fix: handoverb validate错误

apps/wpm/serializers.py

@@ -582,6 +582,7 @@ class HandoverSerializer(CustomModelSerializer):
         if wm:
             material = wm.material
             attrs['handoverb'] = [{"wm": wm, "count": attrs["count"] }]
+            handoverb = attrs['handoverb']
         elif handoverb:
             wm: WMaterial = handoverb[0]["wm"]
         else:
@@ -600,7 +601,7 @@ class HandoverSerializer(CustomModelSerializer):
         if 'send_dept' not in attrs and 'send_mgroup' not in attrs:
             raise ValidationError('送料车间和送料工段必须有一个')
         t_count = 0
-        for ind, item in enumerate(handoverb):
+        for ind, item in enumerate(attrs['handoverb']):
             wm = item["wm"]
             t_count += item["count"]
             if attrs["material"] != wm.material: