update

mec-student/src/main/java/com/ym/mec/student/controller/MusicGroupController.java

@@ -176,7 +176,7 @@ public class MusicGroupController extends BaseController {
         
         // 判断是否可以继续购买
         List<StudentPaymentOrderDetail> studentPaymentOrderDetailList = studentPaymentOrderDetailService.findUserApplyOrder(userId, musicGroupId, DealStatusEnum.SUCCESS);
-        if(studentPaymentOrderDetailList != null){
+        if(studentPaymentOrderDetailList != null && studentPaymentOrderDetailList.size() > 0){
         	List<OrderDetailTypeEnum> typeList = studentPaymentOrderDetailList.stream().map(t -> t.getType()).collect(Collectors.toList());
         	//判断是否所有类型都购买完
 			if (musicGroup.getCourseViewType() == CourseViewTypeEnum.MEMBER_FEE) {