self.is_done = is_done
self.day = day
- def __eq__(self, other: object) -> bool:
- return isinstance(other, self.__class__) and self.id_ == other.id_
-
@classmethod
- def from_table_row(cls, row: Row, db_conn: DatabaseConnection) -> Todo:
- """Make Todo from database row."""
- return cls(id_=row[0],
+ def from_table_row(cls, db_conn: DatabaseConnection, row: Row) -> Todo:
+ """Make Todo from database row, write to DB cache."""
+ todo = cls(id_=row[0],
process=Process.by_id(db_conn, row[1]),
is_done=row[2],
day=Day.by_date(db_conn, row[3]))
+ assert todo.id_ is not None
+ db_conn.cached_todos[todo.id_] = todo
+ return todo
@classmethod
def by_id(cls, db_conn: DatabaseConnection, id_: int) -> Todo:
- """Get Todo of .id_=id_."""
+ """Get Todo of .id_=id_ – from DB cache if possible."""
+ if id_ in db_conn.cached_todos.keys():
+ todo = db_conn.cached_todos[id_]
+ assert isinstance(todo, Todo)
+ return todo
for row in db_conn.exec('SELECT * FROM todos WHERE id = ?', (id_,)):
- return cls.from_table_row(row, db_conn)
+ return cls.from_table_row(db_conn, row)
raise NotFoundException(f'Todo of ID not found: {id_}')
@classmethod
def by_date(cls, db_conn: DatabaseConnection, date: str) -> list[Todo]:
"""Collect all Todos for Day of date."""
todos = []
- for row in db_conn.exec('SELECT * FROM todos WHERE day = ?', (date,)):
- todos += [cls.from_table_row(row, db_conn)]
+ for row in db_conn.exec('SELECT id FROM todos WHERE day = ?', (date,)):
+ todos += [cls.by_id(db_conn, row[0])]
return todos
def save(self, db_conn: DatabaseConnection) -> None:
- """Write self to DB."""
+ """Write self to DB and its cache."""
if self.process.id_ is None:
raise NotFoundException('Process of Todo without ID (not saved?)')
cursor = db_conn.exec('REPLACE INTO todos VALUES (?,?,?,?)',
(self.id_, self.process.id_,
self.is_done, self.day.date))
self.id_ = cursor.lastrowid
+ assert self.id_ is not None
+ db_conn.cached_todos[self.id_] = self