拒绝对Firebase实时数据库的权限

Question

我有这样设置的firebase数据库规则

"Users":{
        
         "$user_id":{

            "Name":{
                    ".read":"auth != null",
                    ".write":"auth.uid == $user_id"
                },

            "Email":{
                    ".read":"auth != null",
                    ".write":"auth.uid == $user_id"
                },

            "Address":{
                    ".read":"auth != null",
                    ".write":"auth.uid == $user_id"
                },

            "Photo":{
                    ".read":"auth != null",
                    ".write":"auth.uid == $user_id"
                },

            "Number":{
                    ".read":"auth.uid == $user_id",
                    ".write":"auth.uid == $user_id"
                }
,
            "Current":{
                    ".read":"auth != null",
                    ".write":"auth.uid == $user_id"
            }
         }

       }

FirebaseAuth mAuth = FirebaseAuth.getInstance();
DatabaseReference userRef = FirebaseDatabase.getInstance().getReference().child(FirebaseConstants.USERS).child(mAuth.getCurrentUser().getUid());

if(mAuth.getCurrentUser() !=null)
{
    Log.i("DetailsActivity","User id "+mAuth.getCurrentUser().getUid());

}
else
{
    Log.i("DetailsActivity","User not authenticated");
}
                       
userRef.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                if(dataSnapshot.hasChild(FirebaseConstants.NAME))
                {
                    Name = dataSnapshot.child(FirebaseConstants.NAME).getValue().toString();
                    UserNameEdittext.append(Name);

                }
                if(dataSnapshot.hasChild(FirebaseConstants.EMAIL))
                {
                    Email = dataSnapshot.child(FirebaseConstants.EMAIL).getValue().toString();
                    UserEmailEdittext.append(Email);
                }
                userInfoProgressbar.setVisibility(View.INVISIBLE);

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

                userInfoProgressbar.setVisibility(View.INVISIBLE);
                Log.i("DetailsActivity","error "+databaseError);

            }
            
});                    
  

I/DetailsActivity: User id KfiIFOEGWQZIc5UREqX8qo4Nmkn1
I/DetailsActivity: error DatabaseError: Permission denied

userRef.child(FirebaseConstants.NAME).addListenerForSingleValueEvent(new ValueEventListener() {
@Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                if(dataSnapshot.exists())
                {
                    Name = dataSnapshot.getValue().toString();
                    Log.i("DetailsActivity","Name "+Name);

                }

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

                userInfoProgressbar.setVisibility(View.INVISIBLE);
                Log.i("DetailsActivity","error "+databaseError);

            }        
});

I/DetailsActivity: Name elsonjose

任何帮助都很感激。提前谢了。

Answer 1

假设您的默认值设置为：

  "rules": {
    ".read": false,
    ".write": false,

您确实有单个字段的规则，但是在读取整个用户记录时可能会得到“权限被拒绝”，因为您没有为“$user_id”路径本身设置任何规则。尝试添加：

    "Users": {
          "$user_id": {
            // Allow only authenticated content owners access to their data
            ".read": "auth != null && auth.uid == $user_id",
            ".write": "auth != null && auth.uid == $user_id"
          } 
...