Enforce product barcodes to be unique (references #1205)

changelog/62_UNRELEASED_xxxx-xx-xx.md

@@ -1,9 +1,21 @@
-- Fixed that tracking chores with "Done by" a different user was not possible
+### Stock improvements/fixes
+- Product barcodes are now enforced to be unique across products
 - Fixed that editing stock entries was not possible
-- Fixed that shopping list prints had a grey background (thanks @Forceu)
-- Improved/fixed the form validation on the shopping list item page (thanks @Forceu)
 - Fixed that consuming with Scan Mode was not possible
 - Fixed that the current stock total value (header of the stock overview page) didn't include decimal amounts (thanks @Ape)
-- Some night mode style improvements (thanks @BlizzWave and @KTibow)
+
+### Shopping list fixes
+- Fixed that shopping list prints had a grey background (thanks @Forceu)
+- Fixed the form validation on the shopping list item page (thanks @Forceu)
+
+### Recipe improvements
 - Recipe printing improvements (thanks @Ape)
+
+### Chores fixes
+- Fixed that tracking chores with "Done by" a different user was not possible
+
+### General & other improvements
+- Some night mode style improvements (thanks @BlizzWave and @KTibow)
+
+### API fixes
 - Fixed that due soon products with `due_type` = "Expiration date" were missing in `due_products` of the `/stock/volatile` endpoint

migrations/0128.sql

@@ -0,0 +1,13 @@
+-- Duplicate product barcodes were most probably not created on purpose,
+-- so just keep the newer one for any duplicates
+DELETE FROM product_barcodes
+WHERE id IN (
+	SELECT MIN(id)
+	FROM product_barcodes
+	GROUP BY barcode
+	HAVING COUNT(*) > 1
+);
+
+CREATE UNIQUE INDEX ix_product_barcodes ON product_barcodes (
+	barcode
+);