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mongoose子文档字段.id未定义

subdocument mongoose-schema mongoose mongodb node.js

ALPHA · 技术社区 · 7 年前

猫鼬文件

const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const config = require('../config/config');



// Result schema
const ResultsSchema = new Schema({
    subject_id: {
        type: mongoose.SchemaTypes.ObjectId,
        required: false
    },
    marks: {
        type: [String], // when needed to store absent as well
        required: false
    }
});

// Batch Schema
const BatchSchema = new Schema({
    student_base_no: {
        type: mongoose.SchemaTypes.ObjectId,
        required: false,
    },
    results: [ResultsSchema]
});

// Marks schema
const MarksSchema = new Schema({

    date: {
        type: Date,
        default: Date.now,
        required: true
    },
    year: {
        type: String,
        default: (new Date).getFullYear(),
        required: true
    },
    batch: {
        type: String,
        required: true
    },
    batch_results: [BatchSchema]

});



const Marks = module.exports = mongoose.model('marks', MarksSchema, 'marks');

使用这段代码,我尝试获取输出,

var a = Marks.batch_results.id(id)

但它一直在说 无法读取未定义的属性“id”

我试了很多,但都不好:(

1 回复 | 直到 7 年前

SanSolo 7 年前

const BatchSchema = new Schema({
    student_base_no: {
        type: mongoose.SchemaTypes.ObjectId,
        required: false,
    },
    results:{
         type: Schema.Types.ObjectId,
          ref: 'results' 
       }
})

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