required = append(required, fileFeatures(file, true)...)
	}
	exception := fileFeatures(filepath.Join(testenv.GOROOT(t), "api/except.txt"), false)

	if exitCode == 1 {
		t.Errorf("API database problems found")
	}
	if !compareAPI(bw, features, required, exception) {
		t.Errorf("API differences found")
	}
}

// export emits the exported package features.
func (w *Walker) export(pkg *apiPackage) {

pkg database/sql, method (*Conn) Raw(func(interface{}) error) error
pkg database/sql, method (*NullInt32) Scan(interface{}) error
pkg database/sql, method (NullInt32) Value() (driver.Value, error)
pkg database/sql, method (*NullTime) Scan(interface{}) error
pkg database/sql, method (NullTime) Value() (driver.Value, error)
pkg database/sql, type NullInt32 struct
pkg database/sql, type NullInt32 struct, Int32 int32

   */
  public static final MediaType KMZ = createConstant(APPLICATION_TYPE, "vnd.google-earth.kmz");

  /**
   * The <a href="https://tools.ietf.org/html/rfc4155">mbox database format</a>.
   *
   * @since 13.0
   */
  public static final MediaType MBOX = createConstant(APPLICATION_TYPE, "mbox");

  /**
   * <a

				"application/vnd.novadigm.edx",
				"application/vnd.novadigm.ext",
				"application/vnd.oasis.opendocument.chart",
				"application/vnd.oasis.opendocument.chart-template",
				"application/vnd.oasis.opendocument.database",
				"application/vnd.oasis.opendocument.formula",
				"application/vnd.oasis.opendocument.formula-template",
				"application/vnd.oasis.opendocument.graphics",
				"application/vnd.oasis.opendocument.graphics-template",

```

</div>

然后在 `/docs` UI 中，您能够看到 **FastAPI** 会用这些**模型**来**记录** API，并且还会用它们来**序列化**和**验证**数据。

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## 更新应用程序以支持多个模型

现在让我们稍微**重构**一下这个应用，以提高**安全性**和**多功能性**。

如果您查看之前的应用程序，您可以在 UI 界面中看到，到目前为止，由客户端决定要创建的 `Hero` 的 `id` 值。😱

```

</div>

그런 다음 `/docs` UI로 이동하면, **FastAPI**가 해당 **model들**을 사용하여 API **문서를 생성**하는 것으르 확인할 수 있습니다. 또한 이 모델들은 데이터를 직렬화하고 검증하는 데에도 사용됩니다.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## 여러 모델로 애플리케이션 업데이트

이제 애플리케이션을 약간 **리팩토링**하여 **보안**과 **유연성**을 개선해 보겠습니다.

이전 애플리케이션의 UI를 보면, 지금까지는 클라이언트가 생성할 `Hero`의 `id`를 직접 지정할 수 있다는 것을 알 수 있습니다. 😱

pkg crypto/x509, type CertificateRequest struct, Attributes //deprecated
pkg database/sql/driver, type ColumnConverter //deprecated
pkg database/sql/driver, type Conn interface, Begin //deprecated
pkg database/sql/driver, type Execer //deprecated
pkg database/sql/driver, type Queryer //deprecated
pkg database/sql/driver, type Stmt interface, Exec //deprecated
pkg database/sql/driver, type Stmt interface, Query //deprecated

*.cn-northwest-1.airflow.amazonaws.com.cn
*.cns.joyent.com
*.code.run
*.compute-1.amazonaws.com
*.compute.amazonaws.com
*.compute.amazonaws.com.cn
*.compute.estate
*.cryptonomic.net
*.customer-oci.com
*.d.crm.dev
*.database.run
*.dev-builder.code.com
*.dev.adobeaemcloud.com
*.developer.app
*.digitaloceanspaces.com
*.dweb.link
*.elb.amazonaws.com
*.elb.amazonaws.com.cn
*.er
*.eu-central-1.airflow.amazonaws.com

# Test Guide

```bash
cd tests
# prepare test databases
docker-compose up

# run all tests
./tests_all.sh

    page = context.new_page()
    page.goto("http://localhost:8000/docs")
    page.get_by_label("post /heroes/").click()
    # Manually add the screenshot
    page.screenshot(path="docs/en/docs/img/tutorial/sql-databases/image02.png")

    # ---------------------
    context.close()
    browser.close()


process = subprocess.Popen(
    ["fastapi", "run", "docs_src/sql_databases/tutorial002.py"],
)
try: