我应该如何在 Marshmallow Python 中添加包含字典列表的字段？

Question

在Marshmallow为了让你可以使用列表字段：

include_in = fields.List(cls_or_instance=fields.Str(),
                         default=['sample1', 'sample2'])

这没问题，但我有一个新要求，即在一个领域有一个字典列表。示例有效负载：

[{
  "name": "Ali",
  "age": 20
},
{
  "name": "Hasan",
  "age": 32
}]

This payload is part of the bigger schema, so now the question is how should I add and validate such a field?

---

EDIT-1: I went a step further and could find out that there is a Dict field type in Marshmallow so until now I have the below code sample:

fields.List(fields.Dict(
        keys=fields.String(validate=OneOf(('name', 'age'))),
        values=fields.String(required=True)
))

Now new problem arise and I cannot set different data types for fields in the dictionary (name and age). I'd be happy if someone could shed some light on this.

Answer 1

如果列表中的项目具有相同的形状，则可以在 中使用嵌套字段fields.List，如下所示：

class PersonSchema(Schema):
    name = fields.Str()
    age = fields.Int()

class RootSchema(Schema):
    people = fields.List(fields.Nested(PersonSchema))