Improved error messaging when saving submissions.

src/submissions/backend/db/models/__init__.py

@@ -6,10 +6,11 @@ import sys, logging
 from sqlalchemy import Column, INTEGER, String, JSON
 from sqlalchemy.orm import DeclarativeMeta, declarative_base, Query, Session
 from sqlalchemy.ext.declarative import declared_attr
-from sqlalchemy.exc import ArgumentError
+from sqlalchemy.exc import ArgumentError, IntegrityError as sqlalcIntegrityError
 from typing import Any, List
 from pathlib import Path
 from tools import report_result
+# from sqlite3 import IntegrityError as sqliteIntegrityError
 
 # Load testing environment
 if 'pytest' in sys.modules:
@@ -165,8 +166,21 @@ class BaseClass(Base):
             self.__database_session__.commit()
         except Exception as e:
             logger.critical(f"Problem saving object: {e}")
+            logger.error(f"Error message: {type(e)}")
+            match e:
+                case sqlalcIntegrityError():
+                    origin = e.orig.__str__().lower()
+                    logger.debug(f"Exception origin: {origin}")
+                    if "unique constraint failed:" in origin:
+                        field = origin.split(".")[1].replace("_", " ").upper()
+                        logger.debug(field)
+                        msg = f"{field} doesn't have a unique value.\nIt must be changed."
+                    else:
+                        msg = f"Got unknown integrity error: {e}"
+                case _:
+                    msg = f"Got generic error: {e}"
             self.__database_session__.rollback()
-            report.add_result(Result(msg=f"Problem saving object {e}", status="Critical"))
+            report.add_result(Result(msg=msg, status="Critical"))
             return report