fix: metadata filter not work (#19020)

Co-authored-by: 金鹏程 <jinpengcheng01@corp.netease.com>
Co-authored-by: crazywoola <427733928@qq.com>

api/core/tools/utils/dataset_retriever/dataset_retriever_tool.py

@@ -4,6 +4,7 @@ from pydantic import BaseModel, Field
 
 from core.rag.datasource.retrieval_service import RetrievalService
 from core.rag.entities.context_entities import DocumentContext
+from core.rag.entities.metadata_entities import MetadataCondition
 from core.rag.models.document import Document as RetrievalDocument
 from core.rag.retrieval.retrieval_methods import RetrievalMethod
 from core.tools.utils.dataset_retriever.dataset_retriever_base_tool import DatasetRetrieverBaseTool
@@ -33,6 +34,7 @@ class DatasetRetrieverTool(DatasetRetrieverBaseTool):
     args_schema: type[BaseModel] = DatasetRetrieverToolInput
     description: str = "use this to retrieve a dataset. "
     dataset_id: str
+    metadata_filtering_conditions: MetadataCondition
 
     @classmethod
     def from_dataset(cls, dataset: Dataset, **kwargs):
@@ -46,6 +48,7 @@ class DatasetRetrieverTool(DatasetRetrieverBaseTool):
             tenant_id=dataset.tenant_id,
             dataset_id=dataset.id,
             description=description,
+            metadata_filtering_conditions=MetadataCondition(),
             **kwargs,
         )
 
@@ -65,6 +68,7 @@ class DatasetRetrieverTool(DatasetRetrieverBaseTool):
                 dataset_id=dataset.id,
                 query=query,
                 external_retrieval_parameters=dataset.retrieval_model,
+                metadata_condition=self.metadata_filtering_conditions,
             )
             for external_document in external_documents:
                 document = RetrievalDocument(