在db.create中使用模型中的Mongoose.Schema.Types.Decimal时的ValidationError

Question

版本：
    mongoose@4.11.5     mongodb服务器版本：3.4.7

型号：

var mongoose = require('mongoose'),
Schema = mongoose.Schema;

var CheckSchema = new Schema({
    providerName: String,
    number: String,
    date:  { type: Date },
    dateReceived: { type: Date },
    amount: Schema.Types.Decimal,  
    paymentType: String,
    comment: String,
    status: String,
    images: [Image],
    transactions: [Transaction],
    rejectedTransactions: [Transaction],
    payerName: String
});

服务器代码：

Check.create(newCheck, function (err, check) {
   if (err) {
      return _response.handleError(req, res, err, _logType);
   }
   return _response.handleSuccess(req, res, 200, _logType, check);
});

返回此错误：

Check validation failed: amount: Cast to Decimal128 failed for value 
"123.98" at path "amount"
ValidationError

＆＃34;量＆＃34;来自客户端的数字。当我字符串化＆＃34;金额＆＃34;它以dbimal128类型成功地存储到数据库中。

newCheck.amount = newCheck.amount.toString();

每次创建新支票时，我都不想这样做。我有一个大型的应用程序，我想将乘法值更改为Decimal128。在我的设置中是否有我遗漏的东西？