fix(api): fix the issue that workflow_runs.started_at is overwritten while resuming (#32851)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/tests/unit_tests/conftest.py

@@ -32,11 +32,6 @@ os.environ.setdefault("OPENDAL_SCHEME", "fs")
 os.environ.setdefault("OPENDAL_FS_ROOT", "/tmp/dify-storage")
 os.environ.setdefault("STORAGE_TYPE", "opendal")
 
-# Add the API directory to Python path to ensure proper imports
-import sys
-
-sys.path.insert(0, PROJECT_DIR)
-
 from core.db.session_factory import configure_session_factory, session_factory
 from extensions import ext_redis
 

api/tests/unit_tests/core/app/apps/test_pause_resume.py

@@ -1,13 +1,8 @@
 import sys
 import time
-from pathlib import Path
 from types import ModuleType, SimpleNamespace
 from typing import Any
 
-API_DIR = str(Path(__file__).resolve().parents[5])
-if API_DIR not in sys.path:
-    sys.path.insert(0, API_DIR)
-
 import dify_graph.nodes.human_input.entities  # noqa: F401
 from core.app.apps.advanced_chat import app_generator as adv_app_gen_module
 from core.app.apps.workflow import app_generator as wf_app_gen_module

api/tests/unit_tests/core/repositories/test_sqlalchemy_workflow_execution_repository.py

@@ -0,0 +1,84 @@
+from datetime import datetime
+from unittest.mock import MagicMock
+from uuid import uuid4
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from core.repositories.sqlalchemy_workflow_execution_repository import SQLAlchemyWorkflowExecutionRepository
+from dify_graph.entities.workflow_execution import WorkflowExecution, WorkflowType
+from models import Account, WorkflowRun
+from models.enums import WorkflowRunTriggeredFrom
+
+
+def _build_repository_with_mocked_session(session: MagicMock) -> SQLAlchemyWorkflowExecutionRepository:
+    engine = create_engine("sqlite:///:memory:")
+    real_session_factory = sessionmaker(bind=engine, expire_on_commit=False)
+
+    user = MagicMock(spec=Account)
+    user.id = str(uuid4())
+    user.current_tenant_id = str(uuid4())
+
+    repository = SQLAlchemyWorkflowExecutionRepository(
+        session_factory=real_session_factory,
+        user=user,
+        app_id="app-id",
+        triggered_from=WorkflowRunTriggeredFrom.APP_RUN,
+    )
+
+    session_context = MagicMock()
+    session_context.__enter__.return_value = session
+    session_context.__exit__.return_value = False
+    repository._session_factory = MagicMock(return_value=session_context)
+    return repository
+
+
+def _build_execution(*, execution_id: str, started_at: datetime) -> WorkflowExecution:
+    return WorkflowExecution.new(
+        id_=execution_id,
+        workflow_id="workflow-id",
+        workflow_type=WorkflowType.WORKFLOW,
+        workflow_version="1.0.0",
+        graph={"nodes": [], "edges": []},
+        inputs={"query": "hello"},
+        started_at=started_at,
+    )
+
+
+def test_save_uses_execution_started_at_when_record_does_not_exist():
+    session = MagicMock()
+    session.get.return_value = None
+    repository = _build_repository_with_mocked_session(session)
+
+    started_at = datetime(2026, 1, 1, 12, 0, 0)
+    execution = _build_execution(execution_id=str(uuid4()), started_at=started_at)
+
+    repository.save(execution)
+
+    saved_model = session.merge.call_args.args[0]
+    assert saved_model.created_at == started_at
+    session.commit.assert_called_once()
+
+
+def test_save_preserves_existing_created_at_when_record_already_exists():
+    session = MagicMock()
+    repository = _build_repository_with_mocked_session(session)
+
+    execution_id = str(uuid4())
+    existing_created_at = datetime(2026, 1, 1, 12, 0, 0)
+    existing_run = WorkflowRun()
+    existing_run.id = execution_id
+    existing_run.tenant_id = repository._tenant_id
+    existing_run.created_at = existing_created_at
+    session.get.return_value = existing_run
+
+    execution = _build_execution(
+        execution_id=execution_id,
+        started_at=datetime(2026, 1, 1, 12, 30, 0),
+    )
+
+    repository.save(execution)
+
+    saved_model = session.merge.call_args.args[0]
+    assert saved_model.created_at == existing_created_at
+    session.commit.assert_called_once()

api/tests/unit_tests/core/workflow/graph_engine/test_mock_iteration_simple.py

@@ -2,15 +2,7 @@
 Simple test to verify MockNodeFactory works with iteration nodes.
 """
 
-import sys
-from pathlib import Path
-
 from dify_graph.entities.graph_init_params import DIFY_RUN_CONTEXT_KEY
-
-# Add api directory to path
-api_dir = Path(__file__).parent.parent.parent.parent.parent.parent
-sys.path.insert(0, str(api_dir))
-
 from dify_graph.enums import NodeType
 from tests.unit_tests.core.workflow.graph_engine.test_mock_config import MockConfigBuilder
 from tests.unit_tests.core.workflow.graph_engine.test_mock_factory import MockNodeFactory

api/tests/unit_tests/core/workflow/graph_engine/test_mock_simple.py

@@ -3,14 +3,8 @@ Simple test to validate the auto-mock system without external dependencies.
 """
 
 import sys
-from pathlib import Path
 
 from dify_graph.entities.graph_init_params import DIFY_RUN_CONTEXT_KEY
-
-# Add api directory to path
-api_dir = Path(__file__).parent.parent.parent.parent.parent.parent
-sys.path.insert(0, str(api_dir))
-
 from dify_graph.enums import NodeType
 from tests.unit_tests.core.workflow.graph_engine.test_mock_config import MockConfig, MockConfigBuilder, NodeMockConfig
 from tests.unit_tests.core.workflow.graph_engine.test_mock_factory import MockNodeFactory