Trying to get data from storage but it returns empty array

Question

I have data stored using custom keys. I want to return all data that starts with the id KEY- so I loop over all the data and storage and push the ones that match into an array. I can see that the data is being pushed into data[] but when I call getData() in my component it returns an empty array. What am I doing wrong?

storage.ts

getData(): any {
  this.storage.ready().then(() =>
  {
    let data = [];
    this.storage.forEach((value, key, index) =>
    {
      if (value.id.startsWith("KEY-")) {
        data.push(value);
        console.log(data);
      }
    });
    return data;
  });
}

component.ts

ionViewDidLoad() {
    this.data = this.storage.geData(); 
}

I've also tried this way

ionViewDidLoad() {
    this.storage.getData().then(data => console.log(data));
 }

It might be because the return statement is in the wrong place. I would think you need to move it down a line so it's just outside the closing function bracket. — Taylor Ackley
– Taylor Ackley, Commented Mar 19, 2018 at 16:00
Unfortunately you can't immediately use promise result or return data from it. What you can do is only return a promise, then you can use it anywhere as promise. — Efe
– Efe, Commented Mar 19, 2018 at 16:00

Efe · Accepted Answer · 2018-03-19 16:07:04Z

2

So just return a promise from your function then try to resolve data with this promise.

getData(): any {
  return this.storage.ready().then(() =>
  {
    let data = [];
    this.storage.forEach((value, key, index) =>
    {
      if (value.id.startsWith("KEY-")) {
        data.push(value);
        console.log(data);
      }
    });
    return data;
  });
}

answered Mar 19, 2018 at 16:07

Efe

5,9862 gold badges24 silver badges37 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Trying to get data from storage but it returns empty array

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related