fix: printing api problem

api_v1/views/printing/test_api.py

@@ -3,6 +3,7 @@ PrintingOrder API 测试
 """
 from datetime import datetime
 from django.test import TestCase
+from django.db import connection
 from django.conf import settings
 from django.utils import timezone
 from rest_framework.test import APIClient
@@ -170,6 +171,57 @@ class PrintingOrderAPITestCase(TestCase):
         # 分页响应格式
         self.assertEqual(response.data['count'], 2)
 
+    def test_list_pagination_keeps_rows_with_dangling_customer_reference(self):
+        """历史脏数据 customer_id 悬空时，列表分页不应被 INNER JOIN 推空。"""
+        base = timezone.now()
+        dangling = printing_models.PrintingOrder.objects.create(
+            merchant=self.merchant,
+            customer=self.customer,
+            fabric='悬空客户订单',
+            width='150cm',
+        )
+        middle = printing_models.PrintingOrder.objects.create(
+            merchant=self.merchant,
+            customer=self.customer,
+            fabric='中间订单',
+            width='150cm',
+        )
+        oldest = printing_models.PrintingOrder.objects.create(
+            merchant=self.merchant,
+            customer=self.customer,
+            fabric='最旧订单',
+            width='150cm',
+        )
+        printing_models.PrintingOrder.objects.filter(id=dangling.id).update(
+            created_at=base + timezone.timedelta(minutes=2),
+        )
+        printing_models.PrintingOrder.objects.filter(id=middle.id).update(
+            created_at=base + timezone.timedelta(minutes=1),
+        )
+        printing_models.PrintingOrder.objects.filter(id=oldest.id).update(created_at=base)
+
+        missing_customer_id = 99999999
+        with connection.cursor() as cursor:
+            cursor.execute(
+                'UPDATE printing_printingorder SET customer_id = %s WHERE id = %s',
+                [missing_customer_id, dangling.id],
+            )
+
+        try:
+            response = self.client.get(
+                '/api/v1/printing-orders/?limit=1&offset=2&ordering=-created_at',
+            )
+            self.assertEqual(response.status_code, status.HTTP_200_OK)
+            self.assertEqual(response.data['count'], 3)
+            self.assertEqual(len(response.data['results']), 1)
+            self.assertEqual(response.data['results'][0]['id'], oldest.id)
+        finally:
+            with connection.cursor() as cursor:
+                cursor.execute(
+                    'UPDATE printing_printingorder SET customer_id = %s WHERE id = %s',
+                    [self.customer.id, dangling.id],
+                )
+
     def test_list_printing_orders_default_excludes_invalid(self):
         """默认不返回作废订单；显式传 is_invalid=true 时可查询作废订单"""
         printing_models.PrintingOrder.objects.create(
@@ -443,6 +495,68 @@ class PrintingOrderAPITestCase(TestCase):
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
         self.assertIn('已经标记', response.data['detail'])
     
+    def _create_product_for_job(self, name='测试产品'):
+        category = basic_models.ProductCategory.objects.create(
+            merchant=self.merchant,
+            name=f'{name}类别',
+            product_prefix='JOB',
+        )
+        return basic_models.Product.objects.create(
+            merchant=self.merchant,
+            category=category,
+            name=name,
+            unit=basic_models.ProductUnitEnum.METER,
+        )
+
+    def test_printing_order_ids_returns_job_ids(self):
+        """测试获取订单下所有 PrintingJob ID。"""
+        order = printing_models.PrintingOrder.objects.create(
+            merchant=self.merchant,
+            customer=self.customer,
+            fabric='测试布料',
+            width='150cm',
+        )
+        product = self._create_product_for_job()
+        job1 = printing_models.PrintingJob.objects.create(
+            merchant=self.merchant,
+            printing_order=order,
+            product=product,
+            quantity=10,
+            unit='米',
+        )
+        job2 = printing_models.PrintingJob.objects.create(
+            merchant=self.merchant,
+            printing_order=order,
+            product=product,
+            quantity=20,
+            unit='米',
+        )
+
+        response = self.client.get(f'/api/v1/printing-orders/{order.id}/ids/')
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(response.data, {'ids': [job1.id, job2.id]})
+
+    def test_printing_order_ids_returns_empty_list_when_no_jobs(self):
+        """订单存在但没有任务时返回空数组。"""
+        order = printing_models.PrintingOrder.objects.create(
+            merchant=self.merchant,
+            customer=self.customer,
+            fabric='测试布料',
+            width='150cm',
+        )
+
+        response = self.client.get(f'/api/v1/printing-orders/{order.id}/ids/')
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(response.data, {'ids': []})
+
+    def test_printing_order_ids_returns_404_when_order_missing(self):
+        """订单不存在时返回 404。"""
+        response = self.client.get('/api/v1/printing-orders/99999999/ids/')
+
+        self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
+
     def test_filter_by_customer(self):
         """测试按客户过滤"""
         customer2 = basic_models.Customer.objects.create(