Developing an asynchronous function to retrieve data from an external API utilizing Await/Async strategy

Question

Developing an asynchronous function to retrieve data from an external API utilizing Await/Async strategy

Currently, there is a method under development that retrieves a value from the API. What steps are needed to properly integrate Async/Await functionality into this process?

fetchAccountById(){
        let accountName;
        this.accountService.fetchData(`SELECT * FROM account WHERE accountId = ${ localStorage.getItem('accountId') } AND accountArchived = 0`).subscribe(async (res: account) => {
          accountName = await res[0]['accountLastName'];
        });
        return accountName;
      }


    console.log(fetchAccountById()); //undefined

angular typescript

Answer 1

Answer №1

One way to simplify asynchronous code when working with Promises is by using async/await, which helps reduce callback hell. However, observables require subscribing to retrieve values, making async/await incompatible. To handle promise-based requests in this scenario, consider using axios or isomorphic fetch instead of HttpClient. With these libraries, you can use await within an async function to store the response object in a variable.

Answer 2

One way to simplify asynchronous code when working with Promises is by using async/await, which helps reduce callback hell. However, observables require subscribing to retrieve values, making async/await incompatible. To handle promise-based requests in this scenario, consider using axios or isomorphic fetch instead of HttpClient. With these libraries, you can use await within an async function to store the response object in a variable.

Answer 3

Answer №2

Perhaps you're considering updating the implementation to something like this:

getAccountById() {
 return this.accountService.fetchAccount(`SELECT * FROM account WHERE accountId = ${ localStorage.getItem('accountId') } AND accountArchived = 0`);
 }
...
getAccountById().subscribe(response=>{
 console.log(response);
 })

Answer 4

Perhaps you're considering updating the implementation to something like this:

getAccountById() {
 return this.accountService.fetchAccount(`SELECT * FROM account WHERE accountId = ${ localStorage.getItem('accountId') } AND accountArchived = 0`);
 }
...
getAccountById().subscribe(response=>{
 console.log(response);
 })

Developing an asynchronous function to retrieve data from an external API utilizing Await/Async strategy

Answer №1

Answer №2

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