/// warning

Extra keys passed to `Field` will also be present in the resulting OpenAPI schema for your application.
As these keys may not necessarily be part of the OpenAPI specification, some OpenAPI tools, for example [the OpenAPI validator](https://validator.swagger.io/), may not work with your generated schema.

///

## Recap { #recap }

    * **⏩**: 🔧 ⏩ ⚙️ & 💡. 🌘 🕰 👂 🩺.
    * **📏**: 📉 📟 ❎. 💗 ⚒ ⚪️➡️ 🔠 🔢 📄.
    * **🏋️**: 🤚 🏭-🔜 📟. ⏮️ 🏧 🎓 🧾.
    * **🐩-⚓️**: ⚓️ 🔛 (&amp; 🍕 🔗 ⏮️) 📂 🐩 🔗: <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank">🗄</a> &amp; <a href="https://json-schema.org/" class="external-link" target="_blank">🎻 🔗</a>.

## Adding ASGI middlewares { #adding-asgi-middlewares }

As **FastAPI** is based on Starlette and implements the <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr> specification, you can use any ASGI middleware.

A middleware doesn't have to be made for FastAPI or Starlette to work, as long as it follows the ASGI spec.

        } catch (nsae: NoSuchAlgorithmException) {
          SSLContext.getInstance("TLS")
        }
    }

  companion object {
    val isAvailable: Boolean

    val majorVersion = System.getProperty("java.specification.version")?.toIntOrNull()

    init {
      isAvailable =
        if (majorVersion != null) {
          majorVersion >= 9
        } else {
          try {
            // also present on JDK8 after build 252.

/**
 * An implementation of {@code Iterable} which throws an exception on all invocations of the {@link
 * #iterator()} method after the first, and whose iterator is always unmodifiable.
 *
 * <p>The {@code Iterable} specification does not make it absolutely clear what should happen on a
 * second invocation, so implementors have made various choices, including:
 *
 * <ul>
 *   <li>returning the same iterator again

    private static URLStreamHandlerFactory factory;

    /**
     * Sets the URL stream handler factory for the environment.  This
     * allows specification of the factory used in creating underlying
     * stream handlers.  This can be called once per JVM instance.
     *
     * @param factory The URL stream handler factory.
     */

### Technical Details: `root_path` { #technical-details-root-path }

When you mount a sub-application as described above, FastAPI will take care of communicating the mount path for the sub-application using a mechanism from the ASGI specification called a `root_path`.

That way, the sub-application will know to use that path prefix for the docs UI.

        #  Additional schemas have original settings apart from the main schema.
        #  The settings are objectTypeTargetList, tableExceptList,
        #  tableTargetList, and columnExceptMap.
        #  They have the same specification as ones of the main schema.
        #  Elements of this map are as below: 
        #    o objectTypeTargetList: (NotRequired - Default 'map:{TABLE;VIEW}')
        #    o tableExceptList: (NotRequired - Default list:{})

    * **Güçlü**: Production-ready. Otomatik interaktif dökümantasyon.
    * **Standartlara dayalı**: API'ler için açık standartlara dayanır (ve tamamen uyumludur): <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank">OpenAPI</a> ve <a href="https://json-schema.org/" class="external-link" target="_blank">JSON Şeması</a>.

* <a href="https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#parameter-object" class="external-link" target="_blank">`(명세서에 있는) Parameter Object`</a>는 FastAPI의 다음 기능에서 쓰였습니다:
    * `Path()`
    * `Query()`
    * `Header()`
    * `Cookie()`