我在使用Eloquent时遇到了问题。这是错误信息。Undefinedproperty:Illuminate\Database\Eloquent\Collection::$refunds这是我的模型。类受益人扩展Eloquent{publicfunctionrefunds(){return$this->hasMany('Refund');}}classRefundextendsModel{protected$guarded=array();publicstatic$rules=array('request_id'=>'required','beneficiary_id'=>'requi