Merge branch 'master' into fix-duplicate-special-dependency-handling

docs/de/docs/project-generation.md

@@ -14,7 +14,7 @@ GitHub-Repository: <a href="https://github.com/tiangolo/full-stack-fastapi-templ
     - 💾 [PostgreSQL](https://www.postgresql.org) als SQL-Datenbank.
 - 🚀 [React](https://react.dev) für das Frontend.
     - 💃 Verwendung von TypeScript, Hooks, [Vite](https://vitejs.dev) und anderen Teilen eines modernen Frontend-Stacks.
-    - 🎨 [Chakra UI](https://chakra-ui.com) für die Frontend-Komponenten.
+    - 🎨 [Tailwind CSS](https://tailwindcss.com) und [shadcn/ui](https://ui.shadcn.com) für die Frontend-Komponenten.
     - 🤖 Ein automatisch generierter Frontend-Client.
     - 🧪 [Playwright](https://playwright.dev) für End-to-End-Tests.
     - 🦇 Unterstützung des Dunkelmodus.

docs/en/docs/project-generation.md

@@ -9,18 +9,18 @@ GitHub Repository: <a href="https://github.com/tiangolo/full-stack-fastapi-templ
 ## Full Stack FastAPI Template - Technology Stack and Features { #full-stack-fastapi-template-technology-stack-and-features }
 
 - ⚡ [**FastAPI**](https://fastapi.tiangolo.com) for the Python backend API.
-    - 🧰 [SQLModel](https://sqlmodel.tiangolo.com) for the Python SQL database interactions (ORM).
+  - 🧰 [SQLModel](https://sqlmodel.tiangolo.com) for the Python SQL database interactions (ORM).
-    - 🔍 [Pydantic](https://docs.pydantic.dev), used by FastAPI, for the data validation and settings management.
+  - 🔍 [Pydantic](https://docs.pydantic.dev), used by FastAPI, for the data validation and settings management.
-    - 💾 [PostgreSQL](https://www.postgresql.org) as the SQL database.
+  - 💾 [PostgreSQL](https://www.postgresql.org) as the SQL database.
 - 🚀 [React](https://react.dev) for the frontend.
-    - 💃 Using TypeScript, hooks, [Vite](https://vitejs.dev), and other parts of a modern frontend stack.
+  - 💃 Using TypeScript, hooks, Vite, and other parts of a modern frontend stack.
-    - 🎨 [Chakra UI](https://chakra-ui.com) for the frontend components.
+  - 🎨 [Tailwind CSS](https://tailwindcss.com) and [shadcn/ui](https://ui.shadcn.com) for the frontend components.
-    - 🤖 An automatically generated frontend client.
+  - 🤖 An automatically generated frontend client.
-    - 🧪 [Playwright](https://playwright.dev) for End-to-End testing.
+  - 🧪 [Playwright](https://playwright.dev) for End-to-End testing.
-    - 🦇 Dark mode support.
+  - 🦇 Dark mode support.
 - 🐋 [Docker Compose](https://www.docker.com) for development and production.
 - 🔒 Secure password hashing by default.
-- 🔑 JWT token authentication.
+- 🔑 JWT (JSON Web Token) authentication.
 - 📫 Email based password recovery.
 - ✅ Tests with [Pytest](https://pytest.org).
 - 📞 [Traefik](https://traefik.io) as a reverse proxy / load balancer.

docs/en/docs/release-notes.md

@@ -7,6 +7,27 @@ hide:
 
