Fix coerce in Hint (#251)

* Fix nullable type null value being converted

* Unpin setuptools version

* Update test

* make format

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools<60.0", "wheel"]
+requires = ["setuptools", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.ruff]

sanic_ext/exceptions.py

@@ -5,9 +5,7 @@ class ValidationError(SanicException):
     status_code = 400
 
 
-class InitError(SanicException):
-    ...
+class InitError(SanicException): ...
 
 
-class ExtensionNotFound(SanicException):
-    ...
+class ExtensionNotFound(SanicException): ...

sanic_ext/extensions/base.py

@@ -46,8 +46,7 @@ def _startup(self, bootstrap):
         self._started = True
 
     @abstractmethod
-    def startup(self, bootstrap) -> None:
-        ...
+    def startup(self, bootstrap) -> None: ...
 
     def label(self):
         return ""

sanic_ext/extensions/health/monitor.py

@@ -17,8 +17,7 @@
     from sanic import Sanic
 
 
-class Stale(ValueError):
-    ...
+class Stale(ValueError): ...
 
 
 @dataclass

sanic_ext/extensions/openapi/blueprint.py

@@ -173,9 +173,9 @@ def build_spec(app, loop):
                 ):
                     operation.autodoc(docstring)
 
-                operation._default[
-                    "operationId"
-                ] = f"{method.lower()}~{route_name}"
+                operation._default["operationId"] = (
+                    f"{method.lower()}~{route_name}"
+                )
                 operation._default["summary"] = clean_route_name(route_name)
 
                 if host:

sanic_ext/extensions/openapi/definitions.py

@@ -4,6 +4,7 @@
 I.e., the objects described https://swagger.io/docs/specification
 
 """
+
 from __future__ import annotations
 
 from inspect import isclass

sanic_ext/extensions/openapi/openapi.py

@@ -3,6 +3,7 @@
 documentation to OperationStore() and components created in the blueprints.
 
 """
+
 from functools import wraps
 from inspect import isawaitable, isclass
 from typing import (
@@ -94,13 +95,11 @@ def _content_or_component(content):
 
 
 @overload
-def exclude(flag: bool = True, *, bp: Blueprint) -> None:
-    ...
+def exclude(flag: bool = True, *, bp: Blueprint) -> None: ...
 
 
 @overload
-def exclude(flag: bool = True) -> Callable:
-    ...
+def exclude(flag: bool = True) -> Callable: ...
 
 
 def exclude(flag: bool = True, *, bp: Optional[Blueprint] = None):
@@ -247,8 +246,7 @@ def parameter(
     *,
     parameter: definitions.Parameter,
     **kwargs,
-) -> Callable[[T], T]:
-    ...
+) -> Callable[[T], T]: ...
 
 
 @overload
@@ -258,8 +256,7 @@ def parameter(
     location: None,
     parameter: definitions.Parameter,
     **kwargs,
-) -> Callable[[T], T]:
-    ...
+) -> Callable[[T], T]: ...
 
 
 @overload
@@ -269,8 +266,7 @@ def parameter(
     location: Optional[str] = None,
     parameter: None = None,
     **kwargs,
-) -> Callable[[T], T]:
-    ...
+) -> Callable[[T], T]: ...
 
 
 def parameter(

sanic_ext/extensions/templating/render.py

@@ -16,8 +16,7 @@
     from jinja2 import Environment
 
 
-class TemplateResponse(HTTPResponse):
-    ...
+class TemplateResponse(HTTPResponse): ...
 
 
 class LazyResponse(TemplateResponse):

sanic_ext/extras/validation/check.py

@@ -141,6 +141,8 @@ def coerce(self, value):
             try:
                 if isinstance(value, list):
                     value = [coerce_type(item) for item in value]
+                elif value is None and self.nullable:
+                    value = None
                 else:
                     value = coerce_type(value)
             except (ValueError, TypeError):

tests/extra/test_validation_dataclass.py

@@ -340,6 +340,7 @@ def test_validate_form(app):
     class Pet:
         name: str
         alter_ego: List[str]
+        description: Optional[str] = None
 
     @app.post("/function")
     @validate(form=Pet)
@@ -348,6 +349,7 @@ async def handler(_, body: Pet):
             {
                 "is_pet": isinstance(body, Pet),
                 "pet": {"name": body.name, "alter_ego": body.alter_ego},
+                "description": body.description if body.description else "",
             }
         )
 
@@ -359,18 +361,21 @@ async def post(self, _, body: Pet):
                 {
                     "is_pet": isinstance(body, Pet),
                     "pet": {"name": body.name, "alter_ego": body.alter_ego},
+                    "description": body.description if body.description else "",
                 }
             )
 
     _, response = app.test_client.post("/function", data=SNOOPY_DATA)
     assert response.status == 200
     assert response.json["is_pet"]
     assert response.json["pet"] == SNOOPY_DATA
+    assert response.json["description"] == ""
 
     _, response = app.test_client.post("/method", data=SNOOPY_DATA)
     assert response.status == 200
     assert response.json["is_pet"]
     assert response.json["pet"] == SNOOPY_DATA
+    assert response.json["description"] == ""
 
 
 def test_validate_query(app):