我已经在SO上检查了这个场景的其他答案，但不幸的是，它们似乎都不适合我。
我正在使用以下依赖项：
" Mongoose "一九九七年十一月五日

• • typescript **：第四章第七节第四节

我有一个transactions集合，其中包含trxValue属性，该属性的值采用decimal。我遇到了Mongoose中引入的新Decimal128类型，并尝试通过以下方式实现相同的类型：

// ITransaction.ts interface file
import { Types } from 'mongoose';

export default interface ITransaction {
  trxNo: string;
  trxType: 'Credit' | 'Debit';
  trxDate: Date;
  trxDesc: string;
  trxValue: string;
  cutomerId: Types.ObjectId;
  accountId: Types.ObjectId;
}

// Transactions.ts model file
import { model, Schema } from 'mongoose';
import ITransaction from '../interfaces/ITransaction';

const trxSchema = new Schema<ITransaction>({
  trxNo: { type: String, required: true },
  trxType: { type: String, required: true },
  trxDate: { type: Date, default: Date.now },
  trxDesc: { type: String, required: true },
  trxValue: {
    type: Schema.Types.Decimal128,
    required: true,
    get: (v: Schema.Types.Decimal128): string => (+v.toString()).toFixed(4),
  },
  cutomerId: { type: Schema.Types.ObjectId, required: true },
  accountId: { type: Schema.Types.ObjectId, required: true },
});

const Transaction = model<ITransaction>('Transaction', trxSchema);
export default Transaction;

问题是数据类型Decimal128似乎与typescript原语数据类型不匹配。我在编译时一直收到以下警告。有人能给我一个详细的例子吗？如何在MongoDB中使用Mongoose + Typescript和小数点后**4位数的precision来存储和获取十进制值？

Type '{ type: typeof Schema.Types.Decimal128; required: true; get: (v: Schema.Types.Decimal128) => string; }' is not assignable to type 'SchemaDefinitionProperty<string> | undefined'.
  Types of property 'type' are incompatible.
    Type 'typeof Decimal128' is not assignable to type 'typeof Mixed | StringSchemaDefinition | undefined'.
      Type 'typeof Decimal128' is not assignable to type 'typeof Mixed'.
        Types of property 'schemaName' are incompatible.
          Type '"Decimal128"' is not assignable to type '"Mixed"'.ts(2322)