We have a nice uploads directory now, and we have a way for Phoenix to serve files out of that new directory, but we don't have a way for any of that to actually get into our application! We'll need to fix this by adding a file-handling functionality into our application. Let's start by updating our template. Open up lib/vocial_web/templates/poll/new.html.eex and add the following code just following to the options input:
<label> Poll Image: <%= file_input f, :image %></label><br />
You'll also need to return back to the form_for call at the top of that template and pass in the multipart option, set to true:
<%= form_for @poll, poll_path(@conn, :create), [multipart: true], fn f -> %>
This will give ...
