Why Am I Getting a \"permission_denied\" Error When Sending Data to Firebase?

Permission Denied Error When Sending Data to Firebase

You encounter the "permission_denied" error while attempting to send data to Firebase. This error arises because the Firebase database is initially accessible only to administrative users. To rectify this, you have two options:

Allow Unauthenticated Access to the Database

• Navigate to the Database tab in the Firebase Console.
• Select the Rules tab.
• Replace the existing rules with the following:

{
  "rules": {
    ".read": true,
    ".write": true
  }
}

Caution: Remember to re-secure the database before going into production to prevent abuse.

Sign in the User Before Accessing the Database

• Implement anonymous authentication to ensure the user is signed in before accessing the database:

firebase.auth().signInAnonymously().catch(function(error) {
  // Handle Errors here.
});

• Attach your listeners upon sign-in detection:

firebase.auth().onAuthStateChanged(function(user) {
  if (user) {
    // Signed in.
    var userRef = app.dataInfo.child(app.users);
    
    var useridRef = userRef.child(app.userid);
    
    useridRef.set({
      locations: "",
      theme: "",
      colorScheme: "",
      food: ""
    });
  }
});

By following these steps, you can resolve the permission denied error and send data to the Firebase database successfully.

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