Post

Kyle
@boe.codes

If you're learning #ElixirLang and/or #PhoenixFramework and have any questions or need help, hit me up please 🤝

1 repost11 likes

Herr Siering
@herrsiering.de

I have a question 😅 I built a silly quiz app for my daughter. When you open the quiz page, there‘s an error flash message and I don‘t understand why. Here‘s the code: github.com/HerrBertling... - can you by chance spot something? This all looks at least okay to me 🤷🏼‍♂️🫠

github.comai-quiz/lib/menas_quiz_web/live/question_live/index.ex at main · HerrBertling/ai-quizAn AI Quiz app. Contribute to HerrBertling/ai-quiz development by creating an account on GitHub.
Kyle
@boe.codes

I’m not in front of my computer at the moment, but based on your description my guess is it has to do with the LiveView lifecycle. `mount/3` is called twice in that lifecycle, first when the initial static page is rendered, and again when the websocket connection is established to the page. (1/4)

Kyle
@boe.codes

Assigning and reassigning attributes how you’re currently is not very idiomatic. You’ll want to either: 1) check the socket connection status in `mount/3` and branch the assignment logic depending on if the liveview is connected or disconnected (2/4)

Kyle
@boe.codes

2) handle some assignment in the `handle_params/3` callback if it needs to run once and has branching logic depending on the url params present (3/4)