fix: add delete_by_filter_async to InMemoryDocumentStore

haystack/document_stores/in_memory/document_store.py

@@ -999,6 +999,19 @@ async def delete_documents_async(self, document_ids: list[str]) -> None:
             self.executor, lambda: self.delete_documents(document_ids=document_ids)
         )
 
+    async def delete_by_filter_async(self, filters: dict[str, Any]) -> int:
+        """
+        Deletes all documents that match the provided filters.
+
+        :param filters: The filters to apply to select documents for deletion.
+            For filter syntax, see filter_documents.
+        :returns: The number of documents deleted.
+        :raises ValueError: if filters have invalid syntax.
+        """
+        return await asyncio.get_running_loop().run_in_executor(
+            self.executor, lambda: self.delete_by_filter(filters=filters)
+        )
+
     async def update_by_filter_async(self, filters: dict[str, Any], meta: dict[str, Any]) -> int:
         """
         Updates the metadata of all documents that match the provided filters.

releasenotes/notes/add-delete-by-filter-async-to-inmemory-document-store-d2ad39eab1332c07.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Added the missing ``delete_by_filter_async()`` method to ``InMemoryDocumentStore``.
+    Previously, only the sync ``delete_by_filter()`` was available, unlike the other methods of the store,
+    which all have an async counterpart. The new method runs ``delete_by_filter()`` in the store's
+    thread-pool executor and returns the number of deleted documents.

test/document_stores/test_in_memory.py

@@ -35,6 +35,7 @@
     CountDocumentsByFilterAsyncTest,
     CountUniqueMetadataByFilterAsyncTest,
     DeleteAllAsyncTest,
+    DeleteByFilterAsyncTest,
     DeleteDocumentsAsyncTest,
     FilterDocumentsAsyncTest,
     GetMetadataFieldMinMaxAsyncTest,
@@ -52,6 +53,7 @@ class TestMemoryDocumentStore(
     CountDocumentsAsyncTest,
     WriteDocumentsAsyncTest,
     DeleteAllAsyncTest,
+    DeleteByFilterAsyncTest,
     DeleteDocumentsAsyncTest,
     CountDocumentsByFilterTest,
     CountUniqueMetadataByFilterAsyncTest,