from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/optional-list-str")
async def read_optional_list_str(
    p: Annotated[list[str] | None, Query()] = None,
):
    return {"p": p}


class QueryModelOptionalListStr(BaseModel):
    p: list[str] | None = None


@app.get("/model-optional-list-str")

from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/optional-list-str")
async def read_optional_list_str(
    p: Annotated[list[str] | None, Header()] = None,
):
    return {"p": p}


class HeaderModelOptionalListStr(BaseModel):
    p: list[str] | None = None


@app.get("/model-optional-list-str")