Django core cache (#1774)

* Add missing `pickle_protocol` stubs

* Fix `django.core.cache.backends.memcached` types

* Add missing exceptions classes

* Fix missing`InvalidCacheKey` re-export

* Fix template warnings

* Fix after CR

django-stubs/contrib/sessions/exceptions.pyi

@@ -1,4 +1,5 @@
-from django.core.exceptions import SuspiciousOperation
+from django.core.exceptions import BadRequest, SuspiciousOperation
 
 class InvalidSessionKey(SuspiciousOperation): ...
 class SuspiciousSession(SuspiciousOperation): ...
+class SessionInterrupted(BadRequest): ...

django-stubs/core/cache/__init__.pyi

@@ -5,6 +5,7 @@ from django.utils.connection import BaseConnectionHandler
 from .backends.base import BaseCache as BaseCache
 from .backends.base import CacheKeyWarning as CacheKeyWarning
 from .backends.base import InvalidCacheBackendError as InvalidCacheBackendError
+from .backends.base import InvalidCacheKey as InvalidCacheKey
 
 DEFAULT_CACHE_ALIAS: str
 

django-stubs/core/cache/backends/db.pyi

@@ -1,4 +1,4 @@
-from typing import Any
+from typing import Any, ClassVar
 
 from django.core.cache.backends.base import BaseCache
 from django.utils.functional import _StrOrPromise
@@ -20,4 +20,5 @@ class BaseDatabaseCache(BaseCache):
     cache_model_class: Any
     def __init__(self, table: str, params: dict[str, Any]) -> None: ...
 
-class DatabaseCache(BaseDatabaseCache): ...
+class DatabaseCache(BaseDatabaseCache):
+    pickle_protocol: ClassVar[int]

django-stubs/core/cache/backends/filebased.pyi

@@ -1,7 +1,8 @@
-from typing import Any
+from typing import Any, ClassVar
 
 from django.core.cache.backends.base import BaseCache
 
 class FileBasedCache(BaseCache):
-    cache_suffix: str
+    cache_suffix: ClassVar[str]
+    pickle_protocol: ClassVar[int]
     def __init__(self, dir: str, params: dict[str, Any]) -> None: ...

django-stubs/core/cache/backends/locmem.pyi

@@ -1,6 +1,8 @@
-from typing import Any
+from typing import Any, ClassVar
 
 from django.core.cache.backends.base import BaseCache
 
 class LocMemCache(BaseCache):
+    pickle_protocol: ClassVar[int]
+
     def __init__(self, name: str, params: dict[str, Any]) -> None: ...

django-stubs/core/cache/backends/memcached.pyi

@@ -12,12 +12,16 @@ class BaseMemcachedCache(BaseCache):
         library: ModuleType,
         value_not_found_exception: type[BaseException],
     ) -> None: ...
+    @property
+    def client_servers(self) -> Sequence[str]: ...
 
 class MemcachedCache(BaseMemcachedCache):
     def __init__(self, server: str | Sequence[str], params: dict[str, Any]) -> None: ...
 
 class PyLibMCCache(BaseMemcachedCache):
     def __init__(self, server: str | Sequence[str], params: dict[str, Any]) -> None: ...
+    @property
+    def client_servers(self) -> list[str]: ...
 
 class PyMemcacheCache(BaseMemcachedCache):
     def __init__(self, server: str | Sequence[str], params: dict[str, Any]) -> None: ...

django-stubs/core/checks/templates.pyi

@@ -6,7 +6,7 @@ from django.core.checks.messages import Error, Warning
 
 E001: Error
 E002: Error
-W001: Warning
+W003: Warning
 
 def check_setting_app_dirs_loaders(app_configs: Sequence[AppConfig] | None, **kwargs: Any) -> Sequence[Error]: ...
 def check_string_if_invalid_is_string(app_configs: Sequence[AppConfig] | None, **kwargs: Any) -> Sequence[Error]: ...

django-stubs/core/exceptions.pyi

@@ -16,6 +16,7 @@ class SuspiciousFileOperation(SuspiciousOperation): ...
 class DisallowedHost(SuspiciousOperation): ...
 class DisallowedRedirect(SuspiciousOperation): ...
 class TooManyFieldsSent(SuspiciousOperation): ...
+class TooManyFilesSent(SuspiciousOperation): ...
 class RequestDataTooBig(SuspiciousOperation): ...
 class RequestAborted(Exception): ...
 class BadRequest(Exception): ...
@@ -48,4 +49,5 @@ class ValidationError(Exception):
     def __iter__(self) -> Iterator[tuple[str, list[str]] | str]: ...
 
 class EmptyResultSet(Exception): ...
+class FullResultSet(Exception): ...
 class SynchronousOnlyOperation(Exception): ...

scripts/stubtest/allowlist.txt

@@ -110,3 +110,6 @@ django.views.generic.edit.BaseDeleteView.form_class
 # We still keep them in stubs to be a bit more backward compatible.
 # RemovedInDjango40:
 django.middleware.csrf.REASON_BAD_TOKEN
+
+# RemovedInDjango41
+django.core.cache.backends.memcached.MemcachedCache

scripts/stubtest/allowlist_todo.txt

@@ -795,7 +795,6 @@ django.contrib.sessions.base_session.AbstractBaseSession.get_previous_by_expire_
 django.contrib.sessions.base_session.AbstractBaseSession.session_data
 django.contrib.sessions.base_session.AbstractBaseSession.session_key
 django.contrib.sessions.base_session.BaseSessionManager.__slotnames__
-django.contrib.sessions.exceptions.SessionInterrupted
 django.contrib.sessions.management.commands.clearsessions.Command.handle
 django.contrib.sessions.models.Session.expire_date
 django.contrib.sessions.models.Session.get_next_by_expire_date
@@ -818,19 +817,8 @@ django.contrib.staticfiles.finders.FileSystemFinder.__init__
 django.contrib.staticfiles.management.commands.collectstatic
 django.contrib.staticfiles.management.commands.findstatic.Command.handle_label
 django.contrib.staticfiles.storage
-django.core.cache.InvalidCacheKey
-django.core.cache.backends.db.DatabaseCache.pickle_protocol
-django.core.cache.backends.filebased.FileBasedCache.pickle_protocol
-django.core.cache.backends.locmem.LocMemCache.pickle_protocol
-django.core.cache.backends.memcached.BaseMemcachedCache.client_servers
-django.core.cache.backends.memcached.MemcachedCache
-django.core.cache.backends.memcached.PyLibMCCache.client_servers
 django.core.cache.cache
 django.core.checks.registry.CheckRegistry.register
-django.core.checks.templates.W001
-django.core.checks.templates.W003
-django.core.exceptions.FullResultSet
-django.core.exceptions.TooManyFilesSent
 django.core.files.File.__next__
 django.core.files.File.size
 django.core.files.base.ContentFile.size