Update

lib/nulla_web/controllers/api/like_json.ex

@@ -0,0 +1,23 @@
+defmodule NullaWeb.Api.LikeJSON do
+  alias Nulla.Likes.Like
+
+  @doc """
+  Renders a list of likes.
+  """
+  def index(%{likes: likes}) do
+    %{data: for(like <- likes, do: data(like))}
+  end
+
+  @doc """
+  Renders a single like.
+  """
+  def show(%{like: like}) do
+    %{data: data(like)}
+  end
+
+  defp data(%Like{} = like) do
+    %{
+      id: like.id
+    }
+  end
+end