fix(generation): reject empty @ references

backend/apps/generation/views.py

@@ -1,4 +1,5 @@
 import logging
+import re
 
 from rest_framework import status
 from rest_framework.decorators import api_view, permission_classes, parser_classes
@@ -90,6 +91,14 @@ def _format_prompt_for_ark(prompt, label_placeholders):
     return result
 
 
+_ORPHAN_MATERIAL_MENTION_RE = re.compile(r'@(?:图片|视频|音频|素材)\S*')
+
+
+def _has_orphan_material_mention(prompt, references):
+    """Detect a material @mention in prompt when no reference payload arrived."""
+    return bool(prompt and not references and _ORPHAN_MATERIAL_MENTION_RE.search(prompt))
+
+
 def _get_token_price(config, model, has_video_ref, resolution):
     """根据模型、是否含视频、分辨率选择单价。
 
@@ -226,9 +235,21 @@ def video_generate_view(request):
     aspect_ratio = serializer.validated_data['aspect_ratio']
     # serializer 已设 default='720p' + choices 约束，validated_data 必有合法值
     resolution = serializer.validated_data['resolution']
+    references = serializer.validated_data.get('references', [])
     search_mode = request.data.get('search_mode', 'off')
     seed = _safe_int(request.data.get('seed', -1), -1)
 
+    if _has_orphan_material_mention(prompt, references):
+        logger.warning(
+            'Blocked generate with material @mention but empty references (user=%s prompt=%s)',
+            user.id,
+            prompt[:120],
+        )
+        return Response({
+            'error': 'missing_references',
+            'message': '@对应的内容为空',
+        }, status=status.HTTP_400_BAD_REQUEST)
+
     # 1080P 仅 Seedance 2.0 支持，Fast 不支持
     if resolution == '1080p' and model == 'seedance_2.0_fast':
         return Response({
@@ -238,7 +259,6 @@ def video_generate_view(request):
 
     # ── 预估 token 和费用 ──
     config = QuotaConfig.objects.get_or_create(pk=1)[0]
-    references = request.data.get('references', [])
     w, h = get_resolution(aspect_ratio, resolution)
     has_video_ref = _has_video_reference(references)
     input_video_dur = _sum_video_duration(references) if has_video_ref else 0
@@ -335,7 +355,6 @@ def video_generate_view(request):
             }, status=status.HTTP_429_TOO_MANY_REQUESTS)
 
         # 构建参考素材
-        references = request.data.get('references', [])
         # 火山限制最多 9 张参考图片
         image_count = sum(1 for r in references if r.get('type', 'image') == 'image')
         if image_count > 9:

backend/tests/test_ark_prompt_format.py

@@ -146,6 +146,16 @@ class TestVideoGenerateArkPrompt(TestCase):
             'references': references,
         }, format='json')
 
+    @mock.patch('apps.generation.views.create_task')
+    def test_reject_material_mention_without_references(self, mock_create_task):
+        """事故回归：prompt 含 @图片 但 references 为空时，不能创建 refs=0 脏任务。"""
+        resp = self._post_generate('@图片1 走过来', [])
+        self.assertEqual(resp.status_code, 400, resp.content)
+        self.assertEqual(resp.json().get('error'), 'missing_references')
+        self.assertEqual(resp.json().get('message'), '@对应的内容为空')
+        self.assertFalse(mock_create_task.called)
+        self.assertFalse(GenerationRecord.objects.filter(user=self.user).exists())
+
     @mock.patch('apps.generation.tasks.poll_video_task')
     @mock.patch('apps.generation.views.create_task')
     def test_view_converts_prompt_for_local_assets(self, mock_create_task, mock_poll):