Question

我编写了我的Schema，但是当我运行Node.js服务器时，显示以下错误：

MySchema.createIndex不是函数

我用它来设置记录的expireAt。这是我的代码：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var config = require('../../config.js');

var tc = new Date();
var te = tc.setSeconds(tc.getSeconds + config.EXPIRE_TOKEN_TIME.ROOM_TOKEN);

var MySchema = new Schema({
    name: String,
    guide: String,
    leader: String,
    partecipants_counter : { type: Number, default: 0},
    event_counter : { type: Number, default: 0},
    createAt: { type: Date, default: tc},
    expireAt: { type: Date, default: te},
    partecipants: [],
    events : [ {
            id : Number,
            data: String,
            user: String
            } ]
});

MySchema.createIndex( { "expireAt": 1 }, { expireAfterSeconds: 180 } );

module.exports = mongoose.model(config.DATA_TYPE.ROOM, MySchema);

Answer 1

语法应为

MySchema.index( { "expireAt": 1 }, { expireAfterSeconds: 180 } );

更一般的例子： -

var animalSchema = new Schema({
  name: String,
  type: String,
  tags: { type: [String], index: true } // field level
});

animalSchema.index({ name: 1, type: -1 }); // schema level

MongoDB Schema - 调用createIndex（）来设置expireAt时出错

1 个答案: