They tend to require more complex configurations, a message/job queue manager, like RabbitMQ or Redis, but they allow you to run background tasks in multiple processes, and especially, in multiple servers.

{* ../../docs_src/body_multiple_params/tutorial002_py310.py hl[20] *}

Dans ce cas, **FastAPI** détectera qu'il y a plus d'un paramètre dans le body (chacun correspondant à un modèle Pydantic).

Il utilisera alors les noms des paramètres comme clés, et s'attendra à recevoir quelque chose de semblable à :

```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,

   *   <li>The subdelimiters "!", "$", "&amp;", "'", "(", ")", "*", "+", ",", ";", and "=" remain
   *       the same.
   *   <li>The space character " " is converted into %20.
   *   <li>Fragments allow unescaped "/" and "?", so they remain the same.
   *   <li>All other characters are converted into one or more bytes using UTF-8 encoding and each

        // When
        boolean allowChain = request.allowChain(nextRequest);

        // Then
        assertFalse(allowChain, "Cancel requests should not allow chaining");
    }

    @Test
    @DisplayName("Test split returns null")
    void testSplit() {
        // Given
        Smb2CancelRequest request = new Smb2CancelRequest(mockConfig, 1L, 0L);

        this.useRobotsTxtDisallows = useRobotsTxtDisallows;
    }

    /**
     * Sets whether to use robots.txt allow rules.
     *
     * @param useRobotsTxtAllows True to use allow rules, false otherwise
     */
    public void setUseRobotsTxtAllows(final boolean useRobotsTxtAllows) {
        this.useRobotsTxtAllows = useRobotsTxtAllows;
    }

      InternetDomainName domain = InternetDomainName.from(inputName);

      /*
       * We would ordinarily use constants for the expected results, but
       * doing it by derivation allows us to reuse the test case definitions
       * used in other tests.
       */

      String expectedName = Ascii.toLowerCase(inputName);
      expectedName = expectedName.replaceAll("[\u3002\uFF0E\uFF61]", ".");

    }

    /* 0 - not connected
     * 1 - connecting
     * 2 - connected
     * 3 - disconnecting
     */
    int connectionState;
    int uid;
    Vector trees;
    // Transport parameters allows trans to be removed from CONNECTIONS
    private final UniAddress address;
    private final int port, localPort;
    private final InetAddress localAddr;

    SmbTransport transport = null;

          <name>servers</name>
          <version>1.0.0+</version>
          <description>
            Configuration of server-specific settings, mainly authentication
            method. This allows configuration of authentication on a per-server
            basis.
          </description>
          <association>
            <type>Server</type>
            <multiplicity>*</multiplicity>
          </association>

  /**
   * Returns the escaped form of a given literal string, starting at the given index. This method is
   * called by the {@link #escape(String)} method when it discovers that escaping is required. It is
   * protected to allow subclasses to override the fastpath escaping function to inline their
   * escaping test. See {@link CharEscaperBuilder} for an example usage.
   *
   * @param s the literal string to be escaped

      try {
        Object actualReturnValue = method.invoke(wrapper, passedArgs);
        // If we think this might be a 'chaining' call then we allow the return value to either
        // be the wrapper or the returnValue.
        if (!isPossibleChainingCall || wrapper != actualReturnValue) {
          assertEquals(