---

## Install FastAPI { #install-fastapi }

The first step is to install FastAPI.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then **install FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note

Cela comprend, par exemple :

* Les notifications par email envoyées après l'exécution d'une action :
    * Étant donné que se connecter à un serveur et envoyer un email a tendance à être «lent» (plusieurs secondes), vous pouvez retourner la réponse directement et envoyer la notification en arrière-plan.
* Traiter des données :

                    </div>
                </div>
            </div>
        </div>
        <section class="content">
            <la:form action="/admin/accesstoken/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2 || crudMode==3 || crudMode==4}">
                    <la:hidden property="id"/>

                    </div>
                </div>
            </div>
        </div>
        <section class="content">
            <la:form action="/admin/keymatch/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2 || crudMode==3 || crudMode==4}">
                    <la:hidden property="id"/>

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.ActionResponse;

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletResponse;

/**
 * Action class for handling thumbnail image requests.
 * Serves thumbnail images for documents in the search results.
 */
public class ThumbnailAction extends FessSearchAction {

    /**

                    </div>
                </div>
            </div>
        </div>
        <section class="content">
            <la:form action="/admin/relatedquery/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for suggest management.
 *
 */
public class AdminSuggestAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminSuggestAction() {
        super();
    }

                    </div>
                </div>
            </div>
        </div>
        <section class="content">
            <la:form action="/admin/role/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>

import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for Access Token management.
 * This class provides CRUD operations for access tokens.
 *
 */
public class AdminAccesstokenAction extends FessAdminAction {

    /**
     * Default constructor.
     */

import org.codelibs.fess.opensearch.log.cbean.cq.UserInfoCQ;
import org.codelibs.fess.opensearch.log.cbean.cq.bs.BsUserInfoCQ;
import org.dbflute.cbean.ConditionQuery;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.index.query.QueryBuilder;

/**
 * @author ESFlute (using FreeGen)
 */
public class BsUserInfoCB extends EsAbstractConditionBean {