Socket assigns in UserSocket are not copied to the Channel's socket assigns

The issue that you’re facing is pretty common for those who have just started their Elixir journey from other languages and runtimes; you’re using the old socket, not the new one that was given the assign call. Take a look at this part here: thexr/lib/thexr_web/channels/user_socket.ex at main · homanchou/thexr · GitHub

In your case expression, you’ve done all your work and when that expression evaluates, it’s either going to return :error or {:ok, socket}. However, the line I’ve highlighted effectively throws your new result away. Instead, what we want to do is just return the evaluated case expression like so:

  def connect(%{"token" => token}, socket, _connect_info) do
    case Phoenix.Token.verify(socket, "salt", token, max_age: 1_209_600) do
      {:ok, member_id} ->
        socket = assign(socket, member_id: member_id)
        {:ok, socket}

      {:error, reason} ->
        Logger.error("#{__MODULE__} connect error #{inspect(reason)}")
        :error
    end
  end

omgerg, how did i miss that. thank u!