Turn Live Query Results Into Streams

Client SDKs Flutter SDK
1

Is there a way I can turn Live query results into streams in flutter? I need to create a method that returns a Stream of Posts…

Stream<List<Post>> fetchPosts () async* {
   final QueryBuilder<ParseObject> query = QueryBuilder<ParseObject>(ParseObject('Post'));
   final Subscription<ParseObject> subscription = await _liveQuery.client.subscribe(query);

      subscription.on(LiveQueryEvent.create, (value)  { 
         // return Stream<List<Post>> here..
  });
}
2

Take a look in the last example in this link: Creating streams in Dart | Dart

It shows an example using a StreamController. I think that something like this should work.

3

Thanks very much. l did managed to return a Stream of Posts. But is there an elegant way of combining Live Query Event types such as create, update, delete, enter and exit into one? A method l could perhaps call and get a list of Parse objects that increment when a new object matching the query is added or decrement when an object is removed??

4

I am not sure if there’s a specific function in the flutter sdk to do that but it could be a great addition.

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