OTC auf Einzelartikel je Produkt begrenzen

modules/erp/artikel-mapping/service.php

@@ -129,10 +129,20 @@ function sellable_item_exists(PDO $pdo, int $sellableItemId): bool
 function find_sellable_item_for_product(PDO $pdo, int $productId): ?int
 {
     $stmt = $pdo->prepare(
-        'SELECT sellable_item_id
-         FROM sellable_item_component
-         WHERE product_id = :product_id
-         ORDER BY id
+        'SELECT sic.sellable_item_id
+         FROM sellable_item_component sic
+         INNER JOIN sellable_item si ON si.id = sic.sellable_item_id
+         INNER JOIN product p ON p.id = sic.product_id
+         WHERE sic.product_id = :product_id
+           AND sic.qty_per_item = 1
+           AND si.item_code = p.sku || \'.01\'
+           AND NOT EXISTS (
+               SELECT 1
+               FROM sellable_item_component other_sic
+               WHERE other_sic.sellable_item_id = sic.sellable_item_id
+                 AND other_sic.id <> sic.id
+           )
+         ORDER BY sic.id
          LIMIT 1'
     );
     $stmt->execute([':product_id' => $productId]);