from typing import List, Union

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: Union[List[str], None] = Query(default=None)):
    query_items = {"q": q}

from typing import Annotated, Union

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: Annotated[Union[list[str], None], Query()] = None):
    query_items = {"q": q}

    // ===================================================================================
    //                                                                               Query
    //                                                                               =====
    public BsBadWordCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsBadWordCQ doGetConditionQuery() {

    //                                                                               Query
    //                                                                               =====
    public BsBoostDocumentRuleCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsBoostDocumentRuleCQ doGetConditionQuery() {

    //                                                                               Query
    //                                                                               =====
    public BsElevateWordCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsElevateWordCQ doGetConditionQuery() {

    //                                                                               Query
    //                                                                               =====
    public BsRequestHeaderCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsRequestHeaderCQ doGetConditionQuery() {

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: str = Query(min_length=3)):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

 * list is a single empty string: `[""]`.
 *
 * ### Query
 *
 * The query is optional: it can be null, empty, or non-empty. For many HTTP URLs the query string
 * is subdivided into a collection of name-value parameters. This class offers methods to set the
 * query as the single string, or as individual name-value parameters. With name-value parameters

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: str | None = Query(default=..., min_length=3)):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

from typing import List, Union

from fastapi import FastAPI, Query
from typing_extensions import Annotated

app = FastAPI()


@app.get("/items/")
async def read_items(q: Annotated[Union[List[str], None], Query()] = None):
    query_items = {"q": q}