问题
I have a angular 8 application and want to call a Get api call.
But I get this error:
stack: "ReferenceError: result is not defined↵ at eval (eval at push../src/app/dossier/dossier-physical/dossier-physical.component.ts.DossierPhysicalComponent.ngOnInit
This is the ts file:
export class DossierPhysicalComponent implements OnInit {
entries: Array<DossierEntry> = [];
single: DossierEntry;
showSingle: boolean;
dossiersLoaded = false;
constructor(
private healthAPIService: HealthAPIService,
private documentCorrespondencService: DocumentCorrespondenceService
) {}
ngOnInit() {
this.healthAPIService.getDossierEntry('physical').subscribe(result => {
console.log(result.values);
this.entries = result;
this.dossiersLoaded = true;
});
}
}
And this is the service:
getDossierEntry( type: String = '' ): Observable<DossierEntry[]> {
const entryType = type === '' ? 'all' : 'type/' + type;
return this.http.get<DossierEntry[]>('/api/patient/{patientUUID}/DossierEntry/' + entryType );
}
And this is the total error
HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical", ok: false, …}
error: "<!DOCTYPE html>↵<html lang="en">↵<head>↵<meta charset="utf-8">↵<title>Error</title>↵</head>↵<body>↵<pre>Cannot GET /api/patient/%7BpatientUUID%7D/DossierEntry/type/physical</pre>↵</body>↵</html>↵"
headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message: "Http failure response for http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical: 404 Not Found"
name: "HttpErrorResponse"
ok: false
status: 404
statusText: "Not Found"
url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical"
__proto__: HttpResponseBase
So what I do wrong here?
Thank you
The problem Is that I try to refactoring the Get method. Because I have a service: health.api.service.
and there are customised api calls. Like this:
get( route: string, responseType: RespType = 'json', fullResponse: boolean = false, params = null): Observable<any> {
return this.invoke( 'GET', route, null, responseType, fullResponse, true, params);
}
and the invoke method looks like this:
invoke(
method: 'GET' | 'POST' | 'PUT' | 'DELETE',
route: string,
body?: any,
responseType: RespType = 'json', // PDF gets translated to array buffer and the application/pdf accept header
fullResponse: boolean = false,
needsAuthenticatedUser = true,
params: HttpParams = null
): Observable<any> {
const user$ = this.authService.loginStatus()
.pipe( take( 1 ) );
return user$.pipe(
map( user => {
let parsedRoute = route;
if ( needsAuthenticatedUser ) {
if ( !user ) {
throw Error( 'Tried to call api that requires login without a user profile present' );
} else {
parsedRoute = parsedRoute.replace('{userId}', user.profile.sub);
parsedRoute = parsedRoute.replace('{patientUUID}', user.profile.participant);
}
}
return environment.ApiOrigin + parsedRoute;
} ),
switchMap( url => {
const accessToken = this.authService.getAccessToken();
const headers = {
'Content-Type': 'application/json',
'Accept' : HealthAPIService._responseTypes[ responseType ].mime
};
if ( !!accessToken ) {
headers[ 'Authorization' ] = `Bearer ${accessToken}`;
}
const options = {
body : body,
responseType: HealthAPIService._responseTypes[ responseType ].decode as
| 'json'
| 'text'
| 'arraybuffer',
headers : new HttpHeaders( headers )
};
if ( fullResponse ) {
options[ 'observe' ] = 'response';
}
if (params !== null) {
options['params'] = params;
}
return this.http.request( method, url, options )
.pipe( catchError(err => this.handleError(err)) );
} )
);
}
But I want to get rid of that customised Get method. And just want to call it with the HttpClient module of Angular.
