Ndtyjky

I'm developing an Android app using Firebase Realtime Database.
My project contains 3 distinct databases:

1. Database 1: for common items;


2. Database 2: for feature A;


3. Database 3: for feature B;

In database 1, I'm able to create rules (working for this database) using its nodes to validate if specific user is able to read and write any data, for instance:

{

  "rules": 

  {

    "plants":

    {

      ".read": true, /*"auth !== null",*/

      ".write": "auth !== null && root.child('userRegistration/' + auth.uid).child('profileTypeInfo').val()=='0'"

    },

    "criteria":

    {

      ".read": "auth !== null",

      ".write": "auth !== null && root.child('userRegistration/' + auth.uid).child('profileTypeInfo').val()=='0'"

    },

    "guide":

    {

      ".read": "auth !== null",

      ".write": "auth !== null && root.child('userRegistration/' + auth.uid).child('profileTypeInfo').val()=='0'"

    },

    "userRegistration":

    {

      ".read": true,

      ".write": true

    },

      "report" : 

      {

        ".read": "auth !== null && root.child('userRegistration/' + auth.uid).child('isActiveInfo').val()==true",

        ".write": "auth !== null && root.child('userRegistration/' + auth.uid).child('isActiveInfo').val()==true",

      }

  }

}

For this Database is OK, because I'm using the root.child of the current database. The issue is related to database A and B, because I'd like to use something like this:

database1.child('userRegistration/' + auth.uid).child('profileTypeInfo').val()=='0'"

instead of using

root.child('userRegistration/' + auth.uid).child('profileTypeInfo').val()=='0'"

In other words, I need using the child data from the database 1 despite of using the root child, which not contains the child userRegistration

I do appreciate your help!