Lock down database tables with RLS so users see only their own data

Lovable enforces row-level security policies on your database, so each user automatically sees only the rows they own.

When to use it

You're building a notes app where each user should only see their own notes, preventing one user from viewing another user's private notes.

Why it is worth it

RLS prevents data leaks even if your app code has a bug or someone modifies the frontend, because the database itself enforces access.

Before you start

1. Have a table for notes with a user_id column
2. Have authentication set up so you know which user is making requests

Paste this into Lovable's chat when you're setting up your database tables.

I'm building a notes app with a notes table containing id, user_id, title, content, and created_at. I need RLS policies so each authenticated user can view, create, edit, and delete only their own notes. No user should see another user's notes. Add row-level security policies to the notes table so that select, insert, update, and delete operations all respect user_id. Enable RLS on the notes table and show me the final policies.

Swap the notes table with your table name and user_id with however you identify the current user in your database.

What you get

A notes table that automatically prevents each user from seeing another user's data, even if code has a bug.