我正在尝试使用 http 模块使用下面的代码从 mongodb 中的集合中检索数据,
getPosts() {
return this.http.get('http://localhost:5005/blog/getposts').map(res => {
console.log("mapped result",res);
res.json()
});
}
每次都失败并有响应
Unexpected token < in JSON at position 0
at JSON.parse (<anonymous>)
at Response.webpackJsonp.../../../http/@angular/http.es5.js.Body.json (http.es5.js:797)
at MapSubscriber.project (auth.service.ts:45)
at MapSubscriber.webpackJsonp.../../../../rxjs/operators/map.js.MapSubscriber._next (map.js:79)
at MapSubscriber.webpackJsonp.../../../../rxjs/Subscriber.js.Subscriber.next (Subscriber.js:89)
at XMLHttpRequest.onLoad (http.es5.js:1226)
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:425)
at Object.onInvokeTask (core.es5.js:3881)
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:424)
at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runTask (zone.js:192)
but when I try it with postman, I'm getting the expected result which is this,
我正在返回服务的响应并从这样的组件订阅其数据,
ngOnInit() {
this.auth.getPosts().subscribe(data => {
this.value = data.posts;
console.log("blog component",this.value)
},err => {
console.log(err);
})
}
我究竟做错了什么?任何帮助将非常感激
您需要将响应转换为map
并订阅以获得最终结果JSON
回复
更新后的代码看起来像这样 -
getPosts() {
return this.http.get('http://localhost:5005/blog/getposts')
.map(res => res.json())
.subscribe((data: any) => {
//console.log(data);
});
}
我希望这有帮助。 :)
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