DRF lazy Serializer

Posted 2021-02-12 ywhyme

 1 class LazySerializer:
 2     def __init__(self, cls_name, **kwargs):
 3         self.cls_name = cls_name
 4         self.kwargs = kwargs
 5 
 6     class empty:
 7         pass
 8 
 9     def __call__(self, instance=None, data=empty, **kwargs) -> serializers.Serializer:
10         return type(self.cls_name, (serializers.Serializer,), self.kwargs)(instance=instance, data=data, **kwargs)
11 
12 
13 S = LazySerializer("PeopleSerializer", name=serializers.CharField(), age=serializers.IntegerField(min_value=1))
14 s = S(data={"name": "xiaoming", "age": 18})
15 s.is_valid()
16 print(s.data) # {‘name‘: ‘xiaoming‘, ‘age‘: 18}