问地平线/RethinkDB/Ionic2无法读取未定义的属性"push“

EN

import {Component} from '@angular/core';
import {NavController} from 'ionic-angular';

declare var Horizon;


@Component({
  templateUrl: 'build/pages/home/home.html'
})
export class HomePage {
    test: any[];

  constructor(public navCtrl: NavController) {




  }

  getMessages(){
    let test = [];
    let hz = new Horizon({host: 'localhost:3100'});
    hz.connect();
    let messages = hz('messages');
    messages.watch().subscribe(messages => {
        for(let i = 0; i<messages.length; i++){
                console.log(messages[i].text);
                console.log(messages[i].id);
            this.test.push([{
                text: messages[i].text,
                id: messages[i].id
            }])
        }
    });
  }

}