Android firebase apply multiple queries

Question

I have following database

-KYTfJZQbg0RVzHeecIS
     createdAt: 1481204648530
     message: \"rgd\"
     read: false
     reciever: \"583d15cf45f3330807364c55         


        

Answer 1

Multiple orderbychild() queries is not supported by firebase .

Now I want to filter the result for "READ"==FALSE AND "SENDER"==58490e9945f33364ac6cd7b1

Make a new key in your data i.e. READ_SENDER and combine data for both and use query like this -

-KYTfJZQbg0RVzHeecIS
     createdAt: 1481204648530
     message: "rgd"
     read: false
     reciever: "583d15cf45f3330807364c55"
     sender: "58490e9945f33364ac6cd7b1"
     read_sender : "false_58490e9945f33364ac6cd7b1"
     updateAt: 1481204648654


Query query = reference.orderByChild("read_sender").equalTo("false_"+datum.getEmployer().getEmployerId());

Answer 2

Unfortunately this isn't straightforward using Firebase.....there's good example of doing something very similar in following video by Firebase guys (about 9 mins in) https://www.youtube.com/watch?v=sKFLI5FOOHs&list=PLl-K7zZEsYLlP-k-RKFa7RyNPa9_wCH2s&index=4