mirror of
https://github.com/django/django.git
synced 2024-12-23 09:36:06 +00:00
94 lines
3.8 KiB
Python
94 lines
3.8 KiB
Python
from datetime import datetime
|
|
|
|
from django.core.exceptions import FieldError
|
|
from django.db.models import CharField, F, Q
|
|
from django.db.models.expressions import SimpleCol
|
|
from django.db.models.fields.related_lookups import RelatedIsNull
|
|
from django.db.models.functions import Lower
|
|
from django.db.models.lookups import Exact, GreaterThan, IsNull, LessThan
|
|
from django.db.models.sql.query import Query
|
|
from django.db.models.sql.where import OR
|
|
from django.test import SimpleTestCase
|
|
from django.test.utils import register_lookup
|
|
|
|
from .models import Author, Item, ObjectC, Ranking
|
|
|
|
|
|
class TestQuery(SimpleTestCase):
|
|
def test_simple_query(self):
|
|
query = Query(Author)
|
|
where = query.build_where(Q(num__gt=2))
|
|
lookup = where.children[0]
|
|
self.assertIsInstance(lookup, GreaterThan)
|
|
self.assertEqual(lookup.rhs, 2)
|
|
self.assertEqual(lookup.lhs.target, Author._meta.get_field('num'))
|
|
|
|
def test_complex_query(self):
|
|
query = Query(Author)
|
|
where = query.build_where(Q(num__gt=2) | Q(num__lt=0))
|
|
self.assertEqual(where.connector, OR)
|
|
|
|
lookup = where.children[0]
|
|
self.assertIsInstance(lookup, GreaterThan)
|
|
self.assertEqual(lookup.rhs, 2)
|
|
self.assertEqual(lookup.lhs.target, Author._meta.get_field('num'))
|
|
|
|
lookup = where.children[1]
|
|
self.assertIsInstance(lookup, LessThan)
|
|
self.assertEqual(lookup.rhs, 0)
|
|
self.assertEqual(lookup.lhs.target, Author._meta.get_field('num'))
|
|
|
|
def test_multiple_fields(self):
|
|
query = Query(Item)
|
|
where = query.build_where(Q(modified__gt=F('created')))
|
|
lookup = where.children[0]
|
|
self.assertIsInstance(lookup, GreaterThan)
|
|
self.assertIsInstance(lookup.rhs, SimpleCol)
|
|
self.assertIsInstance(lookup.lhs, SimpleCol)
|
|
self.assertEqual(lookup.rhs.target, Item._meta.get_field('created'))
|
|
self.assertEqual(lookup.lhs.target, Item._meta.get_field('modified'))
|
|
|
|
def test_transform(self):
|
|
query = Query(Author)
|
|
with register_lookup(CharField, Lower):
|
|
where = query.build_where(~Q(name__lower='foo'))
|
|
lookup = where.children[0]
|
|
self.assertIsInstance(lookup, Exact)
|
|
self.assertIsInstance(lookup.lhs, Lower)
|
|
self.assertIsInstance(lookup.lhs.lhs, SimpleCol)
|
|
self.assertEqual(lookup.lhs.lhs.target, Author._meta.get_field('name'))
|
|
|
|
def test_negated_nullable(self):
|
|
query = Query(Item)
|
|
where = query.build_where(~Q(modified__lt=datetime(2017, 1, 1)))
|
|
self.assertTrue(where.negated)
|
|
lookup = where.children[0]
|
|
self.assertIsInstance(lookup, LessThan)
|
|
self.assertEqual(lookup.lhs.target, Item._meta.get_field('modified'))
|
|
lookup = where.children[1]
|
|
self.assertIsInstance(lookup, IsNull)
|
|
self.assertEqual(lookup.lhs.target, Item._meta.get_field('modified'))
|
|
|
|
def test_foreign_key(self):
|
|
query = Query(Item)
|
|
msg = 'Joined field references are not permitted in this query'
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
query.build_where(Q(creator__num__gt=2))
|
|
|
|
def test_foreign_key_f(self):
|
|
query = Query(Ranking)
|
|
with self.assertRaises(FieldError):
|
|
query.build_where(Q(rank__gt=F('author__num')))
|
|
|
|
def test_foreign_key_exclusive(self):
|
|
query = Query(ObjectC)
|
|
where = query.build_where(Q(objecta=None) | Q(objectb=None))
|
|
a_isnull = where.children[0]
|
|
self.assertIsInstance(a_isnull, RelatedIsNull)
|
|
self.assertIsInstance(a_isnull.lhs, SimpleCol)
|
|
self.assertEqual(a_isnull.lhs.target, ObjectC._meta.get_field('objecta'))
|
|
b_isnull = where.children[1]
|
|
self.assertIsInstance(b_isnull, RelatedIsNull)
|
|
self.assertIsInstance(b_isnull.lhs, SimpleCol)
|
|
self.assertEqual(b_isnull.lhs.target, ObjectC._meta.get_field('objectb'))
|