Show amount of opened products on stock overview page and in product card

migrations/0046.sql

@@ -15,3 +15,14 @@ ADD default_best_before_days_after_open INTEGER NOT NULL DEFAULT 0;
 
 UPDATE products
 SET default_best_before_days_after_open = 0;
+
+DROP VIEW stock_current;
+CREATE VIEW stock_current
+AS
+SELECT
+	s.product_id,
+	SUM(s.amount) AS amount,
+	MIN(s.best_before_date) AS best_before_date,
+	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id = s.product_id AND open = 1), 0) AS amount_opened
+FROM stock s
+GROUP BY s.product_id;