Live View - Is there a way i can know whether I come from direct link vs liveview link?

Phoenix Forum Questions / Help
1

Sorry for the noob question,
Is there a way i can know whether I come from direct link vs liveview link? Both will be pick up by handle_params so how do I differentiate it?

2

I inspected all the arguments in mount and handle_params for a live_link and redirect link and they are pretty well identical so I don’t think you could differentiate without doing something yourself. It’s a little ugly, but something like:

live_link(class: "nav-link", to: Routes.live_path(@socket, MyAppWeb.LiveThing.Index, %{from_live: true}))

and then

def handle_params(%{}=params, _uri, socket) do
  from_liveview = case params["from_live"] do
      "true" -> true
      _ -> false
    end
  {:noreply, socket}
end

Easy enough for a user to override if they want because the parameter can be put in the URL, and it looks a bit ugly on the browser address bar.

What’s the use case? Maybe there’s another approach altogether.

3

Can you elaborate on your use case for differentiating the two?

4

That is almost like what I did. I check for value in the socket instead. My use case is I’m building a website that fetch directory from github api. I don’t want to fetch the api each time from live_link since the value is already in the socket. So I only want to fetch the directory if it’s a direct link. You can view my site here for example. Awesome Site .

5

So could you just fetch the directory from github api if the value isn’t already set? That’s really what you’re wanting by the sounds of tings.

e.g. something like

def handle_params((%{}=params, _uri, socket) do
  github_directory= case socket.assigns[:github_directory] do
    nil -> get_github_drectory()
    value -> value
  end

  assign(socket, github_directory: github_directory)
 ...
6

Yeah that is what I’m already doing. I just thought that there would be another way :smiley:

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