marshmallow demo

user.py

# encoding: utf-8
"""
@author: kosmosr
@contact: zmhwft@gmail.com
@time: 2018/7/17 23:53
"""

from marshmallow import Schema, fields, pre_dump


class Auth:
    def __init__(self):
        self.base = []
        self.seller = []


class BaseAuth:
    def __init__(self, bankcard, status=None):
        self.status = status
        self.bankcard = bankcard


class SellerAuth:
    def __init__(self, status, buyer_id):
        self.status = status
        self.buyer_id = buyer_id


class AuthSchema(Schema):
    status = fields.Int(default=1)
    bankcard = fields.Str()


class SellerSchema(Schema):
    status = fields.Int(default=1)
    buyer_id = fields.Int()


class BaseAuthSchema(Schema):
    base = fields.Nested(AuthSchema, many=True)
    seller = fields.Nested(SellerSchema, many=True)

    class Meta:
        fields = ('base', 'seller')

    @pre_dump
    def check_status(self, data):
        if data.base[0].status != 3:
            self.declared_fields['base'].only = ('status',)


if __name__ == '__main__':
    auth = Auth()
    auth.base.append(BaseAuth(status=3, bankcard='123'))
    auth.seller.append([])
    schema = BaseAuthSchema()
    result = schema.dump(auth)
    print(result.data)
    # 默认返回
    # check status == 4 返回详细数据