invoice changeset

invoice.ex

defmodule Registrar.Billing.Invoice do
  import Ecto.Changeset

  def changeset(%Invoice{} = invoice, attrs \\ %{}) do
    invoice
    |> cast(attrs, [
      :amount_due,
      :due_date,
      :scheduled_send_date
      ])
    |> validate_required([
      :amount_due,
      :due_date,
      :scheduled_send_date
    ])
    |> validate_due_date_not_past()
 end


  # Custom validation here, which accepts a changeset, adds a custom error when applicable,
  # and returns the changeset
  defp validate_due_date_not_past(changeset) do
    validate_change(changeset, :due_date, fn _, due_date ->
      now = NaiveDateTime.utc_now()

      case NaiveDateTime.compare(due_date, now) do
        :lt -> [due_date: "cannot be in past"]
        _ -> []
      end
    end)
  end
end