CODEWITHSUNDEEP
androidfirebasekotlinfirebase-realtime-database
AzCodeDevelopment
AzCodeDevelopment

Reputation: 41

Firebase realtime database retrive data by uid and put it to Varable kotlin android

How to retrieve data from the Realtime database? I want to get user specific data search by uid witch is also a child of the user database. I need retrieve all data for specific user ID "day","month"etc. values as variables.

Database structure

I've got data in firebase put by:

DatabaseRow class:

data class DatabaseRow (
    val id:String = "",
    val names: String= "",
    val lastname: String="",
    val day: String="",
    val month: String="",
    val year:String=""
)

firebase input:

 val firebaseInput = DatabaseRow(user,names,lastname,day,month,year)
        userRef.child("$user").setValue(firebaseInput)

to retrieve data I'm using this code:

  auth = FirebaseAuth.getInstance()
        FirebaseUser = auth.getCurrentUser()!!

        val uid = auth.getUid()!!

        val fireBase = FirebaseDatabase.getInstance()
        userRef = fireBase.getReference("users")
        val ordersRef = userRef.child("$uid").equalTo("$uid")


val valueEventListener = object : ValueEventListener {
            override fun onDataChange(dataSnapshot: DataSnapshot) {
                for (ds in dataSnapshot.children) {
                    val username = ds.child("day").getValue(String::class.java)
                    Log.d("DataBaseGetName",username)
                    [email protected] = username 
                }
            }

            override fun onCancelled(databaseError: DatabaseError) {
                Log.d("Data", databaseError.getMessage()) //Don't ignore errors!
            }
        }
   ordersRef.addValueEventListener(valueEventListener)

that are database rules:

{
  "rules": {
      ".read": true,
      ".write": true,
         "users":{
            "$uid":{
               ".write": "auth.uid === $uid",
               ".read": "auth.uid === $uid"
               },     
    "users":{
        ".indexOn": [".value","id","names","lastname","day","month","year"]
    },
   }
  }  
}

Upvotes: 1

Views: 2450

Answers (1)

Ashish
Ashish

Reputation: 6919

When you're receiving the uid, you're trying to compare it with the database uid. The uid is always different.

val ordersRef = userRef.child("$uid")
val valueEventListener = object : ValueEventListener {
    override fun onDataChange(dataSnapshot: DataSnapshot) {
        val username = dataSnapshot.child("names").getValue(String.class);
        Log.d("DataBaseGetName",username)
    }

    override fun onCancelled(databaseError: DatabaseError) {
        Log.d("Data", databaseError.getMessage()) //Don't ignore errors!
    }
}
ordersRef.addValueEventListener(valueEventListener)

Upvotes: 3

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