Fix MoonshotChat instantiate with alias (#25755)

- **Description:**
   -  Fix `MoonshotChat` instantiate with alias
   - Add `MoonshotChat` to `__init__.py`

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>

libs/community/langchain_community/chat_models/__init__.py

@@ -122,6 +122,9 @@ if TYPE_CHECKING:
     from langchain_community.chat_models.mlx import (
         ChatMLX,
     )
+    from langchain_community.chat_models.moonshot import (
+        MoonshotChat,
+    )
     from langchain_community.chat_models.oci_generative_ai import (
         ChatOCIGenAI,  # noqa: F401
     )
@@ -224,6 +227,7 @@ __all__ = [
     "JinaChat",
     "LlamaEdgeChatService",
     "MiniMaxChat",
+    "MoonshotChat",
     "PaiEasChatEndpoint",
     "PromptLayerChatOpenAI",
     "QianfanChatEndpoint",
@@ -280,6 +284,7 @@ _module_lookup = {
     "JinaChat": "langchain_community.chat_models.jinachat",
     "LlamaEdgeChatService": "langchain_community.chat_models.llama_edge",
     "MiniMaxChat": "langchain_community.chat_models.minimax",
+    "MoonshotChat": "langchain_community.chat_models.moonshot",
     "PaiEasChatEndpoint": "langchain_community.chat_models.pai_eas_endpoint",
     "PromptLayerChatOpenAI": "langchain_community.chat_models.promptlayer_openai",
     "SolarChat": "langchain_community.chat_models.solar",

libs/community/langchain_community/chat_models/moonshot.py

@@ -33,7 +33,11 @@ class MoonshotChat(MoonshotCommon, ChatOpenAI):  # type: ignore[misc]
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that the environment is set up correctly."""
         values["moonshot_api_key"] = convert_to_secret_str(
-            get_from_dict_or_env(values, "moonshot_api_key", "MOONSHOT_API_KEY")
+            get_from_dict_or_env(
+                values,
+                ["moonshot_api_key", "api_key", "openai_api_key"],
+                "MOONSHOT_API_KEY",
+            )
         )
 
         try:

libs/community/tests/integration_tests/chat_models/test_moonshot.py

@@ -1,9 +1,10 @@
 """Test Moonshot Chat Model."""
 
-from typing import Type
+from typing import Type, cast
 
 import pytest
 from langchain_core.language_models import BaseChatModel
+from langchain_core.pydantic_v1 import SecretStr
 from langchain_standard_tests.integration_tests import ChatModelIntegrationTests
 
 from langchain_community.chat_models.moonshot import MoonshotChat
@@ -21,3 +22,10 @@ class TestMoonshotChat(ChatModelIntegrationTests):
     @pytest.mark.xfail(reason="Not yet implemented.")
     def test_usage_metadata(self, model: BaseChatModel) -> None:
         super().test_usage_metadata(model)
+
+
+def test_chat_moonshot_instantiate_with_alias() -> None:
+    """Test MoonshotChat instantiate when using alias."""
+    api_key = "your-api-key"
+    chat = MoonshotChat(api_key=api_key)  # type: ignore[call-arg]
+    assert cast(SecretStr, chat.moonshot_api_key).get_secret_value() == api_key

libs/community/tests/unit_tests/chat_models/test_imports.py

@@ -48,6 +48,7 @@ EXPECTED_ALL = [
     "JinaChat",
     "LlamaEdgeChatService",
     "MiniMaxChat",
+    "MoonshotChat",
     "PaiEasChatEndpoint",
     "PromptLayerChatOpenAI",
     "SolarChat",