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fix(deepseek): accept base_url as alias for api_base (#35789)

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Add `base_url` as a Pydantic alias for `ChatDeepSeek.api_base`, so users
can pass `base_url=` when constructing the model.
This commit is contained in:
Mason Daugherty
2026-03-12 10:27:34 -04:00
committed by GitHub
parent 5d9568b5f5
commit b676167707
3 changed files with 22 additions and 9 deletions
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6
libs/partners/deepseek/langchain_deepseek/chat_models.py
View File

@@ -189,9 +189,13 @@ class ChatDeepSeek(BaseChatOpenAI):
)
"""DeepSeek API key"""
api_base: str = Field(
alias="base_url",
default_factory=from_env("DEEPSEEK_API_BASE", default=DEFAULT_API_BASE),
)
"""DeepSeek API base URL"""
"""DeepSeek API base URL.
Automatically read from env variable `DEEPSEEK_API_BASE` if not provided.
"""
model_config = ConfigDict(populate_by_name=True)

13
libs/partners/deepseek/tests/unit_tests/test_chat_models.py
View File

@@ -104,6 +104,15 @@ class TestChatDeepSeekUnit(ChatModelUnitTests):
class TestChatDeepSeekCustomUnit:
"""Custom tests specific to DeepSeek chat model."""
def test_base_url_alias(self) -> None:
"""Test that `base_url` is accepted as an alias for `api_base`."""
chat_model = ChatDeepSeek(
model=MODEL_NAME,
api_key=SecretStr("api_key"),
base_url="http://example.test/v1",
)
assert chat_model.api_base == "http://example.test/v1"
def test_create_chat_result_with_reasoning_content(self) -> None:
"""Test that reasoning_content is properly extracted from response."""
chat_model = ChatDeepSeek(model=MODEL_NAME, api_key=SecretStr("api_key"))
@@ -329,7 +338,7 @@ class TestChatDeepSeekAzureToolChoice:
return ChatDeepSeek(
model="deepseek-chat",
api_key=SecretStr("test_key"),
api_base=endpoint,
base_url=endpoint,
)
def test_is_azure_endpoint_detection(self) -> None:
@@ -356,7 +365,7 @@ class TestChatDeepSeekAzureToolChoice:
llm = ChatDeepSeek(
model="deepseek-chat",
api_key=SecretStr("test_key"),
api_base=endpoint,
base_url=endpoint,
)
assert not llm._is_azure_endpoint, f"Expected non-Azure for {endpoint}"

12
libs/partners/deepseek/uv.lock generated
View File

@@ -370,7 +370,7 @@ wheels = [
[[package]]
name = "langchain-core"
version = "1.2.14"
version = "1.2.18"
source = { editable = "../../core" }
dependencies = [
{ name = "jsonpatch" },
@@ -477,7 +477,7 @@ typing = [{ name = "mypy", specifier = ">=1.10.0,<2.0.0" }]
[[package]]
name = "langchain-openai"
version = "1.1.10"
version = "1.1.11"
source = { editable = "../openai" }
dependencies = [
{ name = "langchain-core" },
@@ -488,7 +488,7 @@ dependencies = [
[package.metadata]
requires-dist = [
{ name = "langchain-core", editable = "../../core" },
{ name = "openai", specifier = ">=2.20.0,<3.0.0" },
{ name = "openai", specifier = ">=2.26.0,<3.0.0" },
{ name = "tiktoken", specifier = ">=0.7.0,<1.0.0" },
]
@@ -819,7 +819,7 @@ wheels = [
[[package]]
name = "openai"
version = "2.21.0"
version = "2.26.0"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "anyio" },
@@ -831,9 +831,9 @@ dependencies = [
{ name = "tqdm" },
{ name = "typing-extensions" },
]
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[[package]]