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feat(api): Make RESTManager generic on RESTObject class
Currently mixins like ListMixin are type hinted to return base RESTObject instead of a specific class like `MergeRequest`. The GetMixin and GetWithoutIdMixin solve this problem by defining a new `get` method for every defined class. However, this creates a lot of duplicated code. Make RESTManager use `typing.Generic` as its base class and use and assign the declared TypeVar to the `_obj_cls` attribute as a type of the passed class. Make both `_obj_cls` and `_path` attributes an abstract properties so that type checkers can check that those attributes were properly defined in subclasses. Mypy will only check then the class is instantiated which makes non-final subclasses possible. Unfortunately pylint will check the declarations not instantiations so add `# pylint: disable=abstract-method` comments to all non-final subclasses like ListMixin. Make `_path` attribute always be `str` instead of sometimes `None`. This eliminates unnecessary type checks. Change all mixins like ListMixin or GetMixin to a subclass. This makes the attribute declarations much cleaner as for example `_list_filters` is now the only attribute defined by ListMixin. Change SidekiqManager to not inherit from RESTManager and only copy its `__init__` method. This is because SidekiqManager never was a real manager and does not define `_path` or `_obj_cls`. Delete `tests/unit/meta/test_ensure_type_hints.py` file as the `get` method is no required to be defined for every class. Signed-off-by: Igor Ponomarev <[email protected]>
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‎gitlab/base.py‎

Lines changed: 30 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -3,8 +3,19 @@
33
import json
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import pprint
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import textwrap
6+
from abc import ABCMeta, abstractmethod
67
from types import ModuleType
7-
from typing import Any, Dict, Iterable, Optional, Type, TYPE_CHECKING, Union
8+
from typing import (
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Any,
10+
Dict,
11+
Generic,
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Iterable,
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Optional,
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Type,
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TYPE_CHECKING,
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TypeVar,
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Union,
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)
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920
import gitlab
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from gitlab import types as g_types
@@ -48,11 +59,11 @@ class RESTObject:
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_repr_attr: Optional[str] = None
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_updated_attrs: Dict[str, Any]
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_lazy: bool
51-
manager: "RESTManager"
62+
manager: "RESTManager[Any]"
5263

5364
def __init__(
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self,
55-
manager: "RESTManager",
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manager: "RESTManager[Any]",
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attrs: Dict[str, Any],
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*,
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created_from_list: bool = False,
@@ -269,7 +280,7 @@ class RESTObjectList:
269280
"""
270281

271282
def __init__(
272-
self, manager: "RESTManager", obj_cls: Type[RESTObject], _list: GitlabList
283+
self, manager: "RESTManager[Any]", obj_cls: Type[RESTObject], _list: GitlabList
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) -> None:
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"""Creates an objects list from a GitlabList.
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@@ -335,7 +346,10 @@ def total(self) -> Optional[int]:
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return self._list.total
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337348

338-
class RESTManager:
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TObjCls = TypeVar("TObjCls", bound=RESTObject)
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class RESTManager(Generic[TObjCls], metaclass=ABCMeta):
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"""Base class for CRUD operations on objects.
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Derived class must define ``_path`` and ``_obj_cls``.
@@ -346,16 +360,22 @@ class RESTManager:
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_create_attrs: g_types.RequiredOptional = g_types.RequiredOptional()
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_update_attrs: g_types.RequiredOptional = g_types.RequiredOptional()
349-
_path: Optional[str] = None
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_obj_cls: Optional[Type[RESTObject]] = None
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_from_parent_attrs: Dict[str, Any] = {}
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_types: Dict[str, Type[g_types.GitlabAttribute]] = {}
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354-
_computed_path: Optional[str]
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_computed_path: str
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_parent: Optional[RESTObject]
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_parent_attrs: Dict[str, Any]
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gitlab: Gitlab
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371+
@property
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@abstractmethod
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def _path(self) -> str: ...
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375+
@property
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@abstractmethod
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def _obj_cls(self) -> type[TObjCls]: ...
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def __init__(self, gl: Gitlab, parent: Optional[RESTObject] = None) -> None:
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"""REST manager constructor.
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@@ -371,12 +391,10 @@ def __init__(self, gl: Gitlab, parent: Optional[RESTObject] = None) -> None:
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def parent_attrs(self) -> Optional[Dict[str, Any]]:
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return self._parent_attrs
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374-
def _compute_path(self, path: Optional[str] = None) -> Optional[str]:
394+
def _compute_path(self, path: Optional[str] = None) -> str:
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self._parent_attrs = {}
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if path is None:
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path = self._path
378-
if path is None:
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return None
380398
if self._parent is None or not self._from_parent_attrs:
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return path
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@@ -390,5 +408,5 @@ def _compute_path(self, path: Optional[str] = None) -> Optional[str]:
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return path.format(**data)
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392410
@property
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def path(self) -> Optional[str]:
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def path(self) -> str:
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return self._computed_path

‎gitlab/client.py‎

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -397,10 +397,11 @@ def auth(self) -> None:
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The `user` attribute will hold a `gitlab.objects.CurrentUser` object on
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success.
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"""
400-
self.user = self._objects.CurrentUserManager(self).get()
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user = self._objects.CurrentUserManager(self).get()
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self.user = user
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402-
if hasattr(self.user, "web_url") and hasattr(self.user, "username"):
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self._check_url(self.user.web_url, path=self.user.username)
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if hasattr(user, "web_url") and hasattr(user, "username"):
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self._check_url(user.web_url, path=user.username)
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405406
def version(self) -> Tuple[str, str]:
406407
"""Returns the version and revision of the gitlab server.

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