prefect.server.models.task_run_states

Functions for interacting with task run state ORM objects. Intended for internal use by the Prefect REST API.

delete_task_run_state async

Delete a task run state by id.

Parameters:

Name	Type	Description	Default
session	sa.orm.Session	A database session	required
task_run_state_id	UUID	a task run state id	required

Returns:

Name	Type	Description
bool	bool	whether or not the task run state was deleted

Source code in prefect/server/models/task_run_states.py

@inject_db
async def delete_task_run_state(
    session: sa.orm.Session, task_run_state_id: UUID, db: PrefectDBInterface
) -> bool:
    """
    Delete a task run state by id.

    Args:
        session: A database session
        task_run_state_id: a task run state id

    Returns:
        bool: whether or not the task run state was deleted
    """

    result = await session.execute(
        delete(db.TaskRunState).where(db.TaskRunState.id == task_run_state_id)
    )
    return result.rowcount > 0

read_task_run_state async

Reads a task run state by id.

Parameters:

Name	Type	Description	Default
session	sa.orm.Session	A database session	required
task_run_state_id	UUID	a task run state id	required

Returns:

Type	Description
	db.TaskRunState: the task state

Source code in prefect/server/models/task_run_states.py

@inject_db
async def read_task_run_state(
    session: sa.orm.Session, task_run_state_id: UUID, db: PrefectDBInterface
):
    """
    Reads a task run state by id.

    Args:
        session: A database session
        task_run_state_id: a task run state id

    Returns:
        db.TaskRunState: the task state
    """

    return await session.get(db.TaskRunState, task_run_state_id)

read_task_run_states async

Reads task runs states for a task run.

Parameters:

Name	Type	Description	Default
session	sa.orm.Session	A database session	required
task_run_id	UUID	the task run id	required

Returns:

Type	Description
	List[db.TaskRunState]: the task run states

Source code in prefect/server/models/task_run_states.py

@inject_db
async def read_task_run_states(
    session: sa.orm.Session, task_run_id: UUID, db: PrefectDBInterface
):
    """
    Reads task runs states for a task run.

    Args:
        session: A database session
        task_run_id: the task run id

    Returns:
        List[db.TaskRunState]: the task run states
    """

    query = (
        select(db.TaskRunState)
        .filter_by(task_run_id=task_run_id)
        .order_by(db.TaskRunState.timestamp)
    )
    result = await session.execute(query)
    return result.scalars().unique().all()