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How to check if Firebase Query Returns more than 1 Record?

It seems firebase Query doesn't have methods for returned results count. but, I need to perform some data operation based on returned results.

var queryRef=database.child("Family").orderByChild("age").limitToFirst(2)

queryRef.addListenerForSingleValueEvent(object : ValueEventListener
{
override fun onDataChange(p0: DataSnapshot) {
if(p0.exists()){
// do something
}
}

override fun onCancelled(p0: DatabaseError) {
}

})


but, similarly, I want p0.resultsCount instead of po.exists(). Help, me If any way it is possible to figure out returned results count.

onDataChange(p0: DataSnapshot) { if (DataSnapshot.exists() && DataSnapshot.getChildrenCount() > 1) }

1 Answer
1

You can count the number of children to which a Firebase Reference is pointing using the below method.

getChildrenCount()


For you it would be p0.getChildrenCount()

p0.getChildrenCount()

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