在路径"_id"上执行更新将修改不可变字段"_id" [英] Performing an update on the path '_id' would modify the immutable field '_id'

问题描述

我正在尝试更新mongo数据库中的字段.但是，我得到了空洞错误.

I am trying to UPDATE fields in mongo database. However, I get the hollowing error.

MongoError:对路径"_id"执行更新会修改不变字段"_id"

MongoError: Performing an update on the path '_id' would modify the immutable field '_id'

我要更新的代码.

app.put("/api/inventory/:sku", (req, res, next) => {
  const inventory = new Inventory({
    _id: req.body.id,
    sku: req.body.sku,
    total_qty: req.body.total_qty,
    current_qty: req.body.current_qty
  });
  Inventory.updateOne({ sku: req.params.sku }, req.body).then(result => {
    res.status(200).json({ message: "Update successful!" });
  });
});

推荐答案

_id 是自动生成的-有关其含义的更深入说明，请参见

_id is auto-generated - for a more in-depth explanation about what it is, see this answer.

您无法创建此字段-它是在创建任何新文档时创建的.您需要使用 id 字段(不带下划线 _ ):

You can't create this field - it's created when you create any new document. You need to use the id field (no leading underscore _):

const inventory = new Inventory({
  id: req.body.id,
  sku: req.body.sku,
  total_qty: req.body.total_qty,
  current_qty: req.body.current_qty
});

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