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prefect.server.models.flows

Functions for interacting with flow ORM objects. Intended for internal use by the Prefect REST API.

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Functions

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create_flow 

create_flow(db: PrefectDBInterface, session: AsyncSession, flow: schemas.core.Flow) -> orm_models.Flow
Creates a new flow. If a flow with the same name already exists, the existing flow is returned. Args:
  • session: a database session
  • flow: a flow model
Returns:
  • orm_models.Flow: the newly-created or existing flow

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update_flow 

update_flow(db: PrefectDBInterface, session: AsyncSession, flow_id: UUID, flow: schemas.actions.FlowUpdate) -> bool
Updates a flow. Args:
  • session: a database session
  • flow_id: the flow id to update
  • flow: a flow update model
Returns:
  • whether or not matching rows were found to update

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read_flow 

read_flow(db: PrefectDBInterface, session: AsyncSession, flow_id: UUID) -> Optional[orm_models.Flow]
Reads a flow by id. Args:
  • session: A database session
  • flow_id: a flow id
Returns:
  • orm_models.Flow: the flow

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read_flow_by_name 

read_flow_by_name(db: PrefectDBInterface, session: AsyncSession, name: str) -> Optional[orm_models.Flow]
Reads a flow by name. Args:
  • session: A database session
  • name: a flow name
Returns:
  • orm_models.Flow: the flow

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read_flows 

read_flows(db: PrefectDBInterface, session: AsyncSession, flow_filter: Union[schemas.filters.FlowFilter, None] = None, flow_run_filter: Union[schemas.filters.FlowRunFilter, None] = None, task_run_filter: Union[schemas.filters.TaskRunFilter, None] = None, deployment_filter: Union[schemas.filters.DeploymentFilter, None] = None, work_pool_filter: Union[schemas.filters.WorkPoolFilter, None] = None, sort: schemas.sorting.FlowSort = schemas.sorting.FlowSort.NAME_ASC, offset: Union[int, None] = None, limit: Union[int, None] = None) -> Sequence[orm_models.Flow]
Read multiple flows. Args:
  • session: A database session
  • flow_filter: only select flows that match these filters
  • flow_run_filter: only select flows whose flow runs match these filters
  • task_run_filter: only select flows whose task runs match these filters
  • deployment_filter: only select flows whose deployments match these filters
  • work_pool_filter: only select flows whose work pools match these filters
  • offset: Query offset
  • limit: Query limit
Returns:
  • List[orm_models.Flow]: flows

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count_flows 

count_flows(db: PrefectDBInterface, session: AsyncSession, flow_filter: Union[schemas.filters.FlowFilter, None] = None, flow_run_filter: Union[schemas.filters.FlowRunFilter, None] = None, task_run_filter: Union[schemas.filters.TaskRunFilter, None] = None, deployment_filter: Union[schemas.filters.DeploymentFilter, None] = None, work_pool_filter: Union[schemas.filters.WorkPoolFilter, None] = None) -> int
Count flows. Args:
  • session: A database session
  • flow_filter: only count flows that match these filters
  • flow_run_filter: only count flows whose flow runs match these filters
  • task_run_filter: only count flows whose task runs match these filters
  • deployment_filter: only count flows whose deployments match these filters
  • work_pool_filter: only count flows whose work pools match these filters
Returns:
  • count of flows

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delete_flow 

delete_flow(db: PrefectDBInterface, session: AsyncSession, flow_id: UUID) -> bool
Delete a flow by id. Args:
  • session: A database session
  • flow_id: a flow id
Returns:
  • whether or not the flow was deleted

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read_flow_labels 

read_flow_labels(db: PrefectDBInterface, session: AsyncSession, flow_id: UUID) -> Union[schemas.core.KeyValueLabels, None]
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