Make upload errors more descriptive

Author: m-murphy

src/sample-db-py/sample_db/app.py

@@ -454,10 +454,16 @@ def update_matrix_tube_locations(self, matrix_tube_entries):
                     temp_matrix_tube_map[barcode] = matrix_tube_entry['well_position']
 
                     comments = matrix_tube_entry.get('comments')
-                    matrix_tube = session.query(MatrixTube).filter(MatrixTube.barcode == barcode).one()  # type: MatrixTube
+                    try:
+                        matrix_tube = session.query(MatrixTube).filter(MatrixTube.barcode == barcode).one()  # type: MatrixTube
+                    except NoResultFound:
+                        raise NoResultFound('Matrix Tube with barcode {} does not exist.'.format(barcode))
                     old_plate = matrix_tube.plate
 
-                    destination_plate = session.query(MatrixPlate).filter(MatrixPlate.uid == plate_uid).one()  # type: MatrixPlate
+                    try:
+                        destination_plate = session.query(MatrixPlate).filter(MatrixPlate.uid == plate_uid).one()  # type: MatrixPlate
+                    except NoResultFound:
+                        raise NoResultFound('Matrix plate with UID {} does not exist.'.format(plate_uid))
                     matrix_tube.plate = destination_plate
                     matrix_tube.well_position = well_position
                     if comments:

src/sample-db-py/sample_db/views.py

@@ -475,8 +475,11 @@ def update_plates():
                            " ['Well', 'Barcode', 'Comments']", status_code=403)
     except IntegrityError:
         raise InvalidUsage("Tube Position Conflict. Make sure all plates with moved tubes are being updated.", status_code=403)
-    except NoResultFound:
-        raise InvalidUsage("One or more plates do not exist", status_code=403)
+    except NoResultFound as e:
+        if e.args and e.args[0]:
+            raise InvalidUsage(e.args[0], status_code=403)
+        else:
+            raise InvalidUsage("One or more items do not exist", status_code=403)
     except ValueError as e:
         raise InvalidUsage(e.args[0], status_code=403)