Для обеспечения всех подключений приложения к одной базе данных нужен только один объект соединения `engine`.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[14:18] hl[14:15,17:18] *}

pkg debug/elf, const R_MIPS_16 R_MIPS
pkg debug/elf, const R_MIPS_26 = 4
pkg debug/elf, const R_MIPS_26 R_MIPS
pkg debug/elf, const R_MIPS_32 = 2
pkg debug/elf, const R_MIPS_32 R_MIPS
pkg debug/elf, const R_MIPS_64 = 18
pkg debug/elf, const R_MIPS_64 R_MIPS
pkg debug/elf, const R_MIPS_ADD_IMMEDIATE = 34
pkg debug/elf, const R_MIPS_ADD_IMMEDIATE R_MIPS
pkg debug/elf, const R_MIPS_CALL16 = 11
pkg debug/elf, const R_MIPS_CALL16 R_MIPS

  public void testToString_delayedTimeout() throws Exception {
    Integer javaVersion = Ints.tryParse(JAVA_SPECIFICATION_VERSION.value());
    // Parsing to an integer might fail because Java 8 returns "1.8" instead of "8."
    // We can continue if it's 1.8, and we can continue if it's an integer in [9, 20).
    if (javaVersion != null && javaVersion >= 20) {
      // TODO(b/261217224, b/361604053): Make this test work under newer JDKs.
      return;

	{dataBlocks: 5, onDisks: 10, offDisks: 1, blocksize: int64(blockSizeV2), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                         // 18
	{dataBlocks: 6, onDisks: 12, offDisks: 3, blocksize: int64(blockSizeV2), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: SHA256, shouldFail: false, shouldFailQuorum: false},
	// 19

        src[17] = 0; // End marker

        Name name = new Name(mockConfig);
        int length = name.readScopeWireFormat(src, 0);

        assertEquals("test.example.com", name.scope);
        assertEquals(18, length);
    }

    @Test
    void constructor_withNetbiosNameNotNameInstance_shouldNotCopySrcHashCode() {
        // Create a mock NetbiosName that is not a Name instance

    }
  }

  private static boolean isWindows() {
    return OS_NAME.value().startsWith("Windows");
  }

  private static boolean isJava8() {
    return JAVA_SPECIFICATION_VERSION.value().equals("1.8");
  }

さて、このパラメータが気に入らなくなったとしましょう

それを使っているクライアントがいるので、しばらくは残しておく必要がありますが、ドキュメントには<abbr title="使わない方がよい">非推奨</abbr>と明記しておきたいです。

その場合、`Query`にパラメータ`deprecated=True`を渡します:

{* ../../docs_src/query_params_str_validations/tutorial010.py hl[18] *}

ドキュメントは以下のようになります:

<img src="https://fastapi.tiangolo.com/img/tutorial/query-params-str-validations/image01.png">

## まとめ

パラメータに追加のバリデーションとメタデータを宣言することができます。

一般的なバリデーションとメタデータ:

Tendrías **un solo objeto `engine`** para todo tu código para conectar a la misma base de datos.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[14:18] hl[14:15,17:18] *}

Usar `check_same_thread=False` permite a FastAPI usar la misma base de datos SQLite en diferentes hilos. Esto es necesario ya que **una sola request** podría usar **más de un hilo** (por ejemplo, en dependencias).

 */
public class ComparableVersion implements Comparable<ComparableVersion> {
    private static final int MAX_INTITEM_LENGTH = 9;

    private static final int MAX_LONGITEM_LENGTH = 18;

    private String value;

    private String canonical;

    private ListItem items;

    private interface Item {
        int INT_ITEM = 3;
        int LONG_ITEM = 4;
        int BIGINTEGER_ITEM = 0;

You would have **one single `engine` object** for all your code to connect to the same database.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[14:18] hl[14:15,17:18] *}

Using `check_same_thread=False` allows FastAPI to use the same SQLite database in different threads. This is necessary as **one single request** could use **more than one thread** (for example in dependencies).