}
    return new ConcatenatedHashFunction(hashFunctions);
  }

  /**
   * Used to randomize {@link #goodFastHash} instances, so that programs which persist anything
   * dependent on the hash codes they produce will fail sooner.
   */
  @SuppressWarnings("GoodTime") // reading system time without TimeSource
  static final int GOOD_FAST_HASH_SEED = (int) System.currentTimeMillis();

  /**

   * immediately reflected in the other. However, multiset changes may or may not be reflected in
   * any {@code Entry} instances already retrieved from the entry set (this is
   * implementation-dependent). Furthermore, implementations are not required to support
   * modifications to the entry set at all, and the {@code Entry} instances themselves don't even

/// info | 정보

이는 Pydantic 2 이상 버전에서 사용할 수 있습니다. 😎

///

/// tip | 팁

데이터베이스나 다른 API 같은 **외부 구성요소**와 통신이 필요한 어떤 종류의 검증이든 해야 한다면, 대신 **FastAPI Dependencies**를 사용해야 합니다. 이에 대해서는 나중에 배우게 됩니다.

이 커스텀 validator는 요청에서 제공된 **같은 데이터만**으로 확인할 수 있는 것들을 위한 것입니다.

///

### 코드 이해하기 { #understand-that-code }

func (m Migrator) CurrentDatabase() (name string) {
	m.DB.Raw("SELECT DATABASE()").Row().Scan(&name)
	return
}

// ReorderModels reorder models according to constraint dependencies
func (m Migrator) ReorderModels(values []interface{}, autoAdd bool) (results []interface{}) {
	type Dependency struct {
		*gorm.Statement
		Depends []*schema.Schema
	}

	var (

トークンの有効期限を指定した変数を作成します。

レスポンスのトークンエンドポイントで使用するPydanticモデルを定義します。

新しいアクセストークンを生成するユーティリティ関数を作成します。

{* ../../docs_src/security/tutorial004_an_py310.py hl[4,7,13:15,29:31,82:90] *}

## 依存関係の更新 { #update-the-dependencies }

`get_current_user`を更新して、先ほどと同じトークンを受け取るようにしますが、今回はJWTトークンを使用します。

受け取ったトークンをデコードして検証し、現在のユーザーを返します。

トークンが無効な場合は、すぐにHTTPエラーを返します。

{* ../../docs_src/security/tutorial004_an_py310.py hl[93:110] *}

* **Other objects**: no changes unless you explicitly request orphaning.

   *   <li>if truncating for display to users, there are other considerations that must be taken
   *       into account
   *   <li>the appropriate truncation indicator may be locale-dependent
   *   <li>it is safe to use non-ASCII characters in the truncation indicator
   * </ul>
   *
   * @throws IllegalArgumentException if {@code maxLength} is less than the length of {@code
   *     truncationIndicator}

    checkNotNull(file2);
    if (file1 == file2 || file1.equals(file2)) {
      return true;
    }

    /*
     * Some operating systems may return zero as the length for files denoting system-dependent
     * entities such as devices or pipes, in which case we must fall back on comparing the bytes
     * directly.
     */
    long len1 = file1.length();
    long len2 = file2.length();

			//   going to change w/o a language change.
			// - Internal and vendored packages do not contribute to our
			//   API surface. (If we are running within the "std" module,
			//   vendored dependencies appear as themselves instead of
			//   their "vendor/" standard-library copies.)
			// - 'go list std' does not include commands, which cannot be
			//   imported anyway.

/// info | 情報

これは Pydantic バージョン 2 以上で利用できます。 😎

///

/// tip | 豆知識

データベースや別の API など、何らかの **外部コンポーネント** との通信が必要なタイプのバリデーションを行う必要がある場合は、代わりに **FastAPI Dependencies** を使うべきです。これについては後で学びます。

これらのカスタムバリデータは、リクエストで提供された **同じデータのみ** でチェックできるもの向けです。

///

### そのコードを理解する { #understand-that-code }