diff --git a/apps/wpmw/views.py b/apps/wpmw/views.py
index 6fa15c46..d382df97 100644
--- a/apps/wpmw/views.py
+++ b/apps/wpmw/views.py
@@ -93,12 +93,13 @@ class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, Cu
         sr = WproutListSerializer(data=request.data)
         sr.is_valid(raise_exception=True)
         vdata = sr.validated_data
-        number_outs = [i["number_out"] for i in vdata]
+        items = vdata["items"]
+        number_outs = [i["number_out"] for i in items]
         existing_numbers = Wpr.objects.filter(number_out__in=number_outs).values_list('number_out', flat=True)
         if existing_numbers.exists():
             used_numbers = list(existing_numbers)
             raise ParseError(f"以下对外编号已被使用: {used_numbers[0]} 共{len(used_numbers)}个")
-        for i in vdata:
+        for i in items:
             wpr = Wpr.objects.get(id=i["id"])
             if wpr.number_out:
                 raise ParseError(f"编号为{wpr.number}的产品已经分配了对外编号")