Question

我有以下shema，如何从Media填充文档以进行教育，经验和认证？我已经尝试了很多方法，但是没有用。

const mongoose = require('mongoose');

exports.User = schema => {
  schema.add({
    username: {
      type: String,
      index: true
    },
    education: [
      {
        title: String,
        description: String,
        year: String,
        verified: Boolean,
        documentId: mongoose.Schema.Types.ObjectId
      }
    ],
    experience: [
      {
        title: String,
        description: String,
        year: String,
        verified: Boolean,
        documentId: mongoose.Schema.Types.ObjectId
      }
    ],
    certification: [
      {
        title: String,
        description: String,
        year: String,
        verified: Boolean,
        documentId: mongoose.Schema.Types.ObjectId
      }
    ]
  });
  schema.set('toObject', { virtuals: true });
  schema.set('toJSON', { virtuals: true });
};

Answer 1

检查populate

const users = await User.find({}).populate('education').populate('experience').populate('certification')

Answer 2

您可以使用path属性进行深层链接，这也适用于Array类型。

步骤1：如下更改documentId字段的架构，以定义参考

documentId: { type: mongoose.ObjectId, ref: 'Media' },

步骤2： 在架构上定义虚拟属性

schema.virtual('educationDocument', {   
    ref: 'Media', // the collection/model name
    localField: 'education.documentId',
    foreignField: '_id',
    justOne: true, // default is false });

步骤3：使用猫鼬填充路径定义进行深层链接

const users = await User.find({})
    .populate({ path: 'educationDocument' })
    .populate({ path: 'experienceDocument' })
    .populate({ path: 'certificationDocument' })
    .execPopulate()

用猫鼬虚拟填充

2 个答案: