- add example add, update, delete

utils/db/db_mtr_network_nodes.py

@@ -33,3 +33,33 @@ class MtrAdditionalNodeQuery:
         async with self.db() as session:
             stmt = select(MtrAdditionalNodesModel).where(MtrAdditionalNodesModel.id == node_id)
             return (await session.execute(stmt)).scalars().first()
+
+    # ADD example from Perplexity
+    # async def insert_city(session: AsyncSession, name: str, population: int):
+    #     new_city = City(name=name, population=population)
+    #     session.add(new_city)
+    #     await session.commit()  # Commits the transaction
+    #     await session.refresh(new_city)  # Refreshes to get generated fields (like id)
+    #     return new_city
+
+    # DELETE
+    # async def delete_city_by_id(session: AsyncSession, city_id: int):
+    #     # First, fetch the city you want to delete
+    #     result = await session.execute(select(City).where(City.id == city_id))
+    #     city = result.scalar_one_or_none()
+    #     if city:
+    #         await session.delete(city)
+    #         await session.commit()
+    #         return True  # Indicate success
+    #     return False  # Not found
+
+    # UPDATE
+    # async def update_city_population(session: AsyncSession, city_id: int, new_population: int):
+    #     result = await session.execute(select(City).where(City.id == city_id))
+    #     city = result.scalar_one_or_none()
+    #     if city:
+    #         city.population = new_population
+    #         await session.commit()
+    #         await session.refresh(city)  # Optional: refresh to get updated values
+    #         return city
+    #     return None