{* ../../docs_src/background_tasks/tutorial002_an_py310.py hl[13,15,22,25] *}


In this example, the messages will be written to the `log.txt` file *after* the response is sent.

If there was a query in the request, it will be written to the log in a background task.

And then another background task generated at the *path operation function* will write a message using the `email` path parameter.

from typing import Annotated

import pytest
from fastapi import APIRouter, FastAPI, Query
from fastapi.testclient import TestClient
from inline_snapshot import snapshot

app = FastAPI()


@app.get("/default")
async def default(foo: Annotated[str, Query()] = "foo"):
    return {"foo": foo}


@app.get("/required")
async def required(foo: Annotated[str, Query(min_length=1)]):
    return {"foo": foo}


@app.get("/multiple")

`Field`는 `Query`, `Path`와 `Body`와 같은 방식으로 동작하며, 모두 같은 매개변수들 등을 가집니다.

/// note | 기술 세부사항

실제로 `Query`, `Path`등, 여러분이 앞으로 볼 다른 것들은 공통 클래스인 `Param` 클래스의 서브클래스 객체를 만드는데, 그 자체로 Pydantic의 `FieldInfo` 클래스의 서브클래스입니다.

그리고 Pydantic의 `Field` 또한 `FieldInfo`의 인스턴스를 반환합니다.

`Body` 또한 `FieldInfo`의 서브클래스 객체를 직접적으로 반환합니다. 그리고 `Body` 클래스의 서브클래스인 것들도 여러분이 나중에 보게될 것입니다.

}

func (q *preloadBuilder) Where(query interface{}, args ...interface{}) PreloadBuilder {
	q.db.Where(query, args...)
	return q
}

func (q *preloadBuilder) Or(query interface{}, args ...interface{}) PreloadBuilder {
	q.db.Where(query, args...)
	return q
}

func (q *preloadBuilder) Not(query interface{}, args ...interface{}) PreloadBuilder {
	q.db.Where(query, args...)
	return q
}

/** File generated by Grunt -- do not modify
 *  JQUERY-FORM-VALIDATOR
 *
 *  @version 2.3.77
 *  @website http://formvalidator.net/
 *  @author Victor Jonsson, http://victorjonsson.se
 *  @license MIT
 */

        assertEquals(FuzzyQuery.class, query.getClass());
        assertEquals("_default:fess", ((FuzzyQuery) query).getTerm().toString());

        query = queryParser.createDefaultFilterChain().parse("fess^10");
        assertEquals(BoostQuery.class, query.getClass());
        assertEquals("_default:fess", ((BoostQuery) query).getQuery().toString());

	stmt, err := db.prepare(ctx, db.ConnPool, false, query)
	if err == nil {
		rows, err = stmt.QueryContext(ctx, args...)
		if errors.Is(err, driver.ErrBadConn) {
			db.Stmts.Delete(query)
		}
	}
	return rows, err
}

func (db *PreparedStmtDB) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row {

            if (available) {
                cb.query().setAvailable_Equal(Constants.T);
            }
            if (idList != null) {
                cb.query().setId_InScope(idList);
            }
            cb.query().setName_NotEqual(ComponentUtil.getFessConfig().getFormAdminDefaultTemplateName());
            cb.query().addOrderBy_SortOrder_Asc();
            cb.query().addOrderBy_Name_Asc();

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.query;

import org.apache.lucene.search.Query;
import org.codelibs.fess.entity.QueryContext;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.query.parser.QueryParser;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;

        - name: facet.field
          in: query
          description: Facet field name
          required: false
          style: form
          explode: true
          schema:
            type: array
            items:
              type: string
            example: [label]
        - name: facet.query
          in: query
          description: Facet query
          required: false
          style: form