本文整理汇总了Python中django.db.models.lookups.Exact方法的典型用法代码示例。如果您正苦于以下问题：Python lookups.Exact方法的具体用法？Python lookups.Exact怎么用？Python lookups.Exact使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类django.db.models.lookups的用法示例。
在下文中一共展示了lookups.Exact方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_spanning_relations_with_custom_lookup_in_search_fields
# 需要导入模块: from django.db.models import lookups [as 别名]
# 或者: from django.db.models.lookups import Exact [as 别名]
def test_spanning_relations_with_custom_lookup_in_search_fields(self):
hype = Group.objects.create(name='The Hype')
concert = Concert.objects.create(name='Woodstock', group=hype)
vox = Musician.objects.create(name='Vox', age=20)
Membership.objects.create(music=vox, group=hype)
# Register a custom lookup on IntegerField to ensure that field
# traversing logic in ModelAdmin.get_search_results() works.
IntegerField.register_lookup(Exact, 'exactly')
try:
m = ConcertAdmin(Concert, custom_site)
m.search_fields = ['group__members__age__exactly']
request = self.factory.get('/', data={SEARCH_VAR: '20'})
request.user = self.superuser
cl = m.get_changelist_instance(request)
self.assertCountEqual(cl.queryset, [concert])
request = self.factory.get('/', data={SEARCH_VAR: '21'})
request.user = self.superuser
cl = m.get_changelist_instance(request)
self.assertCountEqual(cl.queryset, [])
finally:
IntegerField._unregister_lookup(Exact, 'exactly') 示例2: test_transform
# 需要导入模块: from django.db.models import lookups [as 别名]
# 或者: from django.db.models.lookups import Exact [as 别名]
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')) 示例3: resolve_lookup_expected_type
# 需要导入模块: from django.db.models import lookups [as 别名]
# 或者: from django.db.models.lookups import Exact [as 别名]
def resolve_lookup_expected_type(self, ctx: MethodContext, model_cls: Type[Model], lookup: str) -> MypyType:
query = Query(model_cls)
try:
lookup_parts, field_parts, is_expression = query.solve_lookup_type(lookup)
if is_expression:
return AnyType(TypeOfAny.explicit)
except FieldError as exc:
ctx.api.fail(exc.args[0], ctx.context)
return AnyType(TypeOfAny.from_error)
field = self._resolve_field_from_parts(field_parts, model_cls)
lookup_cls = None
if lookup_parts:
lookup = lookup_parts[-1]
lookup_cls = field.get_lookup(lookup)
if lookup_cls is None:
# unknown lookup
return AnyType(TypeOfAny.explicit)
if lookup_cls is None or isinstance(lookup_cls, Exact):
return self.get_field_lookup_exact_type(helpers.get_typechecker_api(ctx), field)
assert lookup_cls is not None
lookup_info = helpers.lookup_class_typeinfo(helpers.get_typechecker_api(ctx), lookup_cls)
if lookup_info is None:
return AnyType(TypeOfAny.explicit)
for lookup_base in helpers.iter_bases(lookup_info):
if lookup_base.args and isinstance(lookup_base.args[0], Instance):
lookup_type: MypyType = lookup_base.args[0]
# if it's Field, consider lookup_type a __get__ of current field
if (isinstance(lookup_type, Instance)
and lookup_type.type.fullname == fullnames.FIELD_FULLNAME):
field_info = helpers.lookup_class_typeinfo(helpers.get_typechecker_api(ctx), field.__class__)
if field_info is None:
return AnyType(TypeOfAny.explicit)
lookup_type = helpers.get_private_descriptor_type(field_info, '_pyi_private_get_type',
is_nullable=field.null)
return lookup_type
return AnyType(TypeOfAny.explicit)