React Native - json - [未处理的承诺拒绝：TypeError: undefined is not an object (evaluating 'key.time.date')]

Question

我正在编写一个从服务器获取数据的 React Native 应用程序。我需要接收 json 并只返回一些接收到的对象（日期晚于当前对象的对象）。问题发生在中途。
这是我的代码

import {serverURL} from '../assets/config/server'



export const getEventsByRegion = (region) => {
    let events;
    let url = `${serverURL}events/eventList`
    return fetch(url, {
        method: 'GET',
        headers: {
        "Accept": "application/json",
        'Content-Type': 'application/json'
        }
    })
    .then(response => { 
        return response.json();})
    .then(responseData => {
        events = responseData;
        })
    .catch(err => {
        console.log("fetch error" + err);
    })
    .then( () =>
        {
            if(events){
                events = Object.values(events).filter((key) => {
                    console.log(key)
                    return ((key.region[0] === region) )
                })
            } else 
            events = null;
            if(events){
                events = Object.values(events).filter((key) => {
                    console.log(key.name, key.time)
                    console.log(key.time.date)
                    return (toSimpleDate(new Date(key.time.date)) >= toSimpleDate(new Date())) 
                })
            } 
            
            if(events !== undefined) {
                return events; 
            }

        }
        
    );
}


  toSimpleDate = (date) => {
    return date.setHours(0,0,0,0);
  }

这是我的 console.log() 输出

//first output - full
//1
Object {
  "__v": 0,
  "_id": "607e06dd5195440015e95ed6",
  "description": "",
  "geoLocation": Object {
    "_id": "607e06dd5195440015e95ed7",
    "geometry": Object {
      "coordinates": Array [
        null,
        null,
      ],
      "type": "Point",
    },
    "type": "Feature",
  },
  "inBus": true,
  "name": "Test event 1",
  "region": Array [
    "Region1",
  ],
  "time": Object {
    "date": "2021-04-19T22:37:37.055Z",
    "timeFrom": "2021-04-19T22:37:37.055Z",
    "timeTo": "2021-04-20T10:37:00.000Z",
  },
}

//2
Object {
  "__v": 0,
  "_id": "60911a388446fe0015c8f7e0",
  "description": "test description",
  "geoLocation": Object {
    "_id": "60911a388446fe0015c8f7e1",
    "geometry": Object {
      "coordinates": Array [
        null,
        null,
      ],
      "type": "Point",
    },
    "type": "Feature",
  },
  "inBus": false,
  "name": "Test event 2",
  "region": Array [
    "Region1",
  ],
  "time": Object {
    "date": "2021-05-26T09:54:00.000Z",
    "timeFrom": "2021-05-04T08:00:15.410Z",
    "timeTo": "2021-05-04T12:25:15.410Z",
  },
}
//second output - a part only
//1
Test event 1 Object {
  "date": "2021-01-01T12:41:00.000Z",
  "timeFrom": "2020-12-27T11:41:48.610Z",
  "timeTo": "2020-12-27T12:41:48.610Z",
}

2021-01-01T12:41:00.000Z

//2
[Unhandled promise rejection: TypeError: undefined is not an object (evaluating 'key.time.date')]
//

如您所见，它拒绝读取 key.time.date 字段（示例中没有显示，但 key.time 和 key.name 都没有问题）。数据的来源是一样的，我找不到结构的问题。

请帮忙