I am not sure if this is possible in fire base as I wish, My database is
User_ID: ID
online:true/false
friends:
ID: Name
ID: Name
User login in, retrieve his information including friends Ids.
My question can I get All users with some IDs (User friend Ids) who have online true.
Looks like 2 queries: (Where friends ids(multiple ids) = ??? and online = true)
I have workaround solution for this but I don't like it As i have to get all Online users (friends and none friends) and keep only friend, in this case I will retrieve data which I dont want in this case.