age")), [a1, a2, a3, a4]
|
|
)
|
|
# Same as age >= average_rating
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(age__mult3__gte=models.F("average_rating")), [a2, a3]
|
|
)
|
|
|
|
|
|
@override_settings(USE_TZ=True)
|
|
class DateTimeLookupTests(TestCase):
|
|
@unittest.skipUnless(connection.vendor == "mysql", "MySQL specific SQL used")
|
|
def test_datetime_output_field(self):
|
|
with register_lookup(models.PositiveIntegerField, DateTimeTransform):
|
|
ut = MySQLUnixTimestamp.objects.create(timestamp=time.time())
|
|
y2k = timezone.make_aware(datetime(2000, 1, 1))
|
|
self.assertSequenceEqual(
|
|
MySQLUnixTimestamp.objects.filter(timestamp__as_datetime__gt=y2k), [ut]
|
|
)
|
|
|
|
|
|
class YearLteTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.a1 = Author.objects.create(name="a1", birthdate=date(1981, 2, 16))
|
|
cls.a2 = Author.objects.create(name="a2", birthdate=date(2012, 2, 29))
|
|
cls.a3 = Author.objects.create(name="a3", birthdate=date(2012, 1, 31))
|
|
cls.a4 = Author.objects.create(name="a4", birthdate=date(2012, 3, 1))
|
|
|
|
def setUp(self):
|
|
models.DateField.register_lookup(YearTransform)
|
|
|
|
def tearDown(self):
|
|
models.DateField._unregister_lookup(YearTransform)
|
|
|
|
@unittest.skipUnless(
|
|
connection.vendor == "postgresql", "PostgreSQL specific SQL used"
|
|
)
|
|
def test_year_lte(self):
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(birthdate__testyear__lte=2012),
|
|
[self.a1, self.a2, self.a3, self.a4],
|
|
)
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(birthdate__testyear=2012), [self.a2, self.a3, self.a4]
|
|
)
|
|
|
|
self.assertNotIn("BETWEEN", str(baseqs.filter(birthdate__testyear=2012).query))
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(birthdate__testyear__lte=2011), [self.a1]
|
|
)
|
|
# The non-optimized version works, too.
|
|
self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lt=2012), [self.a1])
|
|
|
|
@unittest.skipUnless(
|
|
connection.vendor == "postgresql", "PostgreSQL specific SQL used"
|
|
)
|
|
def test_year_lte_fexpr(self):
|
|
self.a2.age = 2011
|
|
self.a2.save()
|
|
self.a3.age = 2012
|
|
self.a3.save()
|
|
self.a4.age = 2013
|
|
self.a4.save()
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(birthdate__testyear__lte=models.F("age")), [self.a3, self.a4]
|
|
)
|
|
self.assertSequenceEqual(
|
|
baseqs.filter(birthdate__testyear__lt=models.F("age")), [self.a4]
|
|
)
|
|
|
|
def test_year_lte_sql(self):
|
|
# This test will just check the generated SQL for __lte. This
|
|
# doesn't require running on PostgreSQL and spots the most likely
|
|
# error - not running YearLte SQL at all.
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertIn(
|
|
"<= (2011 || ", str(baseqs.filter(birthdate__testyear__lte=2011).query)
|
|
)
|
|
self.assertIn("-12-31", str(baseqs.filter(birthdate__testyear__lte=2011).query))
|
|
|
|
def test_postgres_year_exact(self):
|
|
baseqs = Author.objects.order_by("name")
|
|
self.assertIn("= (2011 || ", str(baseqs.filter(birthdate__testyear=2011).query))
|
|
self.assertIn("-12-31", str(baseqs.filter(birthdate__testyear=2011).query))
|
|
|
|
def test_custom_implementation_year_exact(self):
|
|
try:
|
|
# Two ways to add a customized implementation for different backends:
|
|
# First is MonkeyPatch of the class.
|
|
def as_custom_sql(self, compiler, connection):
|
|
lhs_sql, lhs_params = self.process_lhs(
|
|
compiler, connection, self.lhs.lhs
|
|
)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
return (
|
|
"%(lhs)s >= "
|
|
"str_to_date(concat(%(rhs)s, '-01-01'), '%%%%Y-%%%%m-%%%%d') "
|
|
"AND %(lhs)s <= "
|
|
"str_to_date(concat(%(rhs)s, '-12-31'), '%%%%Y-%%%%m-%%%%d')"
|
|
% {"lhs": lhs_sql, "rhs": rhs_sql},
|
|
params,
|
|
)
|
|
|
|
setattr(YearExact, "as_" + connection.vendor, as_custom_sql)
|
|
self.assertIn(
|
|
"concat(", str(Author.objects.filter(birthdate__testyear=2012).query)
|
|
)
|
|
finally:
|
|
delattr(YearExact, "as_" + connection.vendor)
|
|
try:
