修改发售预告

src/main/java/com/izouma/nineth/service/CollectionService.java

@@ -655,10 +655,14 @@ public class CollectionService {
             PageWrapper<Collection> dtoPage = new PageWrapper<>(page.getContent(), page.getPageable().getPageNumber(),
                     page.getPageable().getPageSize(), page.getTotalElements());
             Page<CollectionDTO> pageNew = toDTO(dtoPage.toPage());
-            subscribeListDTOS
-                    .add(SubscribeListDTO.builder().dateTime(subscribeTime.getStart())
-                            .collectionDTOS(pageNew.getContent())
-                            .build());
+            LocalDateTime dateTime;
+            if (pageNew.getTotalElements() > 0){
+                dateTime = pageNew.getContent().get(0).getStartTime();
+                subscribeListDTOS
+                        .add(SubscribeListDTO.builder().dateTime(dateTime)
+                                .collectionDTOS(pageNew.getContent())
+                                .build());
+            }
         });
 //        resultMap.put("notSubscribedIds", );
         return subscribeListDTOS;