＆＃39;未处理的拒绝＆＃34;在feathers.js

Question

我写了这段代码：

const reports = this.app.service('generate-reports');

var job = new CronJob({
  cronTime: '* * * * * *',
  onTick: await reports => {

    var current_date = moment().hours(0).minutes(0).seconds(0).milliseconds(0).toISOString();
    var data = {
      date: current_date,
    };
    await reports.patch(null, data);
  },
  start: false,
  timeZone: 'Europe/Warsaw'
});
job.start();

但是当我尝试运行它时，我收到了这个错误：

info: Feathers application started on http://localhost:3030
error: Unhandled Rejection at: Promise  Promise {
<rejected> TypeError: Cannot read property 'patch' of undefined

问题是什么？在此先感谢您的任何帮助;）