Support knowledge metadata filter (#15982)

api/services/entities/knowledge_entities/knowledge_entities.py

@@ -125,3 +125,36 @@ class SegmentUpdateArgs(BaseModel):
 class ChildChunkUpdateArgs(BaseModel):
     id: Optional[str] = None
     content: str
+
+
+class MetadataArgs(BaseModel):
+    type: Literal["string", "number", "time"]
+    name: str
+
+
+class MetadataUpdateArgs(BaseModel):
+    name: str
+    value: Optional[str | int | float] = None
+
+
+class MetadataValueUpdateArgs(BaseModel):
+    fields: list[MetadataUpdateArgs]
+
+
+class MetadataDetail(BaseModel):
+    id: str
+    name: str
+    value: Optional[str | int | float] = None
+
+
+class DocumentMetadataOperation(BaseModel):
+    document_id: str
+    metadata_list: list[MetadataDetail]
+
+
+class MetadataOperationData(BaseModel):
+    """
+    Metadata operation data
+    """
+
+    operation_data: list[DocumentMetadataOperation]