本文介绍了一个使用Ruby on Rails实现的表单元素选择器示例，展示了如何通过Rails助手方法来创建下拉列表，用于从当前用户的发票地址及联系人中进行选择。
<%= select :booking_note, :fee_invoice_send_address, User.find(session[:user_id]).fee_invoice_send_addresses.collect(&:address), {}, {:class => "ext_combobox"} %>
<%= select :booking_note, :shipper_attn_name, User.find(session[:user_id]).contact_people.collect {p| [ p.name, p.id ] }, {:include_blank => true}, {:id => "booking_note_shipper_cb"} %>
<%= select :booking_note, :shipper_attn_name, User.find(session[:user_id]).contact_people.collect {p| [ p.name, p.id ] }, {:include_blank => true}, {:id => "booking_note_shipper_cb"} %>
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