Multiple subscriptions on a FirebaseListObservable #574
Description
Hi all,
When querying fb with a FirebaseListObservable like so:
let items = this.angularFire.database.list('/items', query{...}).subscribe(x => console.log(x));
the output will be something like:
[Object, Object, Object, Object]
However when attaching two subscribers, each subscriber is triggered each time an item is added to the results array. for example:
let items = this.angularFire.database.list('/items', query{...});
items.subscribe(x => console.log('Subscriber 1: ', x));
items.subscribe(y => console.log('Subscriber 2: ', y));
// output:
Subscriber 1: []
Subscriber 1: [Object]
Subscriber 1: [Object, Object]
Subscriber 1: [Object, Object, Object]
Subscriber 1: [Object, Object, Object, Object]
Subscriber 2: []
Subscriber 2: [Object]
Subscriber 2: [Object, Object]
Subscriber 2: [Object, Object, Object]
Subscriber 2: [Object, Object, Object, Object]
I would expect both subscribers to be called just once with the final array result. Is this an error in my implementation, or by design?
My goal here is to search a list and do something if no items are returned from the search, ie:
let items = this.angularFire.database.list('/items', query{...});
items.subscribe(x => console.log('Subscriber 1: ', x));
items.subscribe(x => {
if(x.length == 0)
// do something
});
I would create a plunker for this but it seems the af2 version used by plunker has a problem with facebook auth (but let's leave that for another issue ;) ):