only integer amounts for new orders (database trigger)

db_setup.py

@@ -33,6 +33,7 @@ def drop_triggers(cursor):
     cursor.execute("DROP TRIGGER IF EXISTS limit_requires_stop_loss_after_insert")
     cursor.execute("DROP TRIGGER IF EXISTS limit_requires_stop_loss_after_update")
     cursor.execute("DROP TRIGGER IF EXISTS minimum_order_amount_after_insert")
+    cursor.execute("DROP TRIGGER IF EXISTS integer_amount_after_insert")
 
 
 # def drop_database(cursor):
@@ -171,6 +172,12 @@ def create_triggers(cursor):
                 WHEN NEW.ordered_amount < ?
                 BEGIN SELECT RAISE(ROLLBACK, 'There is a minimum amount for new orders.'); END
                 '''.replace('?',str(MINIMUM_ORDER_AMOUNT)))
+    cursor.execute('''
+                CREATE TRIGGER IF NOT EXISTS integer_amount_after_insert
+                AFTER INSERT ON orders
+                WHEN NEW.ordered_amount <> ROUND(NEW.ordered_amount)
+                BEGIN SELECT RAISE(ROLLBACK, 'Can only set integer amounts for new orders.'); END
+                '''.replace('?',str(MINIMUM_ORDER_AMOUNT)))
 
 
 def tables(cursor):