table_name = ''
to_save: list[str] = []
id_: None | BaseModelId
- cache_: dict[BaseModelId, Self] = {}
+ cache_: dict[BaseModelId, Self]
@classmethod
def from_table_row(cls: type[BaseModelInstance],
id_: BaseModelId) -> BaseModelInstance | None:
"""Get object of id_ from class's cache, or None if not found."""
# pylint: disable=consider-iterating-dictionary
- if id_ in cls.cache_.keys():
- obj = cls.cache_[id_]
+ cache = cls.get_cache()
+ if id_ in cache.keys():
+ obj = cache[id_]
assert isinstance(obj, cls)
return obj
return None
"""Update object in class's cache."""
if self.id_ is None:
raise HandledException('Cannot cache object without ID.')
- self.__class__.cache_[self.id_] = self
+ cache = self.__class__.get_cache()
+ cache[self.id_] = self
def uncache(self) -> None:
"""Remove self from cache."""
if self.id_ is None:
raise HandledException('Cannot un-cache object without ID.')
- del self.__class__.cache_[self.id_]
+ cache = self.__class__.get_cache()
+ del cache[self.id_]
@classmethod
def empty_cache(cls) -> None:
"""Empty class's cache."""
cls.cache_ = {}
+
+ @classmethod
+ def all(cls: type[BaseModelInstance],
+ db_conn: DatabaseConnection) -> list[BaseModelInstance]:
+ """Collect all objects of class."""
+ items: dict[BaseModelId, BaseModelInstance] = {}
+ for k, v in cls.get_cache().items():
+ assert isinstance(v, cls)
+ items[k] = v
+ already_recorded = items.keys()
+ for id_ in db_conn.column_all(cls.table_name, 'id'):
+ if id_ not in already_recorded:
+ # pylint: disable=no-member
+ item = cls.by_id(db_conn, id_) # type: ignore[attr-defined]
+ items[item.id_] = item
+ return list(items.values())
+
+ @classmethod
+ def get_cache(cls: type[BaseModelInstance]) -> dict[Any, BaseModel[Any]]:
+ """Get cache dictionary, create it if not yet existing."""
+ if not hasattr(cls, 'cache_'):
+ d: dict[Any, BaseModel[Any]] = {}
+ cls.cache_ = d
+ return cls.cache_