firebase database read and write permission denied

Question

I am trying to read and write on firebase database from web application and i got this error the error appear when the writeUserData() function called

and this is the js code

<script src="https://www.gstatic.com/firebasejs/5.5.1/firebase.js"></script>
<script> // Initialize Firebase var config = { // copied from firebase website }; firebase.initializeApp(config); writeUserData(); function writeUserData() { firebase.database().ref('options/gK6YJVMAr82Pp8GHmjJa').set({ active_table: '2222', }); } </script>

and this is the firebase database rules

And this is the database structure

Answer 1

You are mixing-up the two database types offered by Firebase: The Real Time Database and Firestore.

You are storing your data (and writing your security rules) in Firestore but the code you are using for writing data (firebase.database().ref('options/gK6YJVMAr82Pp8GHmjJa').set()) corresponds to the Real Time Database.

You will find here the documentation to write data to Firestore: https://firebase.google.com/docs/firestore/manage-data/add-data

So in your case you should do something along theses lines:

var db = firebase.firestore();
db.collection("options").doc("gK6YJVMAr82Pp8GHmjJa").set({
            active_table: '2222',
        })
.then(function() {
    console.log("Document successfully written!");
})
.catch(function(error) {
    console.error("Error writing document: ", error);
});

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Note the use of firebase.firestore() instead of firebase.database().