flask
flask-pymongo
flask-mongoengine

数据内容

[{
  "_id": {
    "$oid": "62e3525f18909374eb4de53f"
  },
  "plat": {
    "wechat": "bc61736d-7ed0-47bb-ba1b-33474fecde23",
    "alipay": "random"
  },
  "created_at": {
    "$date": {
      "$numberLong": "1659093727910"
    }
  },
  "updated_at": {
    "$date": {
      "$numberLong": "1659093727910"
    }
  },
  "nickname": "su"
}]

根据 plat.wechat中来搜索用户
pymongo语法:

mongo.db.user.find_one(filter={"plat.wechat":openid})

mongoengine语法:

User.objects(plat__wechat=openid).first()