If you are using a Phoenix version before 1. SolutionĪ LiveView can't write to the session directly, so we'll instead have it trigger an Ajax request to our Phoenix app, which updates the session. mix phx.new initializes the application.Unlike localStorage, it can be read server-side and can thus be present on the very first render of a LiveView. Like localStorage, the data is stored client-side, so there's no need for a database dependency, and no need to worry about when to expire old session data. What is Phoenix LiveView LiveView is one of the most exciting features in the Phoenix web framework. LiveView is stateful, but keeps its state in a process that quits when you leave the page.Īnd since it only makes a single HTTP request initially to load the page (after that, it's all via WebSocket), we can't just set cookies or modify the Plug/Phoenix session as directly as we're used to â but as it turns out, we can do it in a roundabout way.Ä«y default, Phoenix session data is stored in a cookie that is signed but not encrypted â the user can read it but can't modify it. Phoenix LiveView provides you all of the tools you need to build interactive, real-time applications with Elixir, while keeping your brain firmly rooted on the server-side. The problem, again, is that there's no obvious way to save persistent session data in LiveView.įor example, I might implement a chat and want it to remember your username even if the page is reloaded, or you quit your browser and come back the next day. Phoenix LiveView recently released a new feature called hooks that introduces Javascript interoperability into the LiveView lifecycle. Weve already bootstrapped our Phoenix LiveView-based Messenger apps database structure and a first LiveView page. Third time's the charm â I now have a solution for storing it in the actual Plug/Phoenix session, based in large part on a solution that Martin Svalin shared. Phoenix LiveView Tutorial: Adding Phoenix PubSub and Pow Authentication to Messenger. If youve followed along in the previous tutorial youll discover how much simpler and more readable the implementation becomes when using LiveView. Single source of truth with Phoenix LiveView If you want to understand how Elixir Apps work, this is the way If you already created LiveView pages without. I wrote previously about how to save persistent session data in the DB or in localStorage with Phoenix LiveView. LiveView is a relatively new feature in Phoenix and a lot of people are very excited about it. Phoenix LiveView is an exciting new library which enables rich, real-time user experiences with server-rendered HTML.
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