feat: adding count with filtering operations to OpenSearchDocumentStore (#2653)

* fixed metadata merging to properly update the meta key

* formmatting

* adding count distinct metadata values

* refactoring to reduce duplicated code

* adding get metadata info

* adding get_field_max_min

* fixing get_field_max_min

* adding get_field_unique_values

* adding get_field_unique_values async

* formmatting

* updating tests

* formmatting

* cleaning up

* adding httpx as a dependency

* fixing pyproject.toml

* updating tests: making use of the new refresh feature

* dealing with special fields

* docstring update

* adding roundtrip tests to assert documents metadata is correctly written and retrieved

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* updating function names

* updating function names + tests

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* updating function names + tests

* adding SQLRetriever + tests

* adding missing files

* adding missing files

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* PR comments/fixes

* fixes

* improving docstring

* updating docs

* removing all SQLRetriever related code

* removing all SQLRetriever related code

* cleaning up typo

* updating init

* reverting docs updated

* removing tests for SQLRetrieve

* fixing after sync with main

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* Update integrations/opensearch/src/haystack_integrations/document_stores/opensearch/document_store.py

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

* removing SQLResponse/Retriever related code

* new line at end of file

* updating return value on get_metadata_field_unique + count_unique_metadata_by_filter

* updating params name

* updating document_store.get_metadata_field_unique_values

* removing ResponseFormat

---------

Co-authored-by: Sebastian Husch Lee <10526848+sjrl@users.noreply.github.com>

Author: davidsbatista

integrations/opensearch/pyproject.toml

@@ -24,7 +24,8 @@ classifiers = [
 ]
 dependencies = [
   "haystack-ai>=2.22.0",
-  "opensearch-py[async]>=2.4.0,<3"]
+  "opensearch-py[async]>=2.4.0,<3"
+]
 
 [project.urls]
 Documentation = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/opensearch#readme"