Pour distinguer les modèles avec toutes les valeurs optionnelles pour les mises à jour et les modèles avec des valeurs requises pour la création, vous pouvez utiliser les idées décrites dans [Modèles supplémentaires](extra-models.md).

Ensuite, ce système (dans ce cas **FastAPI**) se charge de faire tout le nécessaire pour fournir à votre code ces dépendances requises (« injecter » les dépendances).

C’est très utile lorsque vous avez besoin de :

* Avoir de la logique partagée (la même logique de code encore et encore).
* Partager des connexions à la base de données.

#### Does this PR introduce a user-facing change?
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```release-note

  SPDY_3("spdy/3.1"),

  /**
   * The IETF's binary-framed protocol that includes header compression, multiplexing multiple
   * requests on the same socket, and server-push. HTTP/1.1 semantics are layered on HTTP/2.
   *
   * HTTP/2 requires deployments of HTTP/2 that use TLS 1.2 support
   * [CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256], present in Java 8+ and Android 5+.

    grant_type: the OAuth2 spec says it is required and MUST be the fixed string "password".
        This dependency is strict about it. If you want to be permissive, use instead the
        OAuth2PasswordRequestForm dependency class.
    username: username string. The OAuth2 spec requires the exact field name "username".
    password: password string. The OAuth2 spec requires the exact field name "password".

  * This requires a Java application, and thus runtime, to run the tooling API client

As indicated, each of those components require a Java runtime to run.

The recommended way of invoking Gradle is to use the Gradle Wrapper.
The Wrapper then downloads the Gradle distribution (if necessary), starts the Launcher and runs the build, spawning and connecting to other processes such as the Daemon as required.

      apply {
        require(tls) { "no cipher suites for cleartext connections" }
        require(cipherSuites.isNotEmpty()) { "At least one cipher suite is required" }

        @Suppress("UNCHECKED_CAST")
        this.cipherSuites = cipherSuites.copyOf() as Array<String> // Defensive copy.
      }

    fun allEnabledTlsVersions() =
      apply {
        require(tls) { "no TLS versions for cleartext connections" }

In this case, it requires the scope `me` (it could require more than one scope).

/// note

You don't necessarily need to add different scopes in different places.

Have a simple and easy to use routing system.

///

### [Requests](https://requests.readthedocs.io) { #requests }

**FastAPI** is not actually an alternative to **Requests**. Their scope is very different.

It would actually be common to use Requests *inside* of a FastAPI application.

But still, FastAPI got quite some inspiration from Requests.

* A text editor or IDE. We use and recommend [IntelliJ IDEA CE](http://www.jetbrains.com/idea/). IntelliJ Ultimate will also work. You'll need IntelliJ 2021.2.2 or newer.
* [git](https://git-scm.com/) and a [GitHub account](https://github.com/join).