Add default values to optional fields in SampleUpdate

backend/app/routers/puck.py

@@ -195,6 +195,8 @@ async def get_pucks_with_tell_position(db: Session = Depends(get_db)):
     """
     Retrieve all pucks with a `tell_position` set (not null),
     their associated samples, and the latest `tell_position` value (if any).
+    Only include pucks when their latest event has a `tell_position`
+     set and matches "tell_position_set".
     """
     # Step 1: Prepare a subquery to fetch the latest event timestamp for each
     # puck with a non-null tell_position
@@ -203,9 +205,6 @@ async def get_pucks_with_tell_position(db: Session = Depends(get_db)):
             PuckEventModel.puck_id,
             func.max(PuckEventModel.timestamp).label("latest_timestamp"),
         )
-        .filter(
-            PuckEventModel.tell_position.isnot(None)
-        )  # Filter non-null tell_positions
         .group_by(PuckEventModel.puck_id)  # Group by puck
         .subquery()
     )
@@ -230,13 +229,15 @@ async def get_pucks_with_tell_position(db: Session = Depends(get_db)):
 
     # Step 3: Construct the response with pucks and their latest tell_position
     results = []
+    # Debug output for verification
+    print(f"Pucks with Events and Dewars: {pucks_with_events}")
     for puck, event, dewar in pucks_with_events:
+        print(f"Puck: {puck}, Event: {event}, Dewar: {dewar}")
+        if event.tell_position is None:
+            continue
         # Fetch associated samples for this puck
         samples = db.query(SampleModel).filter(SampleModel.puck_id == puck.id).all()
-        # Print fetched data for debugging
-        print(f"Pucks with Events and Dewars: {pucks_with_events}")
-        for puck, event, dewar in pucks_with_events:
-            print(f"Puck: {puck}, Event: {event}, Dewar: {dewar}")
+
         # Construct the response model
         results.append(
             PuckWithTellPosition(