 ## Latest Changes
 
+### Docs
+
+* 📝 Update tech stack in project generation docs. PR [#14472](https://github.com/fastapi/fastapi/pull/14472) by [@alejsdev](https://github.com/alejsdev).
+
+## 0.124.0
+
+### Features
+
+* 🚸  Improve tracebacks by adding endpoint metadata. PR [#14306](https://github.com/fastapi/fastapi/pull/14306) by [@savannahostrowski](https://github.com/savannahostrowski).
+
+### Internal
+
+* ✏️ Fix typo in `scripts/mkdocs_hooks.py`. PR [#14457](https://github.com/fastapi/fastapi/pull/14457) by [@yujiteshima](https://github.com/yujiteshima).
+
+## 0.123.10
+
+### Fixes
+
+* 🐛 Fix using class (not instance) dependency that has `__call__` method. PR [#14458](https://github.com/fastapi/fastapi/pull/14458) by [@YuriiMotov](https://github.com/YuriiMotov).
+* 🐛 Fix `separate_input_output_schemas=False` with `computed_field`. PR [#14453](https://github.com/fastapi/fastapi/pull/14453) by [@YuriiMotov](https://github.com/YuriiMotov).
+
 ## 0.123.9
 
 ### Fixes

docs/pt/docs/project-generation.md

@@ -14,7 +14,7 @@ Repositório GitHub: <a href="https://github.com/tiangolo/full-stack-fastapi-tem
     - 💾 [PostgreSQL](https://www.postgresql.org) como banco de dados SQL.
 - 🚀 [React](https://react.dev) para o frontend.
     - 💃 Usando TypeScript, hooks, [Vite](https://vitejs.dev), e outras partes de uma _stack_ frontend moderna.
-    - 🎨 [Chakra UI](https://chakra-ui.com) para os componentes de frontend.
+    - 🎨 [Tailwind CSS](https://tailwindcss.com) e [shadcn/ui](https://ui.shadcn.com) para os componentes de frontend.
     - 🤖 Um cliente frontend automaticamente gerado.
     - 🧪 [Playwright](https://playwright.dev) para testes Ponta-a-Ponta.
     - 🦇 Suporte para modo escuro.

fastapi/__init__.py

@@ -1,6 +1,6 @@
 """FastAPI framework, high performance, easy to learn, fast to code, ready for production"""
 
-__version__ = "0.123.9"
+__version__ = "0.124.0"
 
 from starlette import status as status
 

fastapi/_compat/v2.py

@@ -171,6 +171,13 @@ def _get_model_config(model: BaseModel) -> Any:
     return model.model_config
 
 
+def _has_computed_fields(field: ModelField) -> bool:
+    computed_fields = field._type_adapter.core_schema.get("schema", {}).get(
+        "computed_fields", []
+    )
+    return len(computed_fields) > 0
+
+
 def get_schema_from_model_field(
     *,
     field: ModelField,
@@ -180,12 +187,9 @@ def get_schema_from_model_field(
     ],
     separate_input_output_schemas: bool = True,
 ) -> Dict[str, Any]:
-    computed_fields = field._type_adapter.core_schema.get("schema", {}).get(
-        "computed_fields", []
-    )
     override_mode: Union[Literal["validation"], None] = (
         None
-        if (separate_input_output_schemas or len(computed_fields) > 0)
+        if (separate_input_output_schemas or _has_computed_fields(field))
         else "validation"
     )
     # This expects that GenerateJsonSchema was already used to generate the definitions
@@ -208,15 +212,7 @@ def get_definitions(
     Dict[Tuple[ModelField, Literal["validation", "serialization"]], JsonSchemaValue],
     Dict[str, Dict[str, Any]],
 ]:
-    has_computed_fields: bool = any(
-        field._type_adapter.core_schema.get("schema", {}).get("computed_fields", [])
-        for field in fields
-    )
-
     schema_generator = GenerateJsonSchema(ref_template=REF_TEMPLATE)
-    override_mode: Union[Literal["validation"], None] = (
-        None if (separate_input_output_schemas or has_computed_fields) else "validation"
-    )
     validation_fields = [field for field in fields if field.mode == "validation"]
     serialization_fields = [field for field in fields if field.mode == "serialization"]
     flat_validation_models = get_flat_models_from_fields(
@@ -246,9 +242,16 @@ def get_definitions(
     unique_flat_model_fields = {
         f for f in flat_model_fields if f.type_ not in input_types
     }
-
     inputs = [
-        (field, override_mode or field.mode, field._type_adapter.core_schema)
+        (
+            field,
+            (
+                field.mode
+                if (separate_input_output_schemas or _has_computed_fields(field))
+                else "validation"
+            ),
+            field._type_adapter.core_schema,
+        )
         for field in list(fields) + list(unique_flat_model_fields)
     ]
     field_mapping, definitions = schema_generator.generate_definitions(inputs=inputs)

