fix(lastleg): export all pages when pagination caps batch size

lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegOrderService.java

@@ -91,7 +91,7 @@ public class LastlegOrderService {
 
     public PageResult<LastlegOrderSummary> page(String customerId, LastlegOrderRequests.Query query, String relabelNo) {
         Page<LastlegOrder> page = orderMapper.selectPage(
-            new Page<>(query.page(), query.size()), filter(customerId, query, relabelNo).orderByDesc(LastlegOrder::getCreatedAt));
+            new Page<>(query.page(), query.size()), filter(customerId, query, relabelNo).orderByDesc(LastlegOrder::getCreatedAt).orderByDesc(LastlegOrder::getId));
         Map<Long, List<LastlegOrderMapper.PalletMergeRelationRow>> mergeRelations = palletMergeRelations(page.getRecords());
         Map<String, String> containerNodes = containerNodes(page.getRecords());
         Map<Long, String> dispatchStatuses = dispatchStatuses(page.getRecords());
@@ -537,8 +537,9 @@ public class LastlegOrderService {
         final int batchSize = 1000;
         long page = 1;
         while (true) {
-            List<LastlegOrder> orders = orderMapper.selectPage(new com.baomidou.mybatisplus.extension.plugins.pagination.Page<>(page, batchSize),
+            Page<LastlegOrder> result = orderMapper.selectPage(new Page<>(page, batchSize),
-                filter(customerId, query).orderByDesc(LastlegOrder::getCreatedAt).orderByDesc(LastlegOrder::getId)).getRecords();
+                filter(customerId, query).orderByDesc(LastlegOrder::getCreatedAt).orderByDesc(LastlegOrder::getId));
+            List<LastlegOrder> orders = result.getRecords();
             if (orders.isEmpty()) break;
             Map<String, String> containerNodes = containerNodes(orders);
             for (LastlegOrder order : orders) {
@@ -558,7 +559,8 @@ public class LastlegOrderService {
                 output.write(line.getBytes(StandardCharsets.UTF_8));
             }
             output.flush();
-            if (orders.size() < batchSize) break;
+            // The pagination interceptor may cap the requested batch size.
+            if (!result.hasNext()) break;
             page++;
         }
     }

lastleg-service/src/test/java/com/baiyue/lastleg/service/LastlegOrderServiceTest.java

@@ -414,6 +414,27 @@ class LastlegOrderServiceTest {
         assertEquals("处理中", LastlegOrderStatus.labelOf("PROCESSING"));
     }
 
+    @Test
+    void exportContinuesAfterThePaginationInterceptorCapsTheBatchSize() {
+        when(orders.selectPage(any(), any())).thenAnswer(invocation -> {
+            com.baomidou.mybatisplus.extension.plugins.pagination.Page<LastlegOrder> page = invocation.getArgument(0);
+            page.setSize(500);
+            page.setTotal(501);
+            long start = (page.getCurrent() - 1) * page.getSize() + 1;
+            page.setRecords(java.util.stream.LongStream.rangeClosed(start, Math.min(start + 499, 501))
+                .mapToObj(id -> order(id, "100", "PENDING_ASSIGNMENT", null)).toList());
+            return page;
+        });
+        var query = new LastlegOrderRequests.Query(1L, 20L, null, null, null, null, null, null,
+            null, null, null, null, null, null, null, null, LastlegOrderRequests.SailingStage.BEFORE_DEPARTURE);
+
+        String csv = new String(service.exportCsv("100", query), StandardCharsets.UTF_8);
+
+        assertEquals(502, csv.lines().count());
+        assertTrue(csv.contains("\"LM-501\""));
+        verify(orders, org.mockito.Mockito.times(2)).selectPage(any(), any());
+    }
+
     @Test
     void pageWarehouseFilterMatchesFrozenWarehouseName() {
         assertWarehouseFilter("洛杉矶仓", "洛杉矶仓", true);