// Some MySQL has a 3072 byte limit on key sizes.
	mysqlCreateNamespaceTable = `CREATE TABLE %s (
             key_name VARCHAR(3072) NOT NULL,
             key_hash CHAR(64) GENERATED ALWAYS AS (SHA2(key_name, 256)) STORED NOT NULL PRIMARY KEY,
             value JSON)
           CHARACTER SET = utf8mb4 COLLATE = utf8mb4_bin ROW_FORMAT = Dynamic;`
	mysqlCreateAccessTable = `CREATE TABLE %s (event_time DATETIME NOT NULL, event_data JSON)

Mas dessa forma podemos focar em como o sistema de **Injeção de Dependência** funciona.

### Criando uma dependência, ou "injetável" { #create-a-dependency-or-dependable }

Primeiro vamos focar na dependência.

Ela é apenas uma função que pode receber os mesmos parâmetros de uma *função de operação de rota*:

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[8:9] *}

E pronto.

Vamos usar as ferramentas fornecidas pelo **FastAPI** para lidar com segurança.

## Como Parece { #how-it-looks }

Vamos primeiro usar o código e ver como funciona, e depois voltaremos para entender o que está acontecendo.

## Crie um `main.py` { #create-main-py }

Copie o exemplo em um arquivo `main.py`:

        deleteUserCodeFromCookie(request);
        return userCode;
    }

    /**
     * Creates an encrypted user code from a user ID.
     * The user ID is encrypted using the primary cipher and validated against the configuration.
     *
     * @param userCode the raw user ID to encrypt
     * @return the encrypted and validated user code, or null if invalid
     */

    This is useful when we use ConstrainedDecimal to represent Numeric(x,0)
    where an integer (but not int typed) is used. Encoding this as a float
    results in failed round-tripping between encode and parse.
    Our Id type is a prime example of this.

    >>> decimal_encoder(Decimal("1.0"))
    1.0

    >>> decimal_encoder(Decimal("1"))
    1

    >>> decimal_encoder(Decimal("NaN"))
    nan
    """

		stmt.Parse(&ColumnStruct2{})

		for _, columnType := range columnTypes {
			switch columnType.Name() {
			case "id":
				if v, ok := columnType.PrimaryKey(); !ok || !v {
					t.Fatalf("column id primary key should be correct, name: %v, column: %#v", columnType.Name(),
						columnType)
				}
			case "name":
				dataType := DB.Dialector.DataTypeOf(stmt.Schema.LookUpField(columnType.Name()))

				</div>
			</div>

			<div class="row justify-content-center">
				<div class="col-auto">
					<button type="submit" name="search" id="searchButton"
						class="btn btn-primary mx-auto">
						<em class="fa fa-search">
						<la:message key="labels.index_form_search_btn" />
					</button>
				</div>
			</div>
		</main>
		<jsp:include page="footer.jsp" />
	</la:form>

3rem;\n}\n.alert-dismissible .btn-close {\n  position: absolute;\n  top: 0;\n  right: 0;\n  z-index: 2;\n  padding: 1.25rem 1rem;\n}\n\n.alert-primary {\n  --bs-alert-color: var(--bs-primary-text-emphasis);\n  --bs-alert-bg: var(--bs-primary-bg-subtle);\n  --bs-alert-border-color: var(--bs-primary-border-subtle);\n  --bs-alert-link-color: var(--bs-primary-text-emphasis);\n}\n\n.alert-secondary {\n  --bs-alert-color: var(--bs-secondary-text-emphasis);\n  --bs-alert-bg: var(--bs-secondary-bg-subtle);\n...

 *       cryptographic hashes.)
 *   <li><b>fast:</b> perhaps self-explanatory, but often the most important consideration.
 * </ul>
 *
 * <h3>Providing input to a hash function</h3>
 *
 * <p>The primary way to provide the data that your hash function should act on is via a {@link
 * Hasher}. Obtain a new hasher from the hash function using {@link #newHasher}, "push" the relevant

 *       cryptographic hashes.)
 *   <li><b>fast:</b> perhaps self-explanatory, but often the most important consideration.
 * </ul>
 *
 * <h3>Providing input to a hash function</h3>
 *
 * <p>The primary way to provide the data that your hash function should act on is via a {@link
 * Hasher}. Obtain a new hasher from the hash function using {@link #newHasher}, "push" the relevant