fastapi/dependencies/models.py

@@ -110,6 +110,8 @@ class Dependant:
             _impartial(self.call)
         ) or inspect.isgeneratorfunction(_unwrapped_call(self.call)):
             return True
+        if inspect.isclass(_unwrapped_call(self.call)):
+            return False
         dunder_call = getattr(_impartial(self.call), "__call__", None)  # noqa: B004
         if dunder_call is None:
             return False  # pragma: no cover
@@ -134,6 +136,8 @@ class Dependant:
             _impartial(self.call)
         ) or inspect.isasyncgenfunction(_unwrapped_call(self.call)):
             return True
+        if inspect.isclass(_unwrapped_call(self.call)):
+            return False
         dunder_call = getattr(_impartial(self.call), "__call__", None)  # noqa: B004
         if dunder_call is None:
             return False  # pragma: no cover
@@ -162,6 +166,8 @@ class Dependant:
             _unwrapped_call(self.call)
         ):
             return True
+        if inspect.isclass(_unwrapped_call(self.call)):
+            return False
         dunder_call = getattr(_impartial(self.call), "__call__", None)  # noqa: B004
         if dunder_call is None:
             return False  # pragma: no cover
@@ -176,7 +182,6 @@ class Dependant:
             _impartial(dunder_unwrapped_call)
         ) or iscoroutinefunction(_unwrapped_call(dunder_unwrapped_call)):
             return True
-        # if inspect.isclass(self.call): False, covered by default return
         return False
 
     @cached_property

fastapi/exceptions.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, Optional, Sequence, Type, Union
+from typing import Any, Dict, Optional, Sequence, Type, TypedDict, Union
 
 from annotated_doc import Doc
 from pydantic import BaseModel, create_model
@@ -7,6 +7,13 @@ from starlette.exceptions import WebSocketException as StarletteWebSocketExcepti
 from typing_extensions import Annotated
 
 
+class EndpointContext(TypedDict, total=False):
+    function: str
+    path: str
+    file: str
+    line: int
+
+
 class HTTPException(StarletteHTTPException):
     """
     An HTTP exception you can raise in your own code to show errors to the client.
@@ -155,30 +162,72 @@ class DependencyScopeError(FastAPIError):
 
 
 class ValidationException(Exception):
-    def __init__(self, errors: Sequence[Any]) -> None:
+    def __init__(
+        self,
+        errors: Sequence[Any],
+        *,
+        endpoint_ctx: Optional[EndpointContext] = None,
+    ) -> None:
         self._errors = errors
+        self.endpoint_ctx = endpoint_ctx
+
+        ctx = endpoint_ctx or {}
+        self.endpoint_function = ctx.get("function")
+        self.endpoint_path = ctx.get("path")
+        self.endpoint_file = ctx.get("file")
+        self.endpoint_line = ctx.get("line")
 
     def errors(self) -> Sequence[Any]:
         return self._errors
 
+    def _format_endpoint_context(self) -> str:
+        if not (self.endpoint_file and self.endpoint_line and self.endpoint_function):
+            if self.endpoint_path:
+                return f"\n  Endpoint: {self.endpoint_path}"
+            return ""
+
+        context = f'\n  File "{self.endpoint_file}", line {self.endpoint_line}, in {self.endpoint_function}'
+        if self.endpoint_path:
+            context += f"\n    {self.endpoint_path}"
+        return context
+
+    def __str__(self) -> str:
+        message = f"{len(self._errors)} validation error{'s' if len(self._errors) != 1 else ''}:\n"
+        for err in self._errors:
+            message += f"  {err}\n"
+        message += self._format_endpoint_context()
+        return message.rstrip()
+
 