|
|
# The other way is to subclass the original lookup and register the
|
|
# subclassed lookup instead of the original.
|
|
class CustomYearExact(YearExact):
|
|
# This method should be named "as_mysql" for MySQL,
|
|
# "as_postgresql" for postgres and so on, but as we don't know
|
|
# which DB we are running on, we need to use setattr.
|
|
def as_custom_sql(self, compiler, connection):
|
|
lhs_sql, lhs_params = self.process_lhs(
|
|
compiler, connection, self.lhs.lhs
|
|
)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
return (
|
|
"%(lhs)s >= "
|
|
"str_to_date(CONCAT(%(rhs)s, '-01-01'), '%%%%Y-%%%%m-%%%%d') "
|
|
"AND %(lhs)s <= "
|
|
"str_to_date(CONCAT(%(rhs)s, '-12-31'), '%%%%Y-%%%%m-%%%%d')"
|
|
% {"lhs": lhs_sql, "rhs": rhs_sql},
|
|
params,
|
|
)
|
|
|
|
setattr(
|
|
CustomYearExact,
|
|
"as_" + connection.vendor,
|
|
CustomYearExact.as_custom_sql,
|
|
)
|
|
YearTransform.register_lookup(CustomYearExact)
|
|
self.assertIn(
|
|
"CONCAT(", str(Author.objects.filter(birthdate__testyear=2012).query)
|
|
)
|
|
finally:
|
|
YearTransform._unregister_lookup(CustomYearExact)
|
|
YearTransform.register_lookup(YearExact)
|
|
|
|
|
|
class TrackCallsYearTransform(YearTransform):
|
|
# Use a name that avoids collision with the built-in year lookup.
|
|
lookup_name = "testyear"
|
|
call_order = []
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs_sql, params = compiler.compile(self.lhs)
|
|
return connection.ops.date_extract_sql("year", lhs_sql), params
|
|
|
|
@property
|
|
def output_field(self):
|
|
return models.IntegerField()
|
|
|
|
def get_lookup(self, lookup_name):
|
|
self.call_order.append("lookup")
|
|
return super().get_lookup(lookup_name)
|
|
|
|
def get_transform(self, lookup_name):
|
|
self.call_order.append("transform")
|
|
return super().get_transform(lookup_name)
|
|
|
|
|
|
class LookupTransformCallOrderTests(SimpleTestCase):
|
|
def test_call_order(self):
|
|
with register_lookup(models.DateField, TrackCallsYearTransform):
|
|
# junk lookup - tries lookup, then transform, then fails
|
|
msg = (
|
|
"Unsupported lookup 'junk' for IntegerField or join on the field not "
|
|
"permitted."
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Author.objects.filter(birthdate__testyear__junk=2012)
|
|
self.assertEqual(
|
|
TrackCallsYearTransform.call_order, ["lookup", "transform"]
|
|
)
|
|
TrackCallsYearTransform.call_order = []
|
|
# junk transform - tries transform only, then fails
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Author.objects.filter(birthdate__testyear__junk__more_junk=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order, ["transform"])
|
|
TrackCallsYearTransform.call_order = []
|
|
# Just getting the year (implied __exact) - lookup only
|
|
Author.objects.filter(birthdate__testyear=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order, ["lookup"])
|
|
TrackCallsYearTransform.call_order = []
|
|
# Just getting the year (explicit __exact) - lookup only
|
|
Author.objects.filter(birthdate__testyear__exact=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order, ["lookup"])
|
|
|
|
|
|
class CustomisedMethodsTests(SimpleTestCase):
|
|
def test_overridden_get_lookup(self):
|
|
q = CustomModel.objects.filter(field__lookupfunc_monkeys=3)
|
|
self.assertIn("monkeys()", str(q.query))
|
|
|
|
def test_overridden_get_transform(self):
|
|
q = CustomModel.objects.filter(field__transformfunc_banana=3)
|
|
self.assertIn("banana()", str(q.query))
|
|
|
|
def test_overridden_get_lookup_chain(self):
|
|
q = CustomModel.objects.filter(
|
|
field__transformfunc_banana__lookupfunc_elephants=3
|
|
)
|
|
self.assertIn("elephants()", str(q.query))
|
|
|
|
def test_overridden_get_transform_chain(self):
|
|
q = CustomModel.objects.filter(
|
|
field__transformfunc_banana__transformfunc_pear=3
|
|
)
|
|
self.assertIn("pear()", str(q.query))
|
|
|
|
|
|
class SubqueryTransformTests(TestCase):
|
|
def test_subquery_usage(self):
|
|
with register_lookup(models.IntegerField, Div3Transform):
|
|
Author.objects.create(name="a1", age=1)
|
|
a2 = Author.objects.create(name="a2", age=2)
|
|
Author.objects.create(name="a3", age=3)
|
|
Author.objects.create(name="a4", age=4)
|
|
qs = Author.objects.order_by("name").filter(
|
|
id__in=Author.objects.filter(age__div3=2)
|
|
)
|
|
self.assertSequenceEqual(qs, [a2])
|