Clean up poll validation

lib/philomena/polls/poll.ex

@@ -39,7 +39,7 @@ defmodule Philomena.Polls.Poll do
     |> validate_required([:title, :active_until, :vote_method])
     |> validate_length(:title, max: 140, count: :bytes)
     |> validate_inclusion(:vote_method, ["single", "multiple"])
-    |> cast_assoc(:options, with: &PollOption.creation_changeset/2)
+    |> cast_assoc(:options, required: true, with: &PollOption.creation_changeset/2)
     |> validate_length(:options, min: 2, max: 20)
     |> ignore_if_blank()
   end

lib/philomena_web/controllers/topic/poll/vote_controller.ex

@@ -51,6 +51,14 @@ defmodule PhilomenaWeb.Topic.Poll.VoteController do
     end
   end
 
+  def create(conn, _params) do
+    topic = conn.assigns.topic
+
+    conn
+    |> put_flash(:error, "Your vote was not recorded.")
+    |> redirect(to: Routes.forum_topic_path(conn, :show, topic.forum, topic))
+  end
+
   def delete(conn, %{"id" => poll_vote_id}) do
     topic = conn.assigns.topic
     poll_vote = PollVotes.get_poll_vote!(poll_vote_id)

lib/philomena_web/views/topic/poll_view.ex

@@ -9,7 +9,7 @@ defmodule PhilomenaWeb.Topic.PollView do
   def winning_option(poll) do
     poll
     |> ranked_options()
-    |> hd()
+    |> Enum.at(0)
   end
 
   def active?(poll) do