Making an ajax request to update the value of a specific key in an object

I am currently working with a firebase database that contains multiple collections. Using the code provided, I have managed to successfully retrieve an array that consists of all attractions with an area_id that matches the area_id of e.target.

However, there seems to be a problem in my code where the attraction.id (which is a different key than area_id) is being changed to the object's index in the array. For example, id 1 is becoming 0, id 2 is becoming 1, and so on...

Initially, I suspected that this issue was occurring in the Object.keys method, so I added a console log right before it, only to find that the change had already taken place. Therefore, I am almost certain that the problem lies within the query. Any assistance on this matter would be greatly appreciated.

const getAttractionsByArea = (area_id) => {
  let attractions = [];
  return new Promise((resolve, reject) => {
    $.ajax(`https://theme-park.firebaseio.com/attractions.json?orderBy="area_id"&equalTo=${area_id}`)
      .then((results) => {
        Object.keys(results).forEach((result) => {
          results[result].id = result;
          attractions.push(results[result]);
        });
        resolve(attractions);
      }).catch((err) => {
        reject(err);
      });
  });
};

Answer №1

It appears that the issue lies in assigning the id of each record to the current key index while looping.

Remember that Object.keys returns an array of strings representing enumerable properties of the object, which in this case is an array. This means you will receive an array of indexes.

The problematic line is:

results[result].id = result;

By assigning the id to the index, the original id from the database is overwritten. For instance, if the database id was 54, it would now be set to 1 if it's the second result in the collection.

It's unclear why this line is included, but try commenting it out to see the difference in results.

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