Now select the current month if exists.

src/api/controller/accounts.py

@@ -39,13 +39,13 @@ def get_months(account_id):
     session = db.session
 
     query = session.query(
-      distinct(extract("year", Entry.operation_date)).label("year"),
-      extract("month", Entry.operation_date).label("month")
+      distinct(cast(extract("year", Entry.operation_date), db.String)).label("year"),
+      cast(extract("month", Entry.operation_date), db.String).label("month")
     ).filter(Entry.account_id == account_id).order_by("year", "month")
 
     return json.dumps([{
         "year": i.year,
-        "month": i.month
+        "month": i.month.rjust(2, '0')
     } for i in query.all()])
 
 @app.route("/api/accounts", methods=["PUT"])