v_listprices tweaks (#278)

migrations/000.375.sql

@@ -0,0 +1,57 @@
+-- Fix v_listprice issues
+
+-- Only change from previous view definition:
+-- 1) designers price premium coeffient should default to 1.0, not 1.01 (line 33)
+-- 2) round to 8 decimals instead of 2 (line 41)
+
+drop view if exists v_listprices;
+
+create view v_listprices as
+select
+    printid printproduct_id,
+    markets.id market_id,
+    round(
+		-- Base price
+		CASE
+			WHEN groupid IN (1,3) THEN -- Wallpaper
+				(select (price/100.0) from "product-materials" where material = 'standard-wallpaper')
+			WHEN groupid = 2 THEN -- Canvas
+				(select min(price_sek) from external_print_products where group_id = 2)
+			WHEN groupid IN (7,8) THEN -- Poster
+				(select min(price_sek) from external_print_products where group_id in (7,8))
+		END
+        -- Market price adjustment, and VAT, and currency exchange rate
+        * exchange_rate * price_adjustment * vat
+        -- Designer price premium, if exist
+        * (coalesce(
+			CASE
+				WHEN groupid IN (1,3) THEN pricepremium_wallpaper
+				WHEN groupid = 2 THEN pricepremium_canvas
+				WHEN groupid = 7 THEN pricepremium_poster
+				WHEN groupid = 8 THEN pricepremium_framed_print
+			END
+			, 0) / 100.0 + 1)
+		-- Local product type adjustments, if wallpaper, and if exists
+		* COALESCE(
+			CASE WHEN groupid in (1,3) THEN
+				(select value from price_adjustments where material_id = 1 and product_type = 'product' and market_id = markets.id limit 1)
+			END
+		, 1.0)
+        -- Round to eight decimals
+        , 8) listprice
+from
+    "product-printproducts"
+    join "product-products" using (productid)
+    left join designers using (designerid),
+    markets join "product-currencies" on currency = iso3char
+;
+
+COMMENT ON COLUMN v_listprices.listprice IS 'Canvas and poster listprice:
+Start with price (SEK) for cheapest canvas/poster size.
+Multiply with market price adjustment, VAT and currency exchange rate.
+Multiply with designer price premium, if exists.
+Round to two decimals.
+
+Wallpaper listprice:
+Same as poster/canvas, but start with the price for 1 m/2 standard wallpaper.
+Also include local wallpaper price adjustments (per market, product type, and material) if exists.';