 class RequestValidationError(ValidationException):
-    def __init__(self, errors: Sequence[Any], *, body: Any = None) -> None:
+    def __init__(
-        super().__init__(errors)
+        self,
+        errors: Sequence[Any],
+        *,
+        body: Any = None,
+        endpoint_ctx: Optional[EndpointContext] = None,
+    ) -> None:
+        super().__init__(errors, endpoint_ctx=endpoint_ctx)
         self.body = body
 
 
 class WebSocketRequestValidationError(ValidationException):
-    pass
+    def __init__(
+        self,
+        errors: Sequence[Any],
+        *,
+        endpoint_ctx: Optional[EndpointContext] = None,
+    ) -> None:
+        super().__init__(errors, endpoint_ctx=endpoint_ctx)
 
 
 class ResponseValidationError(ValidationException):
-    def __init__(self, errors: Sequence[Any], *, body: Any = None) -> None:
+    def __init__(
-        super().__init__(errors)
+        self,
+        errors: Sequence[Any],
+        *,
+        body: Any = None,
+        endpoint_ctx: Optional[EndpointContext] = None,
+    ) -> None:
+        super().__init__(errors, endpoint_ctx=endpoint_ctx)
         self.body = body
-
-    def __str__(self) -> str:
-        message = f"{len(self._errors)} validation errors:\n"
-        for err in self._errors:
-            message += f"  {err}\n"
-        return message

fastapi/routing.py

@@ -46,6 +46,7 @@ from fastapi.dependencies.utils import (
 )
 from fastapi.encoders import jsonable_encoder
 from fastapi.exceptions import (
+    EndpointContext,
     FastAPIError,
     RequestValidationError,
     ResponseValidationError,
@@ -212,6 +213,33 @@ def _merge_lifespan_context(
     return merged_lifespan  # type: ignore[return-value]
 
 
+# Cache for endpoint context to avoid re-extracting on every request
+_endpoint_context_cache: Dict[int, EndpointContext] = {}
+
+
+def _extract_endpoint_context(func: Any) -> EndpointContext:
+    """Extract endpoint context with caching to avoid repeated file I/O."""
+    func_id = id(func)
+
+    if func_id in _endpoint_context_cache:
+        return _endpoint_context_cache[func_id]
+
+    try:
+        ctx: EndpointContext = {}
+
+        if (source_file := inspect.getsourcefile(func)) is not None:
+            ctx["file"] = source_file
+        if (line_number := inspect.getsourcelines(func)[1]) is not None:
+            ctx["line"] = line_number
+        if (func_name := getattr(func, "__name__", None)) is not None:
+            ctx["function"] = func_name
+    except Exception:
+        ctx = EndpointContext()
+
+    _endpoint_context_cache[func_id] = ctx
+    return ctx
+
+
 async def serialize_response(
     *,
     field: Optional[ModelField] = None,
@@ -223,6 +251,7 @@ async def serialize_response(
     exclude_defaults: bool = False,
     exclude_none: bool = False,
     is_coroutine: bool = True,
+    endpoint_ctx: Optional[EndpointContext] = None,
 ) -> Any:
     if field:
         errors = []
@@ -245,8 +274,11 @@ async def serialize_response(
         elif errors_:
             errors.append(errors_)
         if errors:
+            ctx = endpoint_ctx or EndpointContext()
             raise ResponseValidationError(
-                errors=_normalize_errors(errors), body=response_content
+                errors=_normalize_errors(errors),
+                body=response_content,
+                endpoint_ctx=ctx,
             )
 
         if hasattr(field, "serialize"):
@@ -318,6 +350,18 @@ def get_request_handler(
             "fastapi_middleware_astack not found in request scope"
         )
 
