From 04703fd64388d2cde70fd8bab68fb35be7af27e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Sat, 7 Feb 2026 09:19:33 +0100
Subject: [PATCH] =?UTF-8?q?=E2=99=BB=EF=B8=8F=20Refactor=20ModelField.requ?=
 =?UTF-8?q?ired,=20use=20FieldInfo=20internals?=
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---
 fastapi/_compat/v2.py         | 4 ----
 fastapi/dependencies/utils.py | 8 +++++---
 fastapi/openapi/utils.py      | 4 ++--
 3 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/fastapi/_compat/v2.py b/fastapi/_compat/v2.py
index 3245f75fe..cd0481eff 100644
--- a/fastapi/_compat/v2.py
+++ b/fastapi/_compat/v2.py
@@ -102,10 +102,6 @@ class ModelField:
         sa = self.field_info.serialization_alias
         return sa or None
 
-    @property
-    def required(self) -> bool:
-        return self.field_info.is_required()
-
     @property
     def default(self) -> Any:
         return self.get_default()
diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index ae89c8b6f..b84bbf863 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -710,7 +710,7 @@ def _validate_value_with_model_field(
     *, field: ModelField, value: Any, values: dict[str, Any], loc: tuple[str, ...]
 ) -> tuple[Any, list[Any]]:
     if value is None:
-        if field.required:
+        if field.field_info.is_required():
             return None, [get_missing_field_error(loc=loc)]
         else:
             return deepcopy(field.default), []
@@ -742,7 +742,7 @@ def _get_multidict_value(
         )
         or (is_sequence_field(field) and len(value) == 0)
     ):
-        if field.required:
+        if field.field_info.is_required():
             return
         else:
             return deepcopy(field.default)
@@ -996,7 +996,9 @@ def get_body_field(
     BodyModel = create_body_model(
         fields=flat_dependant.body_params, model_name=model_name
     )
-    required = any(True for f in flat_dependant.body_params if f.required)
+    required = any(
+        True for f in flat_dependant.body_params if f.field_info.is_required()
+    )
     BodyFieldInfo_kwargs: dict[str, Any] = {
         "annotation": BodyModel,
         "alias": "body",
diff --git a/fastapi/openapi/utils.py b/fastapi/openapi/utils.py
index 0f6cf8e3a..bcad0be75 100644
--- a/fastapi/openapi/utils.py
+++ b/fastapi/openapi/utils.py
@@ -161,7 +161,7 @@ def _get_openapi_operation_parameters(
             parameter = {
                 "name": name,
                 "in": param_type.value,
-                "required": param.required,
+                "required": param.field_info.is_required(),
                 "schema": param_schema,
             }
             if field_info.description:
@@ -198,7 +198,7 @@ def get_openapi_operation_request_body(
     )
     field_info = cast(Body, body_field.field_info)
     request_media_type = field_info.media_type
-    required = body_field.required
+    required = body_field.field_info.is_required()
     request_body_oai: dict[str, Any] = {}
     if required:
         request_body_oai["required"] = required