Reply POST comes empty

Question

I am making a POST request in my API by my angular project and only empty the result, and by Postman comes the correct data.

service ts. :

teste(user) {    

    return this.http.post(`api/home`, user)
  }

test.componentts.:

ok(user){           
    this.loginServ.teste(user)
      .subscribe(data => {
        let retorno = (data as any)
        console.log(retorno);
      })
  }

Return only comes empty and I can not understand the pq of this. Anyone can help?

Answer 1

I believe you’re returning a Promise, then the method should be used .then() in the request, the method .subscribe() is for Observables.

Service

function teste(user) {    

return this.http.post(`api/home`, user);

}

To Promises

ok(user){           
    this.loginServ.teste(user)
      .then(success);

    function success(response){
        console.log(response);
    }
}

For Observables

ok(user){           
    this.loginServ.teste(user)
      .subscribe(data => {
       console.log(data);
      });
  }

---

Promises vs Observables

Promises - Promises deal with sigular events when an asynchronous operation succeeds or fails.

Observable - An Observable is like a Stream and allows you to pass 0 or more events when Response is returned and also call functions or callbacks for these events.

Answer 2

in place of:

teste(user) {    

    return this.http.post(`api/home`, user)
  }

I resolved so:

teste(user) {    

    return this.http.post(`api/home`,  {user:user})
  }