+        # Extract endpoint context for error messages
+        endpoint_ctx = (
+            _extract_endpoint_context(dependant.call)
+            if dependant.call
+            else EndpointContext()
+        )
+
+        if dependant.path:
+            # For mounted sub-apps, include the mount path prefix
+            mount_path = request.scope.get("root_path", "").rstrip("/")
+            endpoint_ctx["path"] = f"{request.method} {mount_path}{dependant.path}"
+
         # Read body and auto-close files
         try:
             body: Any = None
@@ -355,6 +399,7 @@ def get_request_handler(
                     }
                 ],
                 body=e.doc,
+                endpoint_ctx=endpoint_ctx,
             )
             raise validation_error from e
         except HTTPException:
@@ -414,6 +459,7 @@ def get_request_handler(
                     exclude_defaults=response_model_exclude_defaults,
                     exclude_none=response_model_exclude_none,
                     is_coroutine=is_coroutine,
+                    endpoint_ctx=endpoint_ctx,
                 )
                 response = actual_response_class(content, **response_args)
                 if not is_body_allowed_for_status_code(response.status_code):
@@ -421,7 +467,7 @@ def get_request_handler(
                 response.headers.raw.extend(solved_result.response.headers.raw)
         if errors:
             validation_error = RequestValidationError(
-                _normalize_errors(errors), body=body
+                _normalize_errors(errors), body=body, endpoint_ctx=endpoint_ctx
             )
             raise validation_error
 
@@ -438,6 +484,15 @@ def get_websocket_app(
     embed_body_fields: bool = False,
 ) -> Callable[[WebSocket], Coroutine[Any, Any, Any]]:
     async def app(websocket: WebSocket) -> None:
+        endpoint_ctx = (
+            _extract_endpoint_context(dependant.call)
+            if dependant.call
+            else EndpointContext()
+        )
+        if dependant.path:
+            # For mounted sub-apps, include the mount path prefix
+            mount_path = websocket.scope.get("root_path", "").rstrip("/")
+            endpoint_ctx["path"] = f"WS {mount_path}{dependant.path}"
         async_exit_stack = websocket.scope.get("fastapi_inner_astack")
         assert isinstance(async_exit_stack, AsyncExitStack), (
             "fastapi_inner_astack not found in request scope"
@@ -451,7 +506,8 @@ def get_websocket_app(
         )
         if solved_result.errors:
             raise WebSocketRequestValidationError(
-                _normalize_errors(solved_result.errors)
+                _normalize_errors(solved_result.errors),
+                endpoint_ctx=endpoint_ctx,
             )
         assert dependant.call is not None, "dependant.call must be a function"
         await dependant.call(**solved_result.values)

scripts/mkdocs_hooks.py

@@ -132,7 +132,7 @@ def on_pre_page(page: Page, *, config: MkDocsConfig, files: Files) -> Page:
 def on_page_markdown(
     markdown: str, *, page: Page, config: MkDocsConfig, files: Files
 ) -> str:
-    # Set matadata["social"]["cards_layout_options"]["title"] to clean title (without
+    # Set metadata["social"]["cards_layout_options"]["title"] to clean title (without
     # permalink)
     title = page.title
     clean_title = title.split("{ #")[0]

tests/test_dependency_class.py

@@ -48,6 +48,34 @@ async_callable_gen_dependency = AsyncCallableGenDependency()
 methods_dependency = MethodsDependency()
 
