我想把我所有的创建、更新方法从我的视图移到serializer.py，我读到了保持你的视图瘦，而序列化器胖。

class APIClerkView(generics.ListCreateAPIView):
permission_classes = [IsAuthenticated]
serializer_class = ClearanceItemSerialize

  def perform_create(self, serializer):
     serializer.save(recorded_by=self.request.user.userid)

这里我有一个简单的create，它将当前用户userid保存到recorded_by，我如何在我的ModelSerializer中实现这一点
编辑：对于我的更新方法，我使用了instance.resolve等...如果有两个返回***instance***和***super（）.create（validated_data）***，我如何才能使其正常工作

def update(self, instance, validated_data):
    instance.resolve = 'True'
    instance.resolve_date = timezone.now()
    validated_data.resolve_by = self.context["request"].user.userid 
    

    TransactionLog.objects.create(cl_itemid=ClearanceItem.objects.get(cl_itemid=instance.cl_itemid),
      trans_desc="Resolve Clearance Item",
      trans_recorded=timezone.now())
    return instance
    return super().create(validated_data)

编辑2：

def update(self, instance, validated_data):
    instance.resolve = 'True'
    instance.resolve_date = timezone.now()
    instance.resolve_by = validated_data.get(self.context["request"].user.userid, instance.resolve_by)
    instance.save()
    return instance

编辑：我用这个来让它工作

def update(self, instance, validated_data):
    instance.resolve = 'True'
    instance.resolve_date = timezone.now()
    instance.resolve_by = self.context["request"].user.userid

    TransactionLog.objects.create(cl_itemid=ClearanceItem.objects.get(cl_itemid=instance.cl_itemid),
      trans_desc="Resolve Clearance Item",
      trans_recorded=timezone.now())
    instance.save()
    return instance