如何设置返回类型 Observable?
How to set returning type Observable?
我有以下代码:
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post(this.checkProjectUrl, data);
}
我收到这样的错误:
Type 'Observable' is not assignable to type
'Observable'. Type 'Object' is not assignable to type
'boolean'.
如何解决这个问题?
public check(data: ProjectSettings): Observable<T> {
return this.http.post<T>(this.checkProjectUrl, data);
}
您可以通过post<T>
投射价值。在 Angular 文档中,您可以找到 "Overload #8".
https://angular.io/api/common/http/HttpClient#post
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post<boolean>(this.checkProjectUrl, data);
}
默认情况下 HttpClient
return 中的 HTTP 方法 object
作为 Observable
。您需要将类型更改为 boolean
到 return a boolean
作为 Observable
.
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post<boolean>(this.checkProjectUrl, data);
}
我有以下代码:
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post(this.checkProjectUrl, data);
}
我收到这样的错误:
Type 'Observable' is not assignable to type 'Observable'. Type 'Object' is not assignable to type 'boolean'.
如何解决这个问题?
public check(data: ProjectSettings): Observable<T> {
return this.http.post<T>(this.checkProjectUrl, data);
}
您可以通过post<T>
投射价值。在 Angular 文档中,您可以找到 "Overload #8".
https://angular.io/api/common/http/HttpClient#post
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post<boolean>(this.checkProjectUrl, data);
}
默认情况下 HttpClient
return 中的 HTTP 方法 object
作为 Observable
。您需要将类型更改为 boolean
到 return a boolean
作为 Observable
.
public check(data: ProjectSettings): Observable<boolean> {
return this.http.post<boolean>(this.checkProjectUrl, data);
}