working on db migration 3

db_operations/migrate_mongodb.py

@@ -28,8 +28,13 @@ def migrate_mongodb():
     print("DEBUG:", "local_bind_address", str(server.local_bind_address))
 
     client = pymongo.MongoClient('127.0.0.1', server.local_bind_port)  # server.local_bind_port is assigned local port
-    db = client[MONGO_DB]
-    pprint.pprint(db.collection_names())
+    new_db = client[MONGO_DB]
+    print("New database collection names:", new_db.list_collection_names())
+
+    from ..db_operations.db_connector import DBConnector
+    old_db = DBConnector()
+
+    print("Old database collection names:", old_db.list_collection_names())
 
     server.stop()