Saving a collection of unique identifiers in Firebase

Struggling to find a solution for organizing Firebase data: Each user has posts with generated IDs, but how do I store these IDs in a user node efficiently?

Currently using string concatenation and treating them like a CSV file in my JS app, but that feels like a messy workaround.

What would be the best practice for handling this type of data structure?

Edit:

UserID:

  • Username = "User Name"
  • Posts = "id1, id2, id3, id4"

For adding a new post, I use a transaction to append the ID to the end of the string. When deleting an ID, I again utilize a transaction to remove it by running the following code:

removeElem(list, value) {
var separator = ",";
var values = list.split(separator);
for (var i = 0; i < values.length; i++) {
    if (values[i] == value) {
        values.splice(i, 1);
        return values.join(separator);
    }
}
return list;
},

Answer №1

Using transactions may be a solution, but it can negatively impact scalability and fail when the user is offline temporarily. To improve this issue, consider eliminating array logic and utilizing Firebase's push() method. According to the Firebase documentation on managing lists of data:

Push vs Transaction

When dealing with lists of data, using push() ensures a unique and chronological ID. Although you might think about using transactions to create your own IDs, push is the more efficient choice. Transactions are slower and more complicated, as they involve multiple server round trips. On the other hand, a push-generated ID works smoothly even offline and is optimized for performance.

Despite needing to adjust to non-sequential keys initially, it will lead to better outcomes in the long term.

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