fix: puorderitem create bug

apps/pum/serializers.py

@@ -6,6 +6,7 @@ from rest_framework.exceptions import ValidationError
 from apps.pum.models import Supplier, PuPlan, PuPlanItem, PuOrder, PuOrderItem
 from apps.mtm.serializers import MaterialSerializer
 
+
 class SupplierSerializer(CustomModelSerializer):
     class Meta:
         model = Supplier
@@ -27,7 +28,9 @@ class PuPlanSerializer(CustomModelSerializer):
 
 class PuPlanItemSerializer(CustomModelSerializer):
     material_ = MaterialSerializer(source='material', read_only=True)
-    belong_dept_name = serializers.CharField(source='belong_dept.name', read_only=True)
+    belong_dept_name = serializers.CharField(
+        source='belong_dept.name', read_only=True)
+
     class Meta:
         model = PuPlanItem
         fields = '__all__'
@@ -72,6 +75,7 @@ class PuOrderSerializer(CustomModelSerializer):
 
 class PuOrderItemSerializer(CustomModelSerializer):
     material_ = MaterialSerializer(source='material', read_only=True)
+
     class Meta:
         model = PuOrderItem
         fields = '__all__'
@@ -82,7 +86,7 @@ class PuOrderItemSerializer(CustomModelSerializer):
         material = validated_data['material']
         if pu_order.state != PuOrder.PUORDER_CREATE:
             raise ValidationError('采购订单该状态下不可添加明细')
-        if PuOrder.objects.filter(pu_order=pu_order, material=material).exists():
+        if PuOrderItem.objects.filter(pu_order=pu_order, material=material).exists():
             raise ValidationError('该物料已添加')
         return super().create(validated_data)
 
@@ -96,5 +100,7 @@ class PuOrderItemSerializer(CustomModelSerializer):
 
 
 class AddSerializer(serializers.Serializer):
-    pu_order = serializers.PrimaryKeyRelatedField(label='采购订单ID', queryset=PuOrder.objects.all())
-    pu_planitems = serializers.PrimaryKeyRelatedField(label='计划明细ID', queryset=PuPlanItem.objects.all(), many=True)
+    pu_order = serializers.PrimaryKeyRelatedField(
+        label='采购订单ID', queryset=PuOrder.objects.all())
+    pu_planitems = serializers.PrimaryKeyRelatedField(
+        label='计划明细ID', queryset=PuPlanItem.objects.all(), many=True)