frenzy/lib/frenzy_web/views/layout_view.ex

defmodule FrenzyWeb.LayoutView do
  use FrenzyWeb, :view
  alias Frenzy.{Repo, Group}
  import Ecto.Query

  def user_groups(user) do
    Repo.all(from g in Group, where: g.user_id == ^user.id, preload: [:feeds])
  end
end