Hi all,

I am following along the excellent Phoenix in Action book from @geo. In page 59, while he takes us through the life cycle of a request through Phoenix, he says:

from our list of routes, /posts/:id is the path that gets you to this function. The “:id” portion of that route specifies that whatever you put into that position will be passed as the id in the params map.

But when I look at scopes in the router.ex (or the endpoint.ex file before that), I do not see the :id portion anywhere.

defmodule BlogWeb.Router do
  # ...
  scope "/", BlogWeb do
    pipe_through :browser

    get "/", PageController, :index
    resources "/posts", PostController do
      resources "/comments", CommentController, only: [:create]
    end
  end

  scope "/api", BlogWeb.API do
    pipe_through :api

    resources "/posts", PostController, only: [:index, :show]
  end
end

Is it supposed to be implied anywhere? How about if I do not what the id but another parameter. Or am I not understanding the philosophy of it?

Thanks very much!