field_mapping: dict[
        tuple[ModelField, Literal["validation", "serialization"]], JsonSchemaValue
    ],
    separate_input_output_schemas: bool = True,
) -> dict[str, Any]:
    override_mode: Union[Literal["validation"], None] = (
        None
        if (separate_input_output_schemas or _has_computed_fields(field))
        else "validation"
    )
    field_alias = (

                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

@app.get("/model-optional-validation-alias")
def read_model_optional_validation_alias(
    p: Annotated[QueryModelOptionalValidationAlias, Query()],
):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-validation-alias", "/model-optional-validation-alias"],
)
def test_optional_validation_alias_schema(path: str):

@app.post(
    "/model-optional-validation-alias", operation_id="model_optional_validation_alias"
)
def read_model_optional_validation_alias(
    p: BodyModelOptionalValidationAlias,
):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-validation-alias", "/model-optional-validation-alias"],
)
def test_optional_validation_alias_schema(path: str):

# Validation alias


@app.get("/required-validation-alias")
def read_required_validation_alias(
    p: Annotated[str, Cookie(validation_alias="p_val_alias")],
):
    return {"p": p}


class CookieModelRequiredValidationAlias(BaseModel):
    p: str = Field(validation_alias="p_val_alias")


@app.get("/model-required-validation-alias")

    * If you didn't use FastAPI and used Starlette directly (or another tool, like Sanic, Flask, Responder, etc) you would have to implement all the data validation and serialization yourself. So, your final application would still have...

# Validation alias


@app.post(
    "/required-bytes-validation-alias", operation_id="required_bytes_validation_alias"
)
def read_required_bytes_validation_alias(
    p: Annotated[bytes, File(validation_alias="p_val_alias")],
):
    return {"file_size": len(p)}


@app.post(
    "/required-uploadfile-validation-alias",

    assert response.json() == {"file_size": 5}


# =====================================================================================
# Validation alias


@app.post(
    "/optional-bytes-validation-alias", operation_id="optional_bytes_validation_alias"
)
def read_optional_bytes_validation_alias(
    p: Annotated[Optional[bytes], File(validation_alias="p_val_alias")] = None,
):

@app.post(
    "/model-optional-validation-alias", operation_id="model_optional_validation_alias"
)
def read_model_optional_validation_alias(
    p: Annotated[FormModelOptionalValidationAlias, Form()],
):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-validation-alias", "/model-optional-validation-alias"],
)
def test_optional_validation_alias_schema(path: str):

@app.get("/model-optional-list-validation-alias")
def read_model_optional_list_validation_alias(
    p: Annotated[QueryModelOptionalListValidationAlias, Query()],
):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-list-validation-alias", "/model-optional-list-validation-alias"],
)
def test_optional_list_validation_alias_schema(path: str):