 
+@app.get("/callable-dependency-class")
+async def get_callable_dependency_class(
+    value: str, instance: CallableDependency = Depends()
+):
+    return instance(value)
+
+
+@app.get("/callable-gen-dependency-class")
+async def get_callable_gen_dependency_class(
+    value: str, instance: CallableGenDependency = Depends()
+):
+    return next(instance(value))
+
+
+@app.get("/async-callable-dependency-class")
+async def get_async_callable_dependency_class(
+    value: str, instance: AsyncCallableDependency = Depends()
+):
+    return await instance(value)
+
+
+@app.get("/async-callable-gen-dependency-class")
+async def get_async_callable_gen_dependency_class(
+    value: str, instance: AsyncCallableGenDependency = Depends()
+):
+    return await instance(value).__anext__()
+
+
 @app.get("/callable-dependency")
 async def get_callable_dependency(value: str = Depends(callable_dependency)):
     return value
@@ -114,6 +142,10 @@ client = TestClient(app)
         ("/synchronous-method-gen-dependency", "synchronous-method-gen-dependency"),
         ("/asynchronous-method-dependency", "asynchronous-method-dependency"),
         ("/asynchronous-method-gen-dependency", "asynchronous-method-gen-dependency"),
+        ("/callable-dependency-class", "callable-dependency-class"),
+        ("/callable-gen-dependency-class", "callable-gen-dependency-class"),
+        ("/async-callable-dependency-class", "async-callable-dependency-class"),
+        ("/async-callable-gen-dependency-class", "async-callable-gen-dependency-class"),
     ],
 )
 def test_class_dependency(route, value):

tests/test_openapi_separate_input_output_schemas.py

@@ -24,6 +24,18 @@ class Item(BaseModel):
         model_config = {"json_schema_serialization_defaults_required": True}
 
 
+if PYDANTIC_V2:
+    from pydantic import computed_field
+
+    class WithComputedField(BaseModel):
+        name: str
+
+        @computed_field
+        @property
+        def computed_field(self) -> str:
+            return f"computed {self.name}"
+
+
 def get_app_client(separate_input_output_schemas: bool = True) -> TestClient:
     app = FastAPI(separate_input_output_schemas=separate_input_output_schemas)
 
@@ -46,6 +58,14 @@ def get_app_client(separate_input_output_schemas: bool = True) -> TestClient:
             Item(name="Plumbus"),
         ]
 
+    if PYDANTIC_V2:
+
+        @app.post("/with-computed-field/")
+        def create_with_computed_field(
+            with_computed_field: WithComputedField,
+        ) -> WithComputedField:
+            return with_computed_field
+
     client = TestClient(app)
     return client
 
@@ -131,6 +151,23 @@ def test_read_items():
     )
 