This is the error handling:
private handleError( error: any ): Observable<any> {
if ( error.status && error.status === 401 ) {
console.error( 'Authorization failed, trying to login.' );
this.authService.requestLogin();
}
console.dir( error );
if ('error' in error) {
// This is necessary to allow measurement-form-component
// handleFormErrors to give correct feedback.
return observableThrowError(error);
}
return observableThrowError( error.message || error );
}
when I try thtat. I stiil get this error:
HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical", ok: false, …}
error: "<!DOCTYPE html>↵<html lang="en">↵<head>↵<meta charset="utf-8">↵<title>Error</title>↵</head>↵<body>↵<pre>Cannot GET /api/patient/%7BpatientUUID%7D/DossierEntry/type/physical</pre>↵</body>↵</html>↵"
headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message: "Http failure response for http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical: 404 Not Found"
name: "HttpErrorResponse"
ok: false
status: 404
statusText: "Not Found"
url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical"
__proto__: HttpResponseBase
constructor: ƒ HttpErrorResponse(init)
__proto__: Object
So I have it now like this:
ngOnInit() {
this.healthAPIService.getDossierEntry('physical').subscribe((result: any)=> {
console.log(result.values);
this.entries = result;
this.dossiersLoaded = true;
});
}
and this:
getDossierEntry( type: String = '' ): Observable<DossierEntry[]> {
const entryType = type === '' ? 'all' : 'type/' + type;
return this.http.get<DossierEntry[]>('/api/patient/{patientUUID}/DossierEntry/' + entryType );
}
then I will get this error:
core.js:7376 ERROR
HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical", ok: false, …}
error: "<!DOCTYPE html>↵<html lang="en">↵<head>↵<meta charset="utf-8">↵<title>Error</title>↵</head>↵<body>↵<pre>Cannot GET /api/patient/%7BpatientUUID%7D/DossierEntry/type/physical</pre>↵</body>↵</html>↵"
headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message: "Http failure response for http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical: 404 Not Found"
name: "HttpErrorResponse"
ok: false
status: 404
statusText: "Not Found"
url: "http://localhost:4200/api/patient/%7BpatientUUID%7D/DossierEntry/type/physical"
__proto__: HttpResponseBase
stack: "ReferenceError: result is not defined↵ at eval (eval at push../src/app/dossier/dossier-physical/dossier-physical.component.ts.DossierPhysicalComponent.ngOnInit (http://localhost:4200/dossier-dossier-module-ngfactory.js:18184:14), <anonymous>:1:1)↵ at DossierPhysicalComponent.push../src/app/dossier/dossier-physical/dossier-physical.component.ts.DossierPhysicalComponent.ngOnInit (http://localhost:4200/dossier-dossier-module-ngfactory.js:18184:14)↵ at checkAndUpdateDirectiveInline (http://localhost:4200/vendor.js:37850:19)↵ at checkAndUpdateNodeInline (http://localhost:4200/vendor.js:46063:20)↵ at checkAndUpdateNode (http://localhost:4200/vendor.js:46025:16)↵ at debugCheckAndUpdateNode (http://localhost:4200/vendor.js:46659:38)↵ at debugCheckDirectivesFn (http://localhost:4200/vendor.js:46619:13)↵ at Object.updateDirectives (http://localhost:4200/dossier-dossier-module-ngfactory.js:18152:711)↵ at Object.debugUpdateDirectives [as updateDirectives] (http://localhost:4200/vendor.js:46611:21)↵ at checkAndUpdateView (http://localhost:4200/vendor.js:46007:14)"
and this is the HttpMaintenanceInterceptor:
@Injectable({
providedIn: 'root'
})
export class HttpMaintenanceInterceptor implements HttpInterceptor {
constructor(private auth: AuthService ) {
}
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
request = request.clone({
setHeaders: {
Authorization: `Bearer ${this.auth.getAccessToken()}`
}
});
return next.handle(request);
}
}
I have it now like this:
getDossierEntry( patientUUID: string, type: String = '' ): Observable<DossierEntry[]> {
