Fixed qu_id_stock change handling related to the products own amount properties (fixes #1975)

changelog/69_UNRELEASED_xxxx-xx-xx.md

@@ -15,6 +15,7 @@
 - Fixed that the status button counters on the stock overview page ("X products are overdue" and so on) included products which have the option `Never show on stock overview` enabled
 - Fixed that adding Userfields to existing stock entries was not possible (only editing existing Userfield values, e.g. added during purchase or inventory, was possible)
 - Fixed that it was not possible to change a products stock QU, when the needed unit conversion (old QU => new QU) was only defined globally (means on QU level) or by the products "Factor purchase to stock quantity unit"
+- Fixed that when changing a products stock QU, the products "Quick consume mount", "Energy (kcal)" and "Tare weight" wasn't updated according to the corresponding unit conversion factor
 
 ### Shopping list
 

migrations/0198.sql

@@ -0,0 +1,11 @@
+CREATE TRIGGER cascade_change_qu_id_stock2 AFTER UPDATE ON products WHEN NEW.qu_id_stock != OLD.qu_id_stock
+BEGIN
+	-- See also the trigger "cascade_change_qu_id_stock BEFORE UPDATE ON products"
+	-- This here applies the needed changes to the products table itself only AFTER the udpate
+
+	UPDATE products
+	SET quick_consume_amount = quick_consume_amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock LIMIT 1), 1.0),
+	calories = calories / IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock LIMIT 1), 1.0),
+	tare_weight = tare_weight * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock LIMIT 1), 1.0)
+	WHERE id = NEW.id;
+END;