chore: adopt StrEnum and auto() for some string-typed enums (#25129)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>

api/core/workflow/graph_engine/entities/runtime_route_state.py

@@ -1,6 +1,6 @@
 import uuid
 from datetime import datetime
-from enum import Enum
+from enum import StrEnum, auto
 from typing import Optional
 
 from pydantic import BaseModel, Field
@@ -11,12 +11,12 @@ from libs.datetime_utils import naive_utc_now
 
 
 class RouteNodeState(BaseModel):
-    class Status(Enum):
-        RUNNING = "running"
-        SUCCESS = "success"
-        FAILED = "failed"
-        PAUSED = "paused"
-        EXCEPTION = "exception"
+    class Status(StrEnum):
+        RUNNING = auto()
+        SUCCESS = auto()
+        FAILED = auto()
+        PAUSED = auto()
+        EXCEPTION = auto()
 
     id: str = Field(default_factory=lambda: str(uuid.uuid4()))
     """node state id"""

api/core/workflow/nodes/agent/entities.py

@@ -1,4 +1,4 @@
-from enum import Enum, StrEnum
+from enum import IntEnum, StrEnum, auto
 from typing import Any, Literal, Union
 
 from pydantic import BaseModel
@@ -25,9 +25,9 @@ class AgentNodeData(BaseNodeData):
     agent_parameters: dict[str, AgentInput]
 
 
-class ParamsAutoGenerated(Enum):
-    CLOSE = 0
-    OPEN = 1
+class ParamsAutoGenerated(IntEnum):
+    CLOSE = auto()
+    OPEN = auto()
 
 
 class AgentOldVersionModelFeatures(StrEnum):
@@ -38,8 +38,8 @@ class AgentOldVersionModelFeatures(StrEnum):
     TOOL_CALL = "tool-call"
     MULTI_TOOL_CALL = "multi-tool-call"
     AGENT_THOUGHT = "agent-thought"
-    VISION = "vision"
+    VISION = auto()
     STREAM_TOOL_CALL = "stream-tool-call"
-    DOCUMENT = "document"
-    VIDEO = "video"
-    AUDIO = "audio"
+    DOCUMENT = auto()
+    VIDEO = auto()
+    AUDIO = auto()

api/core/workflow/nodes/answer/entities.py

@@ -1,5 +1,5 @@
 from collections.abc import Sequence
-from enum import Enum
+from enum import StrEnum, auto
 
 from pydantic import BaseModel, Field
 
@@ -19,9 +19,9 @@ class GenerateRouteChunk(BaseModel):
     Generate Route Chunk.
     """
 
-    class ChunkType(Enum):
-        VAR = "var"
-        TEXT = "text"
+    class ChunkType(StrEnum):
+        VAR = auto()
+        TEXT = auto()
 
     type: ChunkType = Field(..., description="generate route chunk type")
 

api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py

@@ -259,7 +259,7 @@ class KnowledgeRetrievalNode(BaseNode):
         )
         all_documents = []
         dataset_retrieval = DatasetRetrieval()
-        if node_data.retrieval_mode == DatasetRetrieveConfigEntity.RetrieveStrategy.SINGLE.value:
+        if node_data.retrieval_mode == DatasetRetrieveConfigEntity.RetrieveStrategy.SINGLE:
             # fetch model config
             if node_data.single_retrieval_config is None:
                 raise ValueError("single_retrieval_config is required")
@@ -291,7 +291,7 @@ class KnowledgeRetrievalNode(BaseNode):
                     metadata_filter_document_ids=metadata_filter_document_ids,
                     metadata_condition=metadata_condition,
                 )
-        elif node_data.retrieval_mode == DatasetRetrieveConfigEntity.RetrieveStrategy.MULTIPLE.value:
+        elif node_data.retrieval_mode == DatasetRetrieveConfigEntity.RetrieveStrategy.MULTIPLE:
             if node_data.multiple_retrieval_config is None:
                 raise ValueError("multiple_retrieval_config is required")
             if node_data.multiple_retrieval_config.reranking_mode == "reranking_model":