Fix milvus truncate

Fixed the indent bug

packages/dbgpt-ext/src/dbgpt_ext/storage/vector_store/milvus_store.py

@@ -727,29 +727,29 @@ class MilvusStore(VectorStoreBase):
             metadata_filter_expr = metadata_filters[0]
         return metadata_filter_expr
 
-def truncate(self):
-    """检测pymilvus安装"""
-    try:
-        from pymilvus import Collection, utility       
-    except ImportError:
-        raise ValueError(
-            "Could not import pymilvus python package. "
-            "Please install it with `pip install pymilvus`."
-        )
-    """安全清空 Milvus summary collection 中所有数据，但不删除 collection 本身"""
-    logger.info(f"Begin truncate Milvus collection: {self.collection_name}")
-    # 先判断 collection 是否存在
-    if utility.has_collection(self.collection_name):
-        collection = Collection(self.collection_name)
-        # Load collection 必须调用，才能执行 delete
-        collection.load()
-        # 通过pk_id删除所有数据
-        collection.delete("pk_id >= 0")
-        # flush 确保数据删除被提交
-        collection.flush()
-        logger.info(f"Truncate Milvus collection {self.collection_name} success")
-    else:
-        logger.warning(f"Collection {self.collection_name} not found, skip truncate.")
+    def truncate(self):
+        """检测pymilvus安装"""
+        try:
+            from pymilvus import Collection, utility       
+        except ImportError:
+            raise ValueError(
+                "Could not import pymilvus python package. "
+                "Please install it with `pip install pymilvus`."
+            )
+        """安全清空 Milvus summary collection 中所有数据，但不删除 collection 本身"""
+        logger.info(f"Begin truncate Milvus collection: {self.collection_name}")
+        # 先判断 collection 是否存在
+        if utility.has_collection(self.collection_name):
+            collection = Collection(self.collection_name)
+            # Load collection 必须调用，才能执行 delete
+            collection.load()
+            # 通过pk_id删除所有数据
+            collection.delete("pk_id >= 0")
+            # flush 确保数据删除被提交
+            collection.flush()
+            logger.info(f"Truncate Milvus collection {self.collection_name} success")
+        else:
+            logger.warning(f"Collection {self.collection_name} not found, skip truncate.")
         
 
     def full_text_search(