I am currently developing a mobile app and focusing on authentication. In order to display data to the user on my home page, I need to connect to various endpoints on an API that I have created.
Although all endpoints return the correct data when tested in Postman, I am encountering a null value in my second async call within the app.
I suspect that the issue lies in the sequencing of these calls, so I am seeking assistance on how to properly synchronize them for one to wait until the other finishes before proceeding.
public login() {
this.showLoading();
this.userService.getUserIdFromUserName(this.registerCredentials.username) // WORKS
.subscribe(
res => {
console.log(res);
localStorage.setItem("UserId", res.toString());
},
err => {
console.log(err);
});
this.userService.getEmployeeIdFromUserId(localStorage.getItem("UserId")) // THIS RETURNS NULL
.subscribe(
res => {
console.log(res);
localStorage.setItem("EmployeeId", res.toString());
},
err => {
console.log(err);
});
this.authService.login(this.registerCredentials)
.subscribe(
data => {
this.loading.dismissAll();
console.log('User logged in successfully! ', data);
this.nav.push(TabsPage);
localStorage.setItem("Username", this.registerCredentials.username);
localStorage.setItem("isLoggedIn", "true");
},
error => {
this.loading.dismissAll();
this.showAlert("Uh oh!", "Something went wrong. Please re-enter your login credentials or check your connection.");
console.log(error);
});
}