const entryType = type === '' ? 'all' : 'type/' + type;
console.log(this.http.get<DossierEntry[]>('/api/patient/' + patientUUID + '/DossierEntry/' + entryType));
return this.http.get<DossierEntry[]>('/api/patient/${patientUUID}/DossierEntry/' + entryType);
}
and this:
ngOnInit() {
this.documentCorrespondencService.getDossierEntry('physical').subscribe((result: any)=> {
console.log(result.values);
this.entries = result;
this.dossiersLoaded = true;
});
}
I get this output:
Observable {_isScalar: false, source: Observable, operator: MapOperator}
operator: MapOperator
project: ƒ (res)
thisArg: undefined
__proto__: Object
source: Observable {_isScalar: false, source: Observable, operator: FilterOperator}
_isScalar: false
__proto__: Object
HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/api/patient/$%7BpatientUUID%7D/DossierEntry/all", ok: false, …}
error: "<!DOCTYPE html>↵<html lang="en">↵<head>↵<meta charset="utf-8">↵<title>Error</title>↵</head>↵<body>↵<pre>Cannot GET /api/patient/$%7BpatientUUID%7D/DossierEntry/all</pre>↵</body>↵</html>↵"
headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message: "Http failure response for http://localhost:4200/api/patient/$%7BpatientUUID%7D/DossierEntry/all: 404 Not Found"
name: "HttpErrorResponse"
ok: false
status: 404
statusText: "Not Found"
url: "http://localhost:4200/api/patient/$%7BpatientUUID%7D/DossierEntry/all"
__proto__: HttpResponseBase
even if I do this:
getDossierEntry( patientUUID: string, type: String = '' ): Observable<DossierEntry[]> {
patientUUID = '0d584905-fc20-4723-870a-0f0214419507';
const entryType = type === '' ? 'all' : 'type/' + type;
console.log(this.http.get<DossierEntry[]>('/api/patient/' + patientUUID + '/DossierEntry/' + entryType ));
console.log(patientUUID);
return this.http.get<DossierEntry[]>('/api/patient/' + patientUUID + '/DossierEntry/' + entryType );
}
doenst work
回答1:
To achieve expected result, use below option of updating API url with patientUUID
Option 1:
getDossierEntry( patientUUID: string, type: String = '' ): Observable<DossierEntry[]> {
const entryType = type === '' ? 'all' : 'type/' + type;
return this.http.get<DossierEntry[]>('/api/patient/' + patientUUID + '/DossierEntry/' + entryType );
}
Option 2: Other way of using patientUUID in URL
getDossierEntry( patientUUID: string, type: String = '' ): Observable<DossierEntry[]> {
const entryType = type === '' ? 'all' : 'type/' + type;
return this.http.get<DossierEntry[]>('/api/patient/${patientUUID}/DossierEntry/' + entryType);
}
Issue : patientUUID value is not getting appended to URL at intended location and getting 404 not found as it turns out to be invalid
To fix this issue update API url as above with parameters - patientUUID and type and to debug add console before return to check the url as below
console.log(this.http.get<DossierEntry[]>('/api/patient/' + patientUUID + '/DossierEntry/' + entryType)
回答2:
As i see the response you are getting is 404, which means the URL is not found.
In your code,
you are not substituting the value of patientUUID that you can check in the URL
return this.http.get<DossierEntry[]>('/api/patient/{patientUUID}/DossierEntry/' + entryType
回答3:
in developer mode you should add proxy.conf.json to forward to your server: for example:
{
"/api": {
"target": "http://localhost:1337",
"secure": false
}
}
回答4:
Map result type to any or
ngOnInit() {
this.healthAPIService.getDossierEntry('physical').subscribe((result:DossierEntry[])=> {
console.log(result.values);
this.entries = result;
this.dossiersLoaded = true;
});
}
OR
ngOnInit() {
this.healthAPIService.getDossierEntry('physical').subscribe((result:any)=> {
console.log(result.values);
this.entries = result;
this.dossiersLoaded = true;
});
}
来源：https://stackoverflow.com/questions/58057875/api-call-in-angular-8-result-is-not-defined