def release(table: Table, _id: str) -> bool:
"""
Releases lock on object. Returns False if the object does not exist or is already released.
"""
if table.update({"_id": _id, "_mutex": False}, ["_id"]):
return True
return False
def lock(table: Table, id: str, attempt=0, max_attempts=0) -> bool:
"""
Attempts to acquire lock on object
"""
if table.update({"_id": id, "_mutex": True}, ["_id"]):
return True
if attempt < max_attempts:
return _BaseOperations.lock(table, id, attempt + 1, max_attempts)
else:
return False
def count(table: Table, filter_expr: dict) -> int:
return table.count(**filter_expr)
def all(table: Table) -> List[dict]:
data = list(table.all())
for i in data:
i["id"] = i["_id"]
del i["_id"]
return data
def filter(table: Table, filter_expr: dict) -> List[dict]:
data = list(table.find(**filter_expr))
for i in data:
i["id"] = i["_id"]
del i["_id"]
return data
def get_by_id(table: Table, _id: str) -> dict:
data = table.find_one(_id=_id)
data["id"] = data["_id"]
del data["_id"]
return data
def update(table: Table, data: dict) -> bool:
if data.get("id") is not None:
data["_id"] = data["id"]
del data["id"]
return table.update(data)
def delete_matching(table: Table, filter_expr: dict) -> int:
if not filter_expr:
raise ValueError("Empty dict provided")
else:
return table.delete(**filter_expr)
def delete(table: Table, db_object: DocumentModel) -> bool:
return table.delete(_id=db_object.id) == 1
def create(table: Table, db_object: DocumentModel) -> str:
object_id = table.insert(db_object.serialize())
db_object.force_set("id", object_id)
return db_object.id