.save 不是函数，.map 不是更新文档时的函数

Question

我有以下代码：当我尝试从邮递员那里发送时，它说：

"message": "account.save is not a function"

const account = await Account.find({ "buildings.gateways.devices.verificationCode": code })
    var accountId = account ? account.map(item => item._id) : null

const buildings = _.flatMap(account, a => a.buildings)
const gateways = _.flatMap(buildings, b => b.gateways);
const devices = _.flatMap(gateways, g => g.devices);

// finding deviceId to insert for user from that account
const device = _.filter(devices, d => d.verificationCode === code);

device.patientFirstName = req.body.firstName;
device.patientLastName = req.body.lastName;
account.save();

如果我尝试更改为 findOne()，那么它会显示

"account.map is not a function"

帐户总是 returns 值那么为什么它不能映射我不明白。

感谢您的帮助。谢谢

Answer 1

.find() returns 一个数组，这样你就可以运行 Array.map() 但你需要 .save() 每个文件分开：

const accounts = await Account.find({ "buildings.gateways.devices.verificationCode": code })
var accountId = account ? account.map(item => item._id) : null

for(let account of accounts){
    await account.save();
}

.findOne()（等待）returns 单个文档，因此您不能使用 .map():

const account = await Account.findOne({ "buildings.gateways.devices.verificationCode": code })
var accountId = account ? account._id : null

account.save();

.save 不是函数，.map 不是更新文档时的函数

.save is not a function and .map is not a function while updating document

javascript

mongoose

mongodb

mongodb-query

mongoose-schema