🌿 Fern Regeneration -- December 19, 2025

.fern/metadata.json

@@ -1,5 +1,5 @@
 {
-  "cliVersion": "1.9.1",
+  "cliVersion": "3.27.0",
   "generatorName": "fernapi/fern-python-sdk",
-  "generatorVersion": "4.41.1"
+  "generatorVersion": "4.41.3"
 }

pyproject.toml

@@ -3,7 +3,7 @@ name = "credal"
 
 [tool.poetry]
 name = "credal"
-version = "0.1.14"
+version = "0.1.15"
 description = ""
 readme = "README.md"
 authors = []

src/credal/core/client_wrapper.py

@@ -22,10 +22,10 @@ def __init__(
 
     def get_headers(self) -> typing.Dict[str, str]:
         headers: typing.Dict[str, str] = {
-            "User-Agent": "credal/0.1.14",
+            "User-Agent": "credal/0.1.15",
             "X-Fern-Language": "Python",
             "X-Fern-SDK-Name": "credal",
-            "X-Fern-SDK-Version": "0.1.14",
+            "X-Fern-SDK-Version": "0.1.15",
             **(self.get_custom_headers() or {}),
         }
         headers["Authorization"] = f"Bearer {self._get_api_key()}"

src/credal/core/http_client.py

@@ -14,7 +14,7 @@
 from .force_multipart import FORCE_MULTIPART
 from .jsonable_encoder import jsonable_encoder
 from .query_encoder import encode_query
-from .remove_none_from_dict import remove_none_from_dict
+from .remove_none_from_dict import remove_none_from_dict as remove_none_from_dict
 from .request_options import RequestOptions
 from httpx._types import RequestFiles
 
@@ -123,6 +123,21 @@ def _should_retry(response: httpx.Response) -> bool:
     return response.status_code >= 500 or response.status_code in retryable_400s
 
 
+def _maybe_filter_none_from_multipart_data(
+    data: typing.Optional[typing.Any],
+    request_files: typing.Optional[RequestFiles],
+    force_multipart: typing.Optional[bool],
+) -> typing.Optional[typing.Any]:
+    """
+    Filter None values from data body for multipart/form requests.
+    This prevents httpx from converting None to empty strings in multipart encoding.
+    Only applies when files are present or force_multipart is True.
+    """
+    if data is not None and isinstance(data, typing.Mapping) and (request_files or force_multipart):
+        return remove_none_from_dict(data)
+    return data
+
+
 def remove_omit_from_dict(
     original: typing.Dict[str, typing.Optional[typing.Any]],
     omit: typing.Optional[typing.Any],
@@ -244,6 +259,8 @@ def request(
         if (request_files is None or len(request_files) == 0) and force_multipart:
             request_files = FORCE_MULTIPART
 
+        data_body = _maybe_filter_none_from_multipart_data(data_body, request_files, force_multipart)
+
         response = self.httpx_client.request(
             method=method,
             url=urllib.parse.urljoin(f"{base_url}/", path),
@@ -341,6 +358,8 @@ def stream(
 
         json_body, data_body = get_request_body(json=json, data=data, request_options=request_options, omit=omit)
 
+        data_body = _maybe_filter_none_from_multipart_data(data_body, request_files, force_multipart)
+
         with self.httpx_client.stream(
             method=method,
             url=urllib.parse.urljoin(f"{base_url}/", path),
@@ -442,6 +461,8 @@ async def request(
 
         json_body, data_body = get_request_body(json=json, data=data, request_options=request_options, omit=omit)
 
+        data_body = _maybe_filter_none_from_multipart_data(data_body, request_files, force_multipart)
+
         # Add the input to each of these and do None-safety checks
         response = await self.httpx_client.request(
             method=method,
@@ -539,6 +560,8 @@ async def stream(
 
         json_body, data_body = get_request_body(json=json, data=data, request_options=request_options, omit=omit)
 
+        data_body = _maybe_filter_none_from_multipart_data(data_body, request_files, force_multipart)
+
         async with self.httpx_client.stream(
             method=method,
             url=urllib.parse.urljoin(f"{base_url}/", path),

tests/utils/test_http_client.py

@@ -1,13 +1,17 @@
 # This file was auto-generated by Fern from our API Definition.
 
-from credal.core.http_client import get_request_body
+from credal.core.http_client import get_request_body, remove_none_from_dict
 from credal.core.request_options import RequestOptions
 
 
 def get_request_options() -> RequestOptions:
     return {"additional_body_parameters": {"see you": "later"}}
 
 
+def get_request_options_with_none() -> RequestOptions:
+    return {"additional_body_parameters": {"see you": "later", "optional": None}}
+
+
 def test_get_json_request_body() -> None:
     json_body, data_body = get_request_body(json={"hello": "world"}, data=None, request_options=None, omit=None)
     assert json_body == {"hello": "world"}
@@ -59,3 +63,47 @@ def test_get_empty_json_request_body() -> None:
 
     assert json_body_extras is None
     assert data_body_extras is None
+
+
+def test_json_body_preserves_none_values() -> None:
+    """Test that JSON bodies preserve None values (they become JSON null)."""
+    json_body, data_body = get_request_body(
+        json={"hello": "world", "optional": None}, data=None, request_options=None, omit=None
+    )
+    # JSON bodies should preserve None values
+    assert json_body == {"hello": "world", "optional": None}
+    assert data_body is None
+
+
+def test_data_body_preserves_none_values_without_multipart() -> None:
+    """Test that data bodies preserve None values when not using multipart.
+
+    The filtering of None values happens in HttpClient.request/stream methods,
+    not in get_request_body. This test verifies get_request_body doesn't filter None.
+    """
+    json_body, data_body = get_request_body(
+        json=None, data={"hello": "world", "optional": None}, request_options=None, omit=None
+    )
+    # get_request_body should preserve None values in data body
+    # The filtering happens later in HttpClient.request when multipart is detected
+    assert data_body == {"hello": "world", "optional": None}
+    assert json_body is None
+
+
+def test_remove_none_from_dict_filters_none_values() -> None:
+    """Test that remove_none_from_dict correctly filters out None values."""
+    original = {"hello": "world", "optional": None, "another": "value", "also_none": None}
+    filtered = remove_none_from_dict(original)
+    assert filtered == {"hello": "world", "another": "value"}
+    # Original should not be modified
+    assert original == {"hello": "world", "optional": None, "another": "value", "also_none": None}
+
+
+def test_remove_none_from_dict_empty_dict() -> None:
+    """Test that remove_none_from_dict handles empty dict."""
+    assert remove_none_from_dict({}) == {}
+
+
+def test_remove_none_from_dict_all_none() -> None:
+    """Test that remove_none_from_dict handles dict with all None values."""
+    assert remove_none_from_dict({"a": None, "b": None}) == {}