[英]cannot display JSON data from the backend in angular 2
正在从后端(api)获取数据,但我无法将其显示到视图中。 我尝试了几种解决方案,但似乎没有用。
<ul>
<li *ngFor="let item of data">
<h4>{{item.address}}</h4>
<h4>{{item.city}}</h4>
</li>
</ul>
数据粘贴在下面。 我使用 JSON.stringify() 将数据从对象转换为字符串并将其存储在变量 getEventData 中。 当我对这样的结果进行插值时{{getEventData}}
它没问题但无法格式化它。 提前致谢。
//get request to api
this._http.get( this.url + param, {headers:headers})
.map((res:Response) => res.json())
.subscribe(
data => this.getEventData = JSON.stringify(data),
error =>this.logError(error),
() => console.log('get request completed sucesfully')
);
来自api的数据
{
"data": [
{
"address": "Great 22",
"banner_image": null,
"city": "Kum",
"country": "",
"creator_id": 15,
"description": "50th congregation",
"end_time": "2016-07-05T15:30:00+00:00",
"event_id": 5,
"is_online": false,
"max_tickets_per_user": 1,
"show_id": 7,
"start_time": "2016-07-05T09:00:00+00:00",
"state": "Ash",
"title": "Graduation",
"venue": "Great Hall"
},
{
"address": "CCB Auditorium",
"banner_image": null,
"city": "Kumasi",
"country": "hema",
"creator_id": 15,
"description": "school graduation",
"end_time": "2016-07-06T15:30:00+00:00",
"event_id": 5,
"is_online": false,
"max_tickets_per_user": 1,
"show_id": 8,
"start_time": "2016-07-06T09:00:00+00:00",
"state": "hama",
"title": "Graduation",
"venue": "CCB Auditorium"
},
{
"address": "Engineering Auditorium",
"banner_image": null,
"city": "Kumasi",
"country": "Ghana",
"creator_id": 15,
"description": "KNUST graduation for the 50th congregation",
"end_time": "2016-07-06T15:30:00+00:00",
"event_id": 5,
"is_online": false,
"max_tickets_per_user": 1,
"show_id": 9,
"start_time": "2016-07-06T09:00:00+00:00",
"state": "Ash",
"title": "Graduation",
"venue": "Engineering Auditorium"
}
]
}
你不需要JSON.stringify
如果您打算渲染数据*ngFor
:
.subscribe(
data => this.getEventData = data.data, // note extra .data
error => this.logError(error),
() => console.log('get request completed succesfully')
);
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