How do I structure security rules in Firebase?

How do I structure security rules in Firebase?

To structure security rules in Firebase, you need to define rules based on your data hierarchy and access requirements.

Can you give me an example of a basic rule?

Sure! A basic rule might look like this:

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

This allows only authenticated users to read and write data.

What if I want to restrict access to specific users?

You can specify user IDs in your rules. For example:

{
  "rules": {
    "users": {
      "userId": {
        ".read": "auth.uid === userId",
        ".write": "auth.uid === userId"
      }
    }
  }
}

This restricts access to the user with the matching userId.

How can I test my security rules?

You can use the Firebase Emulator Suite to test your security rules locally before deploying them.