修改

src/main/java/com/template/controller/WelcomeBedController.java

@@ -764,6 +764,7 @@ public class WelcomeBedController implements WelcomeBedControllerAPI {
 
     @Override
     public CommonResult submit(String studentCard,WelcomeBed welcomeBed) {
+        welcomeBed.setStudentCard(studentCard);
 //        先判断是否已经提交
         LambdaQueryWrapper<WelcomeBed> wrapper = new LambdaQueryWrapper<>();
         wrapper.eq(WelcomeBed::getStudentCard, studentCard);
@@ -799,7 +800,10 @@ public class WelcomeBedController implements WelcomeBedControllerAPI {
                 welcomeDormitory.setFreeBedNumber(freeBedNumber);
                 welcomeDormitory.setStatus(1);
             }
-            welcomeDormitoryService.updateById(welcomeDormitory);
+            boolean updateResult = welcomeDormitoryService.updateById(welcomeDormitory);
+            if(!updateResult){
+                return CommonResult.fail("更新失败");
+            }
         }
 
         if (!updateBed) {