Programming Phoenix LiveView B3.0: handle_params/3 is called after mount/3 (page 94)

c4710n · 4 April 2021 07:04

The right lifecycle should be

mount/3
handle_prams/3
render/3

LKlemens · 4 April 2021 08:56

Could you paste a link to doc, that can confirm right livecyle, please?

c4710n · 4 April 2021 09:17

From the LiveView source code:

github.com

phoenixframework/phoenix_live_view/blob/6c7c3736352a8aaf23f5843e97382827fe5f9ad5/lib/phoenix_live_view/channel.ex#L878


      
            socket =
              Utils.configure_socket(
                socket,
                mount_private(parent, assign_new, connect_params, connect_info),
                action,
                flash,
                host_uri
              )
          
            socket
            |> Utils.maybe_call_live_view_mount!(view, params, Map.merge(socket_session, session))
            |> build_state(phx_socket)
            |> maybe_call_mount_handle_params(router, url, params)
            |> reply_mount(from)
          end
          
          defp load_csrf_token(endpoint, socket_session) do
            if token = socket_session["_csrf_token"] do
              state = Plug.CSRFProtection.dump_state_from_session(token)
              secret_key_base = endpoint.config(:secret_key_base)
              Plug.CSRFProtection.load_state(secret_key_base, state)

From post in ElixirForum, it mentions:

handle_params is called after mount

And from the course provided by Pragmatic Studio. It mentions this order in a section, but I can’t remember which one, sorry.

SophieDeBenedetto · 6 April 2021 00:46

Right you are! We’ll correct this in an upcoming Beta release. Thanks for pointing this out

@redrapids, I’ll update the prose but I believe you have the source file for the image on page 94. Go ahead and update then when you get a chance. Thanks!

redrapids · 6 April 2021 16:19

Thanks for the heads up! This change is made and will go out in the next release.