tests := []struct {
		comment string
		ok      bool
	}{
		{"hi, hello", true},
		{"hi, こんにちわ", true},
		{strings.Repeat("a", uint16max), true},
		{strings.Repeat("a", uint16max+1), false},
	}

	for _, test := range tests {
		// write a zip file
		buf := new(bytes.Buffer)
		w := NewWriter(buf)
		if err := w.SetComment(test.comment); err != nil {
			if test.ok {

Para excluir un parámetro de query del esquema de OpenAPI generado (y por lo tanto, de los sistemas de documentación automática), establece el parámetro `include_in_schema` de `Query` a `False`:

{* ../../docs_src/query_params_str_validations/tutorial014_an_py310.py hl[10] *}

## Validación personalizada { #custom-validation }

### Desactivar el server automático de `root_path` { #disable-automatic-server-from-root-path }

Si no quieres que **FastAPI** incluya un server automático usando el `root_path`, puedes usar el parámetro `root_path_in_servers=False`:

{* ../../docs_src/behind_a_proxy/tutorial004_py39.py hl[9] *}

y entonces no lo incluirá en el esquema de OpenAPI.

## Montando una sub-aplicación { #mounting-a-sub-application }

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).

// The string can be an encrypted, singlepart
// or multipart S3 ETag. It returns an error if s is
// not a valid textual representation of an ETag.
func Parse(s string) (ETag, error) {
	const strict = false
	return parse(s, strict)
}

// parse parse s as an S3 ETag, returning the result.
// It operates in one of two modes:
//   - strict
//   - non-strict
//
// In strict mode, parse only accepts ETags that

SQLModel 的引擎 `engine`（实际上它是一个 SQLAlchemy `engine` ）是用来与数据库**保持连接**的。

您只需构建**一个 `engine`**，来让您的所有代码连接到同一个数据库。

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

使用 `check_same_thread=False` 可以让 FastAPI 在不同线程中使用同一个 SQLite 数据库。这很有必要，因为**单个请求**可能会使用**多个线程**（例如在依赖项中）。

不用担心，我们会按照代码结构确保**每个请求使用一个单独的 SQLModel *会话***，这实际上就是 `check_same_thread` 想要实现的。

### 创建表

<code>real</code> and <code>imag</code> applied to a complex constant
and <code>complex</code> applied to numeric constants.
The boolean truth values are represented by the predeclared constants
<code>true</code> and <code>false</code>. The predeclared identifier
<a href="#Iota">iota</a> denotes an integer constant.
</p>

<p>
In general, complex constants are a form of
<a href="#Constant_expressions">constant expression</a>

			HandlerFunc(adminMiddleware(adminAPI.SetPolicyForUserOrGroup)).
			Queries("policyName", "{policyName:.*}", "userOrGroup", "{userOrGroup:.*}", "isGroup", "{isGroup:true|false}")

		// Attach/Detach policies to/from user or group
		adminRouter.Methods(http.MethodPost).Path(adminVersion + "/idp/builtin/policy/{operation}").HandlerFunc(adminMiddleware(adminAPI.AttachDetachPolicyBuiltin))

        default. They can be disabled by configuring
        `tf.data.experimental.OptimizationOptions` to set `map_and_batch =
        False` or `noop_elimination = False` respectively. To disable all
        default optimizations, set `apply_default_optimizations = False`.
    *   Support parallel map in `map_and_filter_fusion`.
    *   Disable static optimizations for input pipelines that use non-resource

### Desabilitar servidor automático de `root_path` { #disable-automatic-server-from-root-path }

Se você não quiser que o **FastAPI** inclua um servidor automático usando o `root_path`, você pode usar o parâmetro `root_path_in_servers=False`:

{* ../../docs_src/behind_a_proxy/tutorial004_py39.py hl[9] *}

e então ele não será incluído no OpenAPI schema.

## Montando uma sub-aplicação { #mounting-a-sub-application }