Merge pull request #149 from ermakov-oleg/new-type-support

Added typing.NewType support

pyproject.toml

@@ -27,7 +27,6 @@ classifiers = [
 ]
 
 dependencies = [
-    "typing-inspect>=0.8.0",
     "attributes-doc",
     "typing-extensions",
 ]

python/serpyco_rs/_describe.py

@@ -258,6 +258,9 @@ def describe_type(
             return LiteralType(args=list(args), custom_encoder=custom_encoder)
         raise RuntimeError('Supported only Literal[str | int, ...]')
 
+    if _is_new_type(t):
+        return describe_type(t.__supertype__, meta, custom_type_resolver)
+
     if t is Union:
         if _NoneType in args:
             new_args = tuple(arg for arg in args if arg is not _NoneType)
@@ -555,3 +558,7 @@ def _is_frozen_dataclass(cls: Any, field: EntityField) -> bool:
         return True
     else:
         return False
+
+
+def _is_new_type(t: Any) -> bool:
+    return hasattr(t, '__supertype__')

tests/test_simple.py

@@ -308,3 +308,31 @@ class Foo:
 
     assert serializer.dump(Foo(bar=1)) == {'bar': 1}
     assert serializer.dump(Foo(bar='2')) == {'bar': '2'}
+
+
+def test_load_new_type():
+    from typing import NewType
+
+    Foo = NewType('Foo', int)
+
+    @dataclass
+    class Bar:
+        foo: Foo
+
+    serializer = Serializer(Bar)
+
+    assert serializer.load({'foo': 1}) == Bar(foo=Foo(1))
+
+
+def test_dump_new_type():
+    from typing import NewType
+
+    Foo = NewType('Foo', int)
+
+    @dataclass
+    class Bar:
+        foo: Foo
+
+    serializer = Serializer(Bar)
+
+    assert serializer.dump(Bar(foo=Foo(1))) == {'foo': 1}