Asynchronous race condition problem

[jekku]

While trying to upload through cast_attachments/3, I do this in the controller:

  def update(conn, %{"id" => id, "artist" => artist_params}) do # this contains the file params too.
    artist = Repo.get!(Artist, id)
    changeset = Artist.changeset(artist, artist_params)
    case Repo.update(changeset) do
      {:ok, artist} ->
        conn
        |> put_flash(:info, "some message")
        |> redirect(to: somewhere)
      {:error, error} ->
        render(conn, "edit.html", artist: artist, changeset: changeset)
    end
  end

It always goes back to the edit page when cast_attachments/3 is called. When I turn it off, it works correctly. If you pry it in the case results, it will render on its own and the pry would still be available.

Why does this happen?

[jekku]

Solved. It was because I was storing the images to priv and it casted a livereload every single time.