diff --git a/apps/api/app/api/routes/generation_preview.py b/apps/api/app/api/routes/generation_preview.py
index 0ea4d7edf..db4390203 100755
--- a/apps/api/app/api/routes/generation_preview.py
+++ b/apps/api/app/api/routes/generation_preview.py
@@ -67,7 +67,9 @@ def _calc_preview_resolution(video_ratio: str = "") -> str:
     return ratio_map.get(video_ratio.strip(), PREVIEW_RESOLUTION)
 
 
-def _infer_video_ratio_from_template(template_id: str, db: Session) -> str:
+def _infer_video_ratio_from_template(
+    template_id: str, db: Session, user_id: str = ""
+) -> str:
     """从模板 mode 推断视频比例，前端未传 video_ratio 时使用。
 
     Returns:
@@ -77,7 +79,7 @@ def _infer_video_ratio_from_template(template_id: str, db: Session) -> str:
         return ""
     try:
         repo = SQLAlchemyTemplateRepository(db)
-        template = repo.get_by_id(template_id)
+        template = repo.get(template_id, user_id)
         if template:
             mode = getattr(template, "mode", "") or ""
             ratio = _TEMPLATE_MODE_TO_RATIO.get(mode.strip(), "")
@@ -230,7 +232,7 @@ def create_preview_generation_task(
     # 确定视频比例：优先前端传入，否则从模板 mode 推断
     video_ratio = request.video_ratio or ""
     if not video_ratio and request.template_id:
-        video_ratio = _infer_video_ratio_from_template(request.template_id, db)
+        video_ratio = _infer_video_ratio_from_template(request.template_id, db, user_id)
 
     use_case = CreateGenerationTaskUseCase(generation_task_repository)
 
diff --git a/tests/unit/test_generation_preview.py b/tests/unit/test_generation_preview.py
index 11b584146..b23c6499c 100755
--- a/tests/unit/test_generation_preview.py
+++ b/tests/unit/test_generation_preview.py
@@ -1174,8 +1174,8 @@ class TestInferVideoRatioFromTemplate:
         mock_db = MagicMock()
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
-            MockRepo.return_value.get_by_id.return_value = mock_template
-            result = _infer_video_ratio_from_template("tpl_001", mock_db)
+            MockRepo.return_value.get.return_value = mock_template
+            result = _infer_video_ratio_from_template("tpl_001", mock_db, "user_1")
         assert result == "9:16"
 
     def test_standard_mode_returns_16_9(self):
@@ -1187,8 +1187,8 @@ class TestInferVideoRatioFromTemplate:
         mock_db = MagicMock()
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
-            MockRepo.return_value.get_by_id.return_value = mock_template
-            result = _infer_video_ratio_from_template("tpl_001", mock_db)
+            MockRepo.return_value.get.return_value = mock_template
+            result = _infer_video_ratio_from_template("tpl_001", mock_db, "user_1")
         assert result == "16:9"
 
     def test_unknown_mode_returns_empty(self):
@@ -1200,8 +1200,8 @@ class TestInferVideoRatioFromTemplate:
         mock_db = MagicMock()
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
-            MockRepo.return_value.get_by_id.return_value = mock_template
-            result = _infer_video_ratio_from_template("tpl_001", mock_db)
+            MockRepo.return_value.get.return_value = mock_template
+            result = _infer_video_ratio_from_template("tpl_001", mock_db, "user_1")
         assert result == ""
 
     def test_template_not_found_returns_empty(self):
@@ -1211,8 +1211,8 @@ class TestInferVideoRatioFromTemplate:
         mock_db = MagicMock()
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
-            MockRepo.return_value.get_by_id.return_value = None
-            result = _infer_video_ratio_from_template("nonexistent", mock_db)
+            MockRepo.return_value.get.return_value = None
+            result = _infer_video_ratio_from_template("nonexistent", mock_db, "user_1")
         assert result == ""
 
     def test_empty_template_id_returns_empty(self):
@@ -1220,7 +1220,7 @@ class TestInferVideoRatioFromTemplate:
         from app.api.routes.generation_preview import _infer_video_ratio_from_template
 
         mock_db = MagicMock()
-        result = _infer_video_ratio_from_template("", mock_db)
+        result = _infer_video_ratio_from_template("", mock_db, "user_1")
         assert result == ""
 
     def test_db_exception_returns_empty(self):
@@ -1231,7 +1231,7 @@ class TestInferVideoRatioFromTemplate:
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
             MockRepo.side_effect = Exception("db connection error")
-            result = _infer_video_ratio_from_template("tpl_001", mock_db)
+            result = _infer_video_ratio_from_template("tpl_001", mock_db, "user_1")
         assert result == ""
 
 
@@ -1265,7 +1265,7 @@ class TestPreviewRouteAutoInfersVideoRatio:
         )
 
         with patch("app.api.routes.generation_preview.SQLAlchemyTemplateRepository") as MockRepo:
-            MockRepo.return_value.get_by_id.return_value = mock_template
+            MockRepo.return_value.get.return_value = mock_template
             with patch("app.api.routes.generation_preview.CreateGenerationTaskUseCase") as MockUC:
                 MockUC.return_value.execute.return_value = task
                 with patch(