I want to order my query based on the 'order_date' value. Unfortunately, it is returning them in the reverse order (oldest orders first). I am also trying to accomplish this with pagination. This is my current query.
var orders = fbdatabase.ref('orders').orderByChild('order_date');
orders.on('value', function(snapshot) {
console.log(snapshot.val())
});
There is no way to query in reverse order with Firebase. You'll need to use limitToLast:
var orders = fbdatabase.ref('orders')
.orderByChild('order_date')
.limitToLast(20);
orders.on('value', function(snapshot) {
console.log(snapshot.val().reverse());
});
Alternatively, you could store an additional field like order_date_desc that uses a negative value (assuming timestamp).
In addition to Michael's answer, you're also not retaining the order in your callback. It's important to loop over the snapshot using snapshot.forEach() before calling .val():
var orders = fbdatabase.ref('orders').orderByChild('inverted_order_date');
orders.on('value', function(snapshot) {
snapshot.forEach(function(order) {
console.log(order.val())
});
});
See
