Remove support for annotated partials

Author: mvanderlee

marshmallow_dataclass/__init__.py

@@ -755,8 +755,6 @@ def _field_for_annotated_type(
                 is_generic_type(arg)
                 and _is_marshmallow_field(typing_extensions.get_origin(arg))
             )
-            # Support `partial(mf.List, mf.String)`
-            or (isinstance(arg, partial) and _is_marshmallow_field(arg.func))
         ]
         if marshmallow_annotations:
             if len(marshmallow_annotations) > 1:

tests/test_annotated.py

@@ -1,8 +1,6 @@
-import dataclasses
-import functools
 import sys
 import unittest
-from typing import List, Optional
+from typing import Optional
 
 import marshmallow
 import marshmallow.fields
@@ -37,32 +35,3 @@ class AnnotatedValue:
 
         with self.assertRaises(marshmallow.exceptions.ValidationError):
             schema.load({"value": "notavalidemail"})
-
-    def test_annotated_partial_field(self) -> None:
-        """
-        NewType allowed us to specify a lambda or partial because there was no type inspection.
-        But with Annotated we do type inspection. Partial still allows us to to type inspection.
-        """
-
-        @dataclass
-        class AnnotatedValue:
-            emails: Annotated[
-                List[str],
-                functools.partial(marshmallow.fields.List, marshmallow.fields.Email),
-            ] = dataclasses.field(default_factory=lambda: ["default@email.com"])
-
-        schema = AnnotatedValue.Schema()  # type: ignore[attr-defined]
-
-        self.assertEqual(
-            schema.load({}),
-            AnnotatedValue(emails=["default@email.com"]),
-        )
-        self.assertEqual(
-            schema.load({"emails": ["test@test.com"]}),
-            AnnotatedValue(
-                emails=["test@test.com"],
-            ),
-        )
-
-        with self.assertRaises(marshmallow.exceptions.ValidationError):
-            schema.load({"emails": "notavalidemail"})