Format date for db

app.py

@@ -72,10 +72,10 @@ def toggle_pin(change_pin):
     if GPIO.input(change_pin) == 0:
         message += " off."
         if pins[change_pin]['on_time'] is not None:
-            start_time = str(pins[change_pin]['on_time'])
+            start_time = pins[change_pin]['on_time']
             elapsed = str(datetime.now() - start_time)
-            date = datetime.strptime(start_time, '%Y-%m-%d').date()
-            entry = DailyUsage(date=date, on_time=elapsed)
+            start_date = datetime.strptime(str(start_time), '%Y-%m-%d').date()
+            entry = DailyUsage(date=start_date, on_time=elapsed)
             db.session.add(entry)
             db.session.commit()