Change models, new migrations, fix front and make tests work

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/eventos_web/controllers/fallback_controller.ex

@@ -0,0 +1,20 @@
+defmodule EventosWeb.FallbackController do
+  @moduledoc """
+  Translates controller action results into valid `Plug.Conn` responses.
+
+  See `Phoenix.Controller.action_fallback/1` for more details.
+  """
+  use EventosWeb, :controller
+
+  def call(conn, {:error, %Ecto.Changeset{} = changeset}) do
+    conn
+    |> put_status(:unprocessable_entity)
+    |> render(EventosWeb.ChangesetView, "error.json", changeset: changeset)
+  end
+
+  def call(conn, {:error, :not_found}) do
+    conn
+    |> put_status(:not_found)
+    |> render(EventosWeb.ErrorView, :"404")
+  end
+end