fix: Fix Astra DB collection indexing params (#4255)

Fix Astra DB collection indexing params

src/backend/base/langflow/components/vectorstores/astradb.py

@@ -1,5 +1,6 @@
 import os
 
+import orjson
 from astrapy.admin import parse_api_endpoint
 from loguru import logger
 
@@ -116,6 +117,7 @@ class AstraVectorStoreComponent(LCVectorStoreComponent):
             display_name="Metric",
             info="Optional distance metric for vector comparisons in the vector store.",
             options=["cosine", "dot_product", "euclidean"],
+            value="cosine",
             advanced=True,
         ),
         IntInput(
@@ -145,8 +147,8 @@ class AstraVectorStoreComponent(LCVectorStoreComponent):
         DropdownInput(
             name="setup_mode",
             display_name="Setup Mode",
-            info="Configuration mode for setting up the vector store, with options like 'Sync', 'Async', or 'Off'.",
-            options=["Sync", "Async", "Off"],
+            info="Configuration mode for setting up the vector store, with options like 'Sync' or 'Off'.",
+            options=["Sync", "Off"],
             advanced=True,
             value="Sync",
         ),
@@ -160,18 +162,21 @@ class AstraVectorStoreComponent(LCVectorStoreComponent):
             name="metadata_indexing_include",
             display_name="Metadata Indexing Include",
             info="Optional list of metadata fields to include in the indexing.",
+            is_list=True,
             advanced=True,
         ),
         StrInput(
             name="metadata_indexing_exclude",
             display_name="Metadata Indexing Exclude",
             info="Optional list of metadata fields to exclude from the indexing.",
+            is_list=True,
             advanced=True,
         ),
         StrInput(
             name="collection_indexing_policy",
             display_name="Collection Indexing Policy",
-            info="Optional dictionary defining the indexing policy for the collection.",
+            info='Optional JSON string for the "indexing" field of the collection. '
+            "See https://docs.datastax.com/en/astra-db-serverless/api-reference/collections.html#the-indexing-option",
             advanced=True,
         ),
         IntInput(
@@ -401,31 +406,27 @@ class AstraVectorStoreComponent(LCVectorStoreComponent):
                 ),
             }
 
-        vector_store_kwargs = {
-            **embedding_dict,
-            "collection_name": self.collection_name,
-            "token": self.token,
-            "api_endpoint": self.api_endpoint,
-            "namespace": self.namespace or None,
-            "environment": parse_api_endpoint(self.api_endpoint).environment,
-            "metric": self.metric or None,
-            "batch_size": self.batch_size or None,
-            "bulk_insert_batch_concurrency": self.bulk_insert_batch_concurrency or None,
-            "bulk_insert_overwrite_concurrency": self.bulk_insert_overwrite_concurrency or None,
-            "bulk_delete_concurrency": self.bulk_delete_concurrency or None,
-            "setup_mode": setup_mode_value,
-            "pre_delete_collection": self.pre_delete_collection or False,
-        }
-
-        if self.metadata_indexing_include:
-            vector_store_kwargs["metadata_indexing_include"] = self.metadata_indexing_include
-        elif self.metadata_indexing_exclude:
-            vector_store_kwargs["metadata_indexing_exclude"] = self.metadata_indexing_exclude
-        elif self.collection_indexing_policy:
-            vector_store_kwargs["collection_indexing_policy"] = self.collection_indexing_policy
-
         try:
-            vector_store = AstraDBVectorStore(**vector_store_kwargs)
+            vector_store = AstraDBVectorStore(
+                collection_name=self.collection_name,
+                token=self.token,
+                api_endpoint=self.api_endpoint,
+                namespace=self.namespace or None,
+                environment=parse_api_endpoint(self.api_endpoint).environment,
+                metric=self.metric,
+                batch_size=self.batch_size or None,
+                bulk_insert_batch_concurrency=self.bulk_insert_batch_concurrency or None,
+                bulk_insert_overwrite_concurrency=self.bulk_insert_overwrite_concurrency or None,
+                bulk_delete_concurrency=self.bulk_delete_concurrency or None,
+                setup_mode=setup_mode_value,
+                pre_delete_collection=self.pre_delete_collection,
+                metadata_indexing_include=[s for s in self.metadata_indexing_include if s],
+                metadata_indexing_exclude=[s for s in self.metadata_indexing_exclude if s],
+                collection_indexing_policy=orjson.dumps(self.collection_indexing_policy)
+                if self.collection_indexing_policy
+                else None,
+                **embedding_dict,
+            )
         except Exception as e:
             msg = f"Error initializing AstraDBVectorStore: {e}"
             raise ValueError(msg) from e