Elixir / Phoenix文件上传文件夹，带有相对路径

Question

我在网址提示下引用。

Elixir/Phoenix file upload folder

我有同样的问题。我想知道为什么我不能将上传的文件移动到dest文件夹。 在绝对路径的情况下，它的工作原理。 如何设置相对路径设置？

upload_controller.ex

defmodule MyAppWeb.UploadController do
  use MyAppWeb, :controller

  def create(conn, %{"user" => user_params}) do
    IO.inspect user_params
    if upload = user_params["photo"] do
      extension = Path.extname(upload.filename)

      # It worked.
      # File.cp(upload.path, "/Users/myaccount/MyApp/priv/static/media/profile#{extension}") 

      # It didn't work.
      case File.cp(upload.path, "media/profile#{extension}") do
        {:ok, _result} ->
          conn
          |> put_flash(:info, "File Uploaded successfully.")
          |> redirect(to: upload_path(conn, :index))
        {:error, _result} ->
          IO.inspect(_result)
          conn
          |> put_flash(:info, "File Uploaded failed!!.")
          |> redirect(to: upload_path(conn, :index))
      end
    end
  end

endpoint.ex

plug Plug.Static,
  at: "/", from: :fish_pot, gzip: false,
  only: ~w(css fonts images js favicon.ico robots.txt)

#Added
plug Plug.Static, at: "/uploads", from: "media/"

我想在priv/static/media上传文件。 IO.inspect返回:enoent。