events updated

databases/sql_models/postgres_database.py

@@ -10,13 +10,12 @@ engine_config = {
     "pool_size": 10,
     "max_overflow": 0,
     "echo": False,
+    "isolation_level": "READ COMMITTED"
 }
 
 engine = create_engine(**engine_config)
-session_config = {"autoflush": True, "bind": engine, "echo": True}
-SessionLocal = sessionmaker(**session_config)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, echo=True)
 session = scoped_session(sessionmaker(bind=engine))
-session.expunge_all()
 
 Base = declarative_base()
 Base.session = session

databases/sql_models/response_model.py

@@ -19,8 +19,18 @@ class AlchemyResponse:
     @property
     def data(self):
         if self.first:
-            return self.__query.first()
-        return self.__query.all()
+            try:
+                return self.__query.first()
+            except Exception as e:
+                err = e
+                self.__query.session.expunge_all()
+                return None
+        try:
+            return self.__query.all()
+        except Exception as e:
+            err = e
+            self.__query.session.expunge_all()
+            return []
 
     @property
     def count(self):