有没有办法在simple_formView中显示多态关联？到目前为止，我得到了以下信息:=simple_form_for(@chat,:html=>{:class=>"form-horizontal"},:wrapper=>"horizontal",defaults:{:input_html=>{class:"form-control"},label_html:{class:"col-lg-4"}})do|f|=f.error_notification.form-inputs=f.association:from_user=f.association:to_user=f.input:m