I have a problem with updating certain properties of an array of objects in a real-time database in Firebase.
My object looks like the following (see picture).
Now I want to update the IsComing property of the second participant object.
At the moment I use the updateIsComming() function, but this is not very convincing, because I have to rewrite the whole object.
function updateIsComming() {
const db = getDatabase();
update(ref(db, " your_path/EventModel/" + modelkey ), {
Location: "London",
Participants: [
{ Name: "Bella2", IsComming: "true" },
{ Name: "Tom", IsComing: "true" },
],
});
Instead, I just want to reference the specific prop from that array. For example
Participant[1].IsComming = false;
Is there any way I can access a specific array of an object directly.
Arrays as a data structure are not recommended in Firebase Realtime Database. To learn why, I recommend reading Best Practices: Arrays in Firebase .
One of the reasons for this is that you need to read the array to determine the index of the item to update. The pattern is:
As you already discovered, this is not ideal. As is common on NoSQL databases, consider an alternative data structure that better suits the use-case.
In this case, an alternative data structure to consider is:
Participants: {
"Bella2": true,
"Tom": true
}
In there, we use the name of the participant as the key which means:
update(db, "your_path/EventModel/" + modelkey + "/Participants/Tom", false)
.
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