React Native - Return all JSON data in AsyncStorage?

Question

In my React Native app's AsyncStorage, I have multiple JSON objects, each with a unique key id like so:

 '62834456':
 data: { "foo": "bar",
 "nicknames": [ "grizz", "example" ],
 ... and so on }

They have been pushed into AsyncStorage stringified. I'm trying to retrieve every object by their id, and push both the id and its' JSON data into the component's state. I have this so far:

// for every key in async storage, push to favorites in state
importData = (id) => {
  for (id in AsyncStorage) {
    return AsyncStorage.getItem(id)
      .then(req => JSON.parse(req))
      .then(json => console.log(json))
      .catch(error => console.log('error!'));
  }
}

When console.logging 'json' in the above function, the result is null. How can I properly access all JSON objects in my AsyncStorage?

FINAL EDIT

Using your code example and removing JSON.parse (so simply console.logging req) returns this:

It appears this is happening because for some reason .forEach is returning the first string in the array, the array itself, then the second string.

Answer 1

In order to get all AsyncStorage keys, you need to call AsyncStorage.getAllKeys(). In order to speed things up, you should also use AsyncStorage.multiGet() By doing that your code becomes;

importData = async () => {
  try {
    const keys = await AsyncStorage.getAllKeys();
    const result = await AsyncStorage.multiGet(keys);

    return result.map(req => JSON.parse(req)).forEach(console.log);
  } catch (error) {
    console.error(error)
  }
}