@trigger
Use the @trigger decorator to trigger a flow deployed on Argo Workflows based on an external event.
Read more in Triggering Flows Based on External Events.
from metaflow import trigger
Specifies the event(s) that this flow depends on.
@trigger(event='foo')
or
@trigger(events=['foo', 'bar'])
Additionally, you can specify the parameter mappings to map event payload to Metaflow parameters for the flow.
@trigger(event={'name':'foo', 'parameters':{'flow_param': 'event_field'}})
or
@trigger(events=[{'name':'foo', 'parameters':{'flow_param_1': 'event_field_1'},
{'name':'bar', 'parameters':{'flow_param_2': 'event_field_2'}])
'parameters' can also be a list of strings and tuples like so:
@trigger(event={'name':'foo', 'parameters':['common_name', ('flow_param', 'event_field')]})
This is equivalent to:
@trigger(event={'name':'foo', 'parameters':{'common_name': 'common_name', 'flow_param': 'event_field'}})
Parameters
event: Union[str, Dict[str, Any]], optional, default None
Event dependency for this flow.
events: List[Union[str, Dict[str, Any]]], default []
Events dependency for this flow.
options: Dict[str, Any], default {}
Backend-specific configuration for tuning eventing behavior.