Query параметр `q` має тип `str | None`, що означає, що він може бути як `str`, так і `None`. За замовчуванням він має значення `None`, тому FastAPI розуміє, що цей параметр не є обов'язковим.

/// note | Примітка

FastAPI знає, що `q` не є обов’язковим, завдяки значенню за замовчуванням `= None`.

Використання `str | None` дозволить Вашому редактору коду надавати кращу підтримку та виявляти помилки.

///

 *     ExecutionException}, {@code UncheckedExecutionException}, and {@code ExecutionError}. Any
 *     code that is still catching {@code ComputationException} may need to be updated to catch some
 *     of those types instead. (Note that this type, though deprecated, is not planned to be removed
 *     from Guava.)
 */
@Deprecated
@GwtCompatible
public class ComputationException extends RuntimeException {

 *     ExecutionException}, {@code UncheckedExecutionException}, and {@code ExecutionError}. Any
 *     code that is still catching {@code ComputationException} may need to be updated to catch some
 *     of those types instead. (Note that this type, though deprecated, is not planned to be removed
 *     from Guava.)
 */
@Deprecated
@GwtCompatible
public class ComputationException extends RuntimeException {

import java.io.File;

import org.apache.maven.toolchain.model.PersistedToolchains;

/**
 * Builds the toolchains model from a previously configured filesystem path to the toolchains file.
 * <strong>Note:</strong> This is an internal component whose interface can change without prior notice.
 *
 * @deprecated use {@link org.apache.maven.toolchain.building.ToolchainsBuilder} instead
 */
@Deprecated

Це дозволить Вам повторно **використовувати модель** в **різних місцях**, а також оголосити валідації та метадані для всіх параметрів одночасно. 😎

/// note | Нотатки

Ця можливість підтримується починаючи з версії FastAPI `0.115.0`. 🤓

///

## Параметри Заголовків з Використанням Pydantic Model

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */

     * @return {@code true} if passed problem is preserved by this call.
     */
    boolean reportProblem(P problem);

    /**
     * Returns all reported and preserved problems ordered by severity in decreasing order. Note: counters and
     * element count in this stream does not have to be equal.
     */
    @Nonnull
    default Stream<P> problems() {
        Stream<P> result = Stream.empty();

 * or even removal, in a future release. An API bearing this annotation is exempt from any
 * compatibility guarantees made by its containing library. Note that the presence of this
 * annotation implies nothing about the quality or performance of the API in question, only the fact
 * that it is not "API-frozen."
 *