 
+@needs_pydanticv2
+def test_with_computed_field():
+    client = get_app_client()
+    client_no = get_app_client(separate_input_output_schemas=False)
+    response = client.post("/with-computed-field/", json={"name": "example"})
+    response2 = client_no.post("/with-computed-field/", json={"name": "example"})
+    assert response.status_code == response2.status_code == 200, response.text
+    assert (
+        response.json()
+        == response2.json()
+        == {
+            "name": "example",
+            "computed_field": "computed example",
+        }
+    )
+
+
 @needs_pydanticv2
 def test_openapi_schema():
     client = get_app_client()
@@ -245,6 +282,44 @@ def test_openapi_schema():
                         },
                     }
                 },
+                "/with-computed-field/": {
+                    "post": {
+                        "summary": "Create With Computed Field",
+                        "operationId": "create_with_computed_field_with_computed_field__post",
+                        "requestBody": {
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "$ref": "#/components/schemas/WithComputedField-Input"
+                                    }
+                                }
+                            },
+                            "required": True,
+                        },
+                        "responses": {
+                            "200": {
+                                "description": "Successful Response",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/WithComputedField-Output"
+                                        }
+                                    }
+                                },
+                            },
+                            "422": {
+                                "description": "Validation Error",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/HTTPValidationError"
+                                        }
+                                    }
+                                },
+                            },
+                        },
+                    },
+                },
             },
             "components": {
                 "schemas": {
@@ -333,6 +408,25 @@ def test_openapi_schema():
                         "required": ["subname", "sub_description", "tags"],
                         "title": "SubItem",
                     },
+                    "WithComputedField-Input": {
+                        "properties": {"name": {"type": "string", "title": "Name"}},
+                        "type": "object",
+                        "required": ["name"],
+                        "title": "WithComputedField",
+                    },
+                    "WithComputedField-Output": {
+                        "properties": {
+                            "name": {"type": "string", "title": "Name"},
+                            "computed_field": {
+                                "type": "string",
+                                "title": "Computed Field",
+                                "readOnly": True,
+                            },
+                        },
+                        "type": "object",
+                        "required": ["name", "computed_field"],
+                        "title": "WithComputedField",
+                    },
                     "ValidationError": {
                         "properties": {
                             "loc": {
@@ -458,6 +552,44 @@ def test_openapi_schema_no_separate():
                     },
                 }
             },
+            "/with-computed-field/": {
+                "post": {
+                    "summary": "Create With Computed Field",
+                    "operationId": "create_with_computed_field_with_computed_field__post",
+                    "requestBody": {
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "$ref": "#/components/schemas/WithComputedField-Input"
+                                }
+                            }
+                        },
+                        "required": True,
+                    },
+                    "responses": {
+                        "200": {
+                            "description": "Successful Response",
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "$ref": "#/components/schemas/WithComputedField-Output"
+                                    }
+                                }
+                            },
+                        },
+                        "422": {
+                            "description": "Validation Error",
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "$ref": "#/components/schemas/HTTPValidationError"
+                                    }
+                                }
+                            },
+                        },
+                    },
+                },
+            },
         },
         "components": {
             "schemas": {
@@ -508,6 +640,25 @@ def test_openapi_schema_no_separate():
                     "required": ["subname"],
                     "title": "SubItem",
                 },
+                "WithComputedField-Input": {
+                    "properties": {"name": {"type": "string", "title": "Name"}},
+                    "type": "object",
+                    "required": ["name"],
+                    "title": "WithComputedField",
+                },
+                "WithComputedField-Output": {
+                    "properties": {
+                        "name": {"type": "string", "title": "Name"},
+                        "computed_field": {
+                            "type": "string",
+                            "title": "Computed Field",
+                            "readOnly": True,
+                        },
+                    },
+                    "type": "object",
+                    "required": ["name", "computed_field"],
+                    "title": "WithComputedField",
+                },
                 "ValidationError": {
                     "properties": {
                         "loc": {

