I have this module used to filter Ecto results, the first function gets called 3 times, what modifications are needed to make it get called only once (details in code)?

defmodule MangoWeb.Filters.Borrowers do
  import Ecto.Query
  use Inquisitor

  # I want to run this only once when calling build_query(conn, _params) from the controller
  def build_query(query, _attrs, _values, _conn) do
    user = _conn.assigns[:current_user]
    from b in query,
      join: i in assoc(b, :institute),
      where: i.id == ^user.institute_id
  end

  # but the above gets called two additional times because of these two:
  def build_query(query, "code", code, _conn) when code != "" do
    Ecto.Query.where(query, [p], ilike(p.code, ^"%#{code}%"))
  end

  def build_query(query, "address", address, _conn) when address != "" do
    Ecto.Query.where(query, [p], ilike(p.address, ^"%#{address}%"))
  end
end

Thanks.