node.js - 删除方法在 MongoDB 中不起作用。每当我删除凭证时，我都会收到 CastError

Question

错误消息:"message": "Cast to ObjectId failed for value\"{ [Function: ObjectID]\n

我尝试将 id 变量类型转换为 ObjectId。

凭证 Controller :

    module.exports.deleteVoucher = function(req, res, next) {

    var lectionId = req.params._id;
    var lectionId = require('mongodb').ObjectID;
    if (!lectionId || lectionId === "") {
    return res.json({ "success": false, "msg": "You need to send the ID of 
    the Offer", "error": err });
    }

    Voucher.findByIdAndRemove(lectionId, function (err, removed) {
    if (err) {
      return res.json({ "success": false, "msg": "Error while deleting 
    Offer", "error": err });
    }

    res.status(200).json({ "success": true, "msg": "Offer deleted" });
    });

    };

如何解决这个 objectId 问题？

这是我使用的模型:

这是index.js中的路由:

router.delete('/voucher/delete/:_id', voucherCtrl.deleteVoucher);

当我向 ObjectId 添加类型转换时，出现错误 500，内部服务器错误。

Answer 1

将字符串转换为 Mongoose 对象 ID

module.exports.deleteVoucher = function(req, res, next) {

var lectionId = req.params._id;


if (!lectionId || lectionId === "") {
   return res.json({ "success": false, "msg": "You need to send the ID of the Offer", "error": err });
}

let lectionObjectId = mongoose.mongo.ObjectId(lectionId);
// or  lectionObjectId= mongoose.Types.ObjectId(lectionId)    

Voucher.remove({"_id":lectionObjectId}, function (err, removed) {
   if (err){
    return res.json({ "success": false, "msg": "Error while deleting Offer", "error": err });
   }

   res.status(200).json({ "success": true, "msg": "Offer deleted" });
});

};