Fix Langchain::Vectorsearch::Milvus initializer by passing :api_key (#939)

* Fix Langchain::Vectorsearch::Milvus initializer by passing :api_key

* CHANGELOG.md

Author: andreibondarev

CHANGELOG.md

@@ -10,6 +10,7 @@
 - [SECURITY]: A change which fixes a security vulnerability.
 
 ## [Unreleased]
+- [BUGFIX] [https://github.com/patterns-ai-core/langchainrb/pull/939] Fix Langchain::Vectorsearch::Milvus initializer by passing :api_key
 
 ## [0.19.4] - 2025-02-17
 - [BREAKING] [https://github.com/patterns-ai-core/langchainrb/pull/894] Tools can now output image_urls, and all tool output must be wrapped by a tool_response() method

lib/langchain/vectorsearch/milvus.rb

@@ -16,6 +16,7 @@ def initialize(url:, index_name:, llm:, api_key: nil)
 
       @client = ::Milvus::Client.new(
         url: url,
+        api_key: api_key,
         logger: Langchain.logger
       )
       @index_name = index_name

spec/langchain/vectorsearch/milvus_spec.rb

@@ -8,6 +8,7 @@
   subject {
     described_class.new(
       url: "http://localhost:8000",
+      api_key: "123",
       index_name: index_name,
       llm: Langchain::LLM::OpenAI.new(api_key: "123")
     )