tests/test_validation_error_context.py

@@ -0,0 +1,168 @@
+from fastapi import FastAPI, Request, WebSocket
+from fastapi.exceptions import (
+    RequestValidationError,
+    ResponseValidationError,
+    WebSocketRequestValidationError,
+)
+from fastapi.testclient import TestClient
+from pydantic import BaseModel
+
+
+class Item(BaseModel):
+    id: int
+    name: str
+
+
+class ExceptionCapture:
+    def __init__(self):
+        self.exception = None
+
+    def capture(self, exc):
+        self.exception = exc
+        return exc
+
+
+app = FastAPI()
+sub_app = FastAPI()
+captured_exception = ExceptionCapture()
+
+app.mount(path="/sub", app=sub_app)
+
+
+@app.exception_handler(RequestValidationError)
+@sub_app.exception_handler(RequestValidationError)
+async def request_validation_handler(request: Request, exc: RequestValidationError):
+    captured_exception.capture(exc)
+    raise exc
+
+
+@app.exception_handler(ResponseValidationError)
+@sub_app.exception_handler(ResponseValidationError)
+async def response_validation_handler(_: Request, exc: ResponseValidationError):
+    captured_exception.capture(exc)
+    raise exc
+
+
+@app.exception_handler(WebSocketRequestValidationError)
+@sub_app.exception_handler(WebSocketRequestValidationError)
+async def websocket_validation_handler(
+    websocket: WebSocket, exc: WebSocketRequestValidationError
+):
+    captured_exception.capture(exc)
+    raise exc
+
+
+@app.get("/users/{user_id}")
+def get_user(user_id: int):
+    return {"user_id": user_id}  # pragma: no cover
+
+
+@app.get("/items/", response_model=Item)
+def get_item():
+    return {"name": "Widget"}
+
+
+@sub_app.get("/items/", response_model=Item)
+def get_sub_item():
+    return {"name": "Widget"}  # pragma: no cover
+
+
+@app.websocket("/ws/{item_id}")
+async def websocket_endpoint(websocket: WebSocket, item_id: int):
+    await websocket.accept()  # pragma: no cover
+    await websocket.send_text(f"Item: {item_id}")  # pragma: no cover
+    await websocket.close()  # pragma: no cover
+
+
+@sub_app.websocket("/ws/{item_id}")
+async def subapp_websocket_endpoint(websocket: WebSocket, item_id: int):
+    await websocket.accept()  # pragma: no cover
+    await websocket.send_text(f"Item: {item_id}")  # pragma: no cover
+    await websocket.close()  # pragma: no cover
+
+
+client = TestClient(app)
+
+
+def test_request_validation_error_includes_endpoint_context():
+    captured_exception.exception = None
+    try:
+        client.get("/users/invalid")
+    except Exception:
+        pass
+
+    assert captured_exception.exception is not None
+    error_str = str(captured_exception.exception)
+    assert "get_user" in error_str
+    assert "/users/" in error_str
+
+
+def test_response_validation_error_includes_endpoint_context():
+    captured_exception.exception = None
+    try:
+        client.get("/items/")
+    except Exception:
+        pass
+
+    assert captured_exception.exception is not None
+    error_str = str(captured_exception.exception)
+    assert "get_item" in error_str
+    assert "/items/" in error_str
+
+
+def test_websocket_validation_error_includes_endpoint_context():
+    captured_exception.exception = None
+    try:
+        with client.websocket_connect("/ws/invalid"):
+            pass  # pragma: no cover
+    except Exception:
+        pass
+
+    assert captured_exception.exception is not None
+    error_str = str(captured_exception.exception)
+    assert "websocket_endpoint" in error_str
+    assert "/ws/" in error_str
+
+
+def test_subapp_request_validation_error_includes_endpoint_context():
+    captured_exception.exception = None
+    try:
+        client.get("/sub/items/")
+    except Exception:
+        pass
+
+    assert captured_exception.exception is not None
+    error_str = str(captured_exception.exception)
+    assert "get_sub_item" in error_str
+    assert "/sub/items/" in error_str
+
+
+def test_subapp_websocket_validation_error_includes_endpoint_context():
+    captured_exception.exception = None
+    try:
+        with client.websocket_connect("/sub/ws/invalid"):
+            pass  # pragma: no cover
+    except Exception:
+        pass
+
+    assert captured_exception.exception is not None
+    error_str = str(captured_exception.exception)
+    assert "subapp_websocket_endpoint" in error_str
+    assert "/sub/ws/" in error_str
+
+
+def test_validation_error_with_only_path():
+    errors = [{"type": "missing", "loc": ("body", "name"), "msg": "Field required"}]
+    exc = RequestValidationError(errors, endpoint_ctx={"path": "GET /api/test"})
+    error_str = str(exc)
+    assert "Endpoint: GET /api/test" in error_str
+    assert 'File "' not in error_str
+
+
+def test_validation_error_with_no_context():
+    errors = [{"type": "missing", "loc": ("body", "name"), "msg": "Field required"}]
+    exc = RequestValidationError(errors, endpoint_ctx={})
+    error_str = str(exc)
+    assert "1 validation error:" in error_str
+    assert "Endpoint" not in error_str
+    assert 'File "' not in error_str