The error message "Property is not found on type 'Object'" suggests that the property being accessed does not

Question

The error message "Property is not found on type 'Object'" suggests that the property being accessed does not

I wrote a function called getAll

getAll<T>() {
   return this.http.get(`${environment.apiUrl}/products`);
}

Here is how I am invoking it:

this.productService.getAll()
    .pipe(first())
    .subscribe(products => {
        debugger
        let s = products;
        this.products = products.response;
    });

However, I encountered an error:

Property 'response' does not exist on type 'Object'.ts(2339)

The server response can be in the following formats:

{"status":200,"error":null,"response":[]}
{"status":200,"error":null,"response":{}}
{"status":200,"error":null,"response":"any string"}

angular typescript

Answer 1

Answer №1

The underlying issue stems from not specifying the expected returnable object type in the http.get() method call.

By default, http.get() returns plain JSON, so trying to access an internal property directly (e.g., json_data.response) can lead to a type error.

How can this problem be resolved?

To address this issue, you need to assign the return type to http.get() using <>

Functional code example

getAll: Observable<MyReturnType>() {
   return this.http.get<MyReturnType>(`${environment.apiUrl}/products`);
}    

this.productService.getAll()
    .pipe(first())
    .subscribe(products => {
        let s = products;
        this.products = s.response;
    });

For more information: https://angular.io/tutorial/toh-pt6

Answer 2

The underlying issue stems from not specifying the expected returnable object type in the http.get() method call.

By default, http.get() returns plain JSON, so trying to access an internal property directly (e.g., json_data.response) can lead to a type error.

How can this problem be resolved?

To address this issue, you need to assign the return type to http.get() using <>

Functional code example

getAll: Observable<MyReturnType>() {
   return this.http.get<MyReturnType>(`${environment.apiUrl}/products`);
}    

this.productService.getAll()
    .pipe(first())
    .subscribe(products => {
        let s = products;
        this.products = s.response;
    });

For more information: https://angular.io/tutorial/toh-pt6

Answer 3

Answer №2

Here's a possible solution to debug the issue:

this.productService.getAll()
.pipe(first())
.subscribe(products => {
    console.log(products);
    let s = products;
    this.products = products.response;
});

It seems like the problem might lie within your backend code.

If the above doesn't resolve the issue, try specifying a type for the response. You can implement something similar to this:

getAll() { return this.http.get<{status: number, error: any, response: any}>(${environment.apiUrl}/products); }

If none of these suggestions work, consider updating your backend to only send a single type (object) in response. Avoid returning arrays in HTTP requests as it can lead to vulnerabilities. Learn more here:

Answer 4

Here's a possible solution to debug the issue:

this.productService.getAll()
.pipe(first())
.subscribe(products => {
    console.log(products);
    let s = products;
    this.products = products.response;
});

It seems like the problem might lie within your backend code.

If the above doesn't resolve the issue, try specifying a type for the response. You can implement something similar to this:

getAll() { return this.http.get<{status: number, error: any, response: any}>(${environment.apiUrl}/products); }

If none of these suggestions work, consider updating your backend to only send a single type (object) in response. Avoid returning arrays in HTTP requests as it can lead to vulnerabilities. Learn more here:

Answer 5

Answer №3

Subscribing to HttpClient allows for receiving the response body directly, as shown in the example below;

this.userService.getAllUsers().subscribe(data => this.users = data);

It is unnecessary to use the first operator since all Observables from HttpClient complete after emitting their first value.

Answer 6

Subscribing to HttpClient allows for receiving the response body directly, as shown in the example below;

this.userService.getAllUsers().subscribe(data => this.users = data);

It is unnecessary to use the first operator since all Observables from HttpClient complete after emitting their first value.

The error message "Property is not found on type 'Object'" suggests that the property being accessed does not

Answer №1

Answer №2

Answer №3

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