moai-lang-elixir

Create a changeset in mount and assign it with to_form, then implement a validate event handler that rebuilds the changeset with the :validate action and a save handler that calls the context create function. On success use put_flash and push_patch; on error reassign the form with the error changeset.

Build an Ecto.Multi by piping Ecto.Multi.new() through Multi.run, Multi.update, and Multi.insert operations with named keys, then pass it to Repo.transaction(). Each step can access results from previous steps, and the whole operation rolls back if any step fails.

A GenServer encapsulates stateful process logic with handle_call, handle_cast, and handle_info callbacks, while a DynamicSupervisor starts and stops child processes on demand at runtime. Use DynamicSupervisor when children are created dynamically, such as per-user worker processes.

Yes, Phoenix 1.7 uses the ~p sigil for verified routes, which are checked at compile time against your router definitions. For example, ~p"/users/#{user}" generates the path and raises a compile error if the route does not exist.

Check the websocket connection in the browser developer console, verify the endpoint configuration includes the websocket transport, and ensure Phoenix.LiveView is listed in mix.exs dependencies. Also confirm the live_view signing salt is configured in the endpoint.

Use mix release with MIX_ENV=prod to build a self-contained release, configure secrets and database URLs in config/runtime.exs, and package it with a multi-stage Dockerfile based on an Elixir build image and a slim runtime image.