Adding .indexOn for nested data

Question

I am getting the firebase warning "Using an unspecified index. Consider adding ".indexOn": "E-mail" at /user/544dceb6-98d-4f7e/clients.

The rule I added is:

{
  "rules": {
    "user": {
      "$clients": {
        ".indexOn": ["E-mail"]
      }
    }
  }
}

This is the call I'm making:

firebaseRef.child(authData.uid + "/clients").orderByChild("E-mail").equalTo(this.props.params.clientId).on('value', function(clientSnapshot) { ... }

This is how my data is structured:

database
+ user
  + 544dceb6-98d-4f7e...
      + clients
          + -K96sXIXRUIOK8....
              + E-mail

I suspect the issue has something to do with the two layers of keys but can't find a solution.

Many thanks!

Answer 1

You're missing a level in your rules.json:

{
  "rules": {
    "user": {
      "$userid": {
        "clients": {
          ".indexOn": ["E-mail"]
        }
      }
    }
  }
}

Side note: it is somewhat confusing that you have user (singular) and clients (plural) in the tree. Making them consistent helps in keeping your data structure easier to understand.