猫鼬模式如何添加数组

Question

我想知道如何在 Moongoose 模式中添加一个字符串数组。

我有以下代码，但它不起作用：

var message = new Schema({
    topic: String,
    content: String,
    restriction:String,
    sender:String,
    reciever:String,
    users:[String],
    read:{type: String, default: 'no'},
    like:{ type: Number, default: 0 },
    created_at: {type: Date, default: Date.now}
});

我说的是users。你能帮忙吗？

Answer 1

将您在 cmets 和主要帖子中所说的拼凑在一起，我不禁认为您缺少猫鼬的建模步骤。

首先定义架构：

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

var MessageSchema = new Schema({
    topic: String,
    content: String,
    restriction:String,
    sender:String,
    reciever:String,
    users:[String],
    read:{type: String, default: 'no'},
    like:{ type: Number, default: 0 },
    created_at: {type: Date, default: Date.now}
});

那你得告诉猫鼬：

const Message = mongoose.model('Message', MessageSchema);

然后你可以创建一个实例来放入数据：

mongoose.connect('mongodb://localhost:27017/mydb'); // assuming that's a working mongo instance
let message = new Message();
message.users.push('Juliana');
message.save((e,u) => { console.log('New user saved!'); });

如果我错了，请发布更多关于什么不起作用的信息。

Answer 2

var message = new Schema({
      topic: String,
      content: String,
      restriction:String,
      sender:String,
      reciever:String,
      users:[{
        type: String
      }],
      read:{type: String, default: 'no'},
      like:{ type: Number, default: 0 },
      created_at: {type: Date, default: Date.now}
    });

Answer 3

试试这个

var message = new Schema({
      topic: String,
      content: String,
      restriction:String,
      sender:String,
      reciever:String,
      users:[
      {name: String}],
      read:{type: String, default: 'no'},
      like:{ type: Number, default: 0 },
      created_at: {type: Date, default: Date.now}

    });