module DeliveriesHelper def link_to_invoice(delivery) if delivery.invoice link_to number_to_currency(delivery.invoice.amount), [:finance, delivery.invoice], :title => "Rechnung anzeigen" else link_to "Rechnung anlegen", new_finance_invoice_path(:supplier_id => delivery.supplier.id, :delivery_id => delivery.id) end end def stock_articles_for_select(supplier) supplier.stock_articles.map {|a| ["#{a.name} (#{number_to_currency a.price}/#{a.unit})", a.id] } end end