无法解析功能map()。我也尝试导入rxjs / add / operator / map
getVenues() {
if (this.placeValue != null && this.placeValue != "" && this.recipeValue != null && this.recipeValue != "") {
this._http.get("https://api.foursquare.com/v2/venues/search" +
"?client_id=3PPNMTIKJJNDVYPFOBGSHHV2PR5A2P05PYHXDN2MKSKTTBSX" +
"&client_secret=0QPHT0F5RS043F4TB4KKPQSHKSAXKE5ZNOYGB5KL2MBDYAG4" +
"&v=20160215&limit=5" +
"&near=" + this.placeValue +
"&query=" + this.recipeValue)
.map(res => res.json())
.subscribe(data => {
// we've got back the raw data, now generate the core schedule data
// and save the data for later reference
this.data1 = data.results[0].key;
console.log(this.data1)},
err => console.log(err)
);
如果我使用HttpClientModule而不是HttpClient,则会出现错误
无法解析方法get()
答案 0 :(得分:1)
通常在使用pipe()
时使用httpclient
。
this.http.get(url).pipe(map(a => b), catchError(error => this.handleError(error)));
就像对httpClient.get()
的评论一样:
/** * Construct a GET request which interprets the body as JSON and returns it. * * @return an `Observable` of the body as type `T`. */
由于它返回一个Obervable
,因此您将按照pipe将功能合并到一个链中。
!==
和===
以避免产生奇怪的结果; subscribe
之后直接get
,而是将get方法放入单独的 service ;