):
    return {"p": p}


class FormModelOptionalAlias(BaseModel):
    p: Optional[str] = Field(None, alias="p_alias")


@app.post("/model-optional-alias", operation_id="model_optional_alias")
async def read_model_optional_alias(p: Annotated[FormModelOptionalAlias, Form()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    [
        "/optional-alias",
        "/model-optional-alias",
    ],
)

):
    return {"p": p}


class HeaderModelOptionalAlias(BaseModel):
    p: Optional[str] = Field(None, alias="p_alias")


@app.get("/model-optional-alias")
async def read_model_optional_alias(p: Annotated[HeaderModelOptionalAlias, Header()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-alias", "/model-optional-alias"],
)

):
    return {"p": p}


class CookieModelOptionalAlias(BaseModel):
    p: Optional[str] = Field(None, alias="p_alias")


@app.get("/model-optional-alias")
async def read_model_optional_alias(p: Annotated[CookieModelOptionalAlias, Cookie()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-alias", "/model-optional-alias"],
)

):
    return {"p": p}


class QueryModelOptionalAlias(BaseModel):
    p: Optional[str] = Field(None, alias="p_alias")


@app.get("/model-optional-alias")
async def read_model_optional_alias(p: Annotated[QueryModelOptionalAlias, Query()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-alias", "/model-optional-alias"],
)

class BodyModelOptionalAlias(BaseModel):
    p: Optional[str] = Field(None, alias="p_alias")


@app.post("/model-optional-alias", operation_id="model_optional_alias")
async def read_model_optional_alias(p: BodyModelOptionalAlias):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    [
        "/optional-alias",
        "/model-optional-alias",
    ],
)