确保子文档的属性在猫鼬中具有唯一值

Question

我有以下模式：

//Schema A
 const evaluationSchema = new Schema({
"testId": { type: Number, unique: true },
"testCaseName": { type: String },
"marks": { type: Number }
})

//Schema B
const resultSchema = new Schema({
"empId": { type: Number, index: { unique: true } },
"score": { type: Number, default: 0 },
"questionPaper": { type: String },
"evaluationReport": [evaluationSchema], //Embeddeding Schema A
"evaluatedOn": { type: Date, default: new Date() },
"updatedOn": { type: Date, default: new Date() }
})

//Schema C
const batchReportSchema = {
"fa": [{
    "faNo": { type: Number, required: [true, 'Required field'] },
    "result": [resultSchema]  //Embedding Schema B
    }]
};

const schema = mongoose.Schema(batchReportSchema , { collection: 
batchName });

您会注意到，这是带有嵌入式子文档的架构。当我插入值时，唯一属性不会应用于empId和testId属性。

我在做什么错？任何指示或建议都会有所帮助。