Allows the signal api to process an external id

src/dispatch/signal/service.py

@@ -1,6 +1,6 @@
 import json
 from datetime import datetime, timedelta, timezone
-from typing import Optional
+from typing import Optional, Union
 
 from pydantic.error_wrappers import ErrorWrapper, ValidationError
 from sqlalchemy import desc, asc
@@ -18,6 +18,7 @@
 from dispatch.tag import service as tag_service
 from dispatch.workflow import service as workflow_service
 from dispatch.entity.models import Entity
+from dispatch.models import PrimaryKey
 
 from .models import (
     Signal,
@@ -207,7 +208,7 @@ def get_signal_instance(
     )
 
 
-def get(*, db_session: Session, signal_id: int) -> Optional[Signal]:
+def get(*, db_session: Session, signal_id: Union[PrimaryKey, str]) -> Optional[Signal]:
     """Gets a signal by id or external_id."""
     signal = db_session.query(Signal).filter(Signal.id == signal_id).one_or_none()
     if not signal:

src/dispatch/signal/views.py

@@ -1,4 +1,5 @@
 import logging
+from typing import Union
 
 from fastapi import APIRouter, BackgroundTasks, HTTPException, Request, Response, status, Depends
 from pydantic.error_wrappers import ErrorWrapper, ValidationError
@@ -256,7 +257,7 @@ def get_signals(common: CommonParameters):
 
 
 @router.get("/{signal_id}", response_model=SignalRead)
-def get_signal(db_session: DbSession, signal_id: PrimaryKey):
+def get_signal(db_session: DbSession, signal_id: Union[str, PrimaryKey]):
     """Gets a signal by its id."""
     signal = get(db_session=db_session, signal_id=signal_id)
     if not signal: