How to make another key instead of replacing it in firebase

Question

I am trying to add "ProductName":"TRUE/FALSE" to my database, but when I add another (using javascript), it just removes the previous one, and adds the new one. Here is my code:

database.ref(`product-whitelist`).child(Id).set({
    [productname]: "TRUE"
});

But whenever this is run again, and "productname" has changed, it removes the previous one that was made.

If anyone knows how I can fix this, please let me know!

Answer 1

Try this,

database.ref(`product-whitelist\`+Id).child(productname).set({
    [productname]: "TRUE"
});

Answer 2

You're looking for the update() method:

database.ref(`product-whitelist`).child(Id).update({
    [productname]: "TRUE"
});

This will write the value of [productname] and leave other properties under child(Id) untouched.

---

The above code is equivalent to:

database.ref(`product-whitelist`).child(Id).child(productname).set("TRUE");

But this approach can only write one property. By using update you can set some properties, while leave others untouched.