Tutorials on Security

Learn about Security from fellow newline community members!

  • React
  • Angular
  • Vue
  • Svelte
  • NextJS
  • Redux
  • Apollo
  • Storybook
  • D3
  • Testing Library
  • JavaScript
  • TypeScript
  • Node.js
  • Deno
  • Rust
  • Python
  • GraphQL
  • React
  • Angular
  • Vue
  • Svelte
  • NextJS
  • Redux
  • Apollo
  • Storybook
  • D3
  • Testing Library
  • JavaScript
  • TypeScript
  • Node.js
  • Deno
  • Rust
  • Python
  • GraphQL

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Row Level Security in NodeJS

If you are using PostgreSQL for storing data of multiple users, you might want to apply row-level security, or RLS. It’s good practice even if you are manually writing all the queries you send to your database but it’s especially important if you have any type of LLM or similar generating queries for you! Let’s create a trivial data model. Users and items, whatever that might be. Each item belongs to a user. Now, per default, if you ask the database about any users items, it will just tell you. By introducing RLS, you can limit what the responses will be to add a layer of protection. Even if you should create a buggy query, you will not accidentally get the items belonging to someone else, just like you cannot accidentally change or delete items belonging to someone else. We do that like this: