Issues with Angular/Firebase data-CodePudding

I'm sort of new to Angular and I'm working on a small project for an internship. I created the front-end and sending data into the database, but now I'm having issues with retrieving the data. I Googled some stuff and created an async function that's supposed to return the data, but when I do it's in a Zone Aware Promise format in the console, or when I use the .then() function, I can only console log the array of data, but cannot return it or pass it to a global variable. Here's the code from the component:

import {getDatabase, ref} from "firebase/database";
import {get} from "@angular/fire/database";

public async getVehicles() {
    const db = getDatabase();
    const snapshot = await get(ref(db, 'vehicles'));
    return snapshot.val();
  }

and when I do this:

this.getVehicles().then(data => {
  console.log(data);
});

I get the array of data as I want it in the console. How can I get the data itself inside an outside variable, so I can use it and manipulate it as a regular array? Thanks in advance.

CodePudding user response：

add a class field called list with let list : any
on anytime you want to get the data use:

this.getVehicles().then(data => {
    this.list = data;
});

Or if you are on an async function you can use this:

this.list = await this.getVehicles();

CodePudding user response：

So I managed to solve this today with the help of my friend. Here's the code for anyone facing a similar issue, hope it helps.

public async getVehicles() {
    const db = getDatabase();
    //I made a loading component appear while the data is being fetched.
    this.showLoading = true;
    const snapshot = await get(ref(db, 'vehicles'));
    //placed the promise value into a temporary object, for some reason the data is stored as an object where attributes are the list values I'm trying to get.
    let temp = snapshot.val();
    this.list = Object.keys(temp).map(index => {
      return temp[index];
    });
    //took every element of the returned object and individually placed them into the main list
    this.showLoading= false;
    return snapshot.val();
  }