猫鼬填充包含引用的对象数组 [英] Mongoose populate with array of objects containing ref

问题描述

我有一个Mongoose模式，其中包含对象的数组lists，该对象数组包含对另一个集合的引用和一个嵌套的数字数组:

I have a Mongoose schema with an array lists of objects that consist of a reference to another collection and a nested array of numbers:

var Schema, exports, mongoose, schema;

mongoose = require("mongoose");

Schema = mongoose.Schema;

schema = new Schema({
  name: {
    type: String,
    required: true,
    unique: true,
    trim: true
  },
  lists: [
    {
      list: {
        type: Schema.ObjectId,
        require: true,
        ref: "List"
      },
      allocations: [
        {
          type: Number,
          required: true
        }
      ]
    }
  ],
  createdAt: {
    type: Date,
    "default": Date.now
  },
  updatedAt: {
    type: Date
  }
});

exports = module.exports = mongoose.model("Portfolio", schema);

但是，如果没有TypeError: Cannot read property 'ref' of undefined，我将无法使populate正常工作.我已经尝试过populate('list')和populate('lists list')，但是我没有正确地调用事物，或者我的模式没有正确地形成.如果我自己单独引用列表，就不会有这个问题:

However, I cannot get populate to work as expected without getting a TypeError: Cannot read property 'ref' of undefined. I've tried populate('list') and populate('lists list') but I'm either not calling things correctly or my Schema isn't formed correctly. I don't have this problem if I simply reference the lists by themselves:

lists: [
    {
        type: Schema.ObjectId,
        require: true,
        ref: "List"
    }
  ]

但是我想在每个列表旁边都有分配数组.我需要做些什么才能得到想要的行为?

but I want to have the allocations array alongside each list. What do I need to do to get the behavior I want?

推荐答案

我找到了答案:populate('lists.list')有效.感谢这个问题:猫鼬填充在一个对象内吗?

I found the answer: populate('lists.list') works. Thanks to this question: Mongoose populate within an object?

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