- cache = getattr(db_conn, f'cached_{cls.table_name}')
- if id_ in cache.keys():
- obj = cache[id_]
- from_cache = True
- else:
- for row in db_conn.exec(f'SELECT * FROM {cls.table_name} '
- 'WHERE id = ?', (id_,)):
- obj = cls.from_table_row(db_conn, row)
- cache[id_] = obj
- break
- return obj, from_cache
-
- def set_int_id(self, id_: int | None) -> None:
- """Set id_ if >= 1 or None, else fail."""
- if (id_ is not None) and id_ < 1:
- msg = f'illegal {self.__class__.__name__} ID, must be >=1: {id_}'
+ if id_ is not None:
+ obj = cls.get_cached(id_)
+ if not obj:
+ for row in db_conn.row_where(cls.table_name, 'id', id_):
+ obj = cls.from_table_row(db_conn, row)
+ obj.cache()
+ break
+ if obj:
+ return obj
+ if create:
+ obj = cls(id_)
+ return obj
+ raise NotFoundException(f'found no object of ID {id_}')
+
+ @classmethod
+ def all(cls: type[BaseModelInstance],
+ db_conn: DatabaseConnection) -> list[BaseModelInstance]:
+ """Collect all objects of class into list.
+
+ Note that this primarily returns the contents of the cache, and only
+ _expands_ that by additional findings in the DB. This assumes the
+ cache is always instantly cleaned of any items that would be removed
+ from the DB.
+ """
+ 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:
+ item = cls.by_id(db_conn, id_)
+ assert item.id_ is not None
+ items[item.id_] = item
+ return list(items.values())
+
+ def __eq__(self, other: object) -> bool:
+ if not isinstance(other, self.__class__):
+ msg = 'cannot compare to object of different class'