**FastAPI** uses it so that, if you use a Pydantic model in `response_model`, and your data has an error, you will see the error in your log.

But the client/user will not see it. Instead, the client will receive an "Internal Server Error" with an HTTP status code `500`.

    public String id;

    /** Search term for filtering related content. */
    public String term;

    /** Content text for filtering related content. */
    public String content;

    /** User who created the related content. */
    public String createdBy;

    /** Creation time of the related content. */
    public String createdTime;

    /** Version number for optimistic locking. */

import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.api.ApiResult;
import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.opensearch.user.exentity.Role;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin role management.
 */

            tempDir.delete();
            tempDir.mkdirs();

            // robots.txt
            StringBuilder buf = new StringBuilder();
            buf.append("User-agent: *").append('\n');
            buf.append("Disallow: /admin/").append('\n');
            buf.append("Disallow: /websvn/").append('\n');
            final File robotTxtFile = new File(tempDir, "robots.txt");

								<div class="dropdown">
									<a id="userMenu" class="nav-link dropdown-toggle" data-bs-toggle="dropdown"
										href="#" role="button" aria-haspopup="true"
										aria-expanded="false"> <em class="fa fa-fw fa-user">
										<span>${username}</span>
									</a>
									<div class="dropdown-menu" aria-labelledby="userMenu">
										<c:if test="${editableUser == true}">

								<div class="dropdown">
									<a id="userMenu" class="nav-link dropdown-toggle" data-bs-toggle="dropdown"
										href="#" role="button" aria-haspopup="true"
										aria-expanded="false"> <em class="fa fa-fw fa-user">
										<span>${username}</span>
									</a>
									<div class="dropdown-menu" aria-labelledby="userMenu">
										<c:if test="${editableUser == true}">

import okhttp3.UrlComponentEncodingTester.Component

fun urlComponentEncodingTesterJvmPlatform(component: Component): UrlComponentEncodingTester.Platform =
  when (component) {
    Component.USER ->
      UrlComponentEncodingTesterJvmPlatform()
        .escapeForUri('%'.code)

    Component.PASSWORD ->
      UrlComponentEncodingTesterJvmPlatform()
        .escapeForUri('%'.code)

    Component.HOST ->

/// tip | Tipp

All dies scheint angesichts dieser einfachen Beispiele möglicherweise nicht so nützlich zu sein.

Aber Sie werden in den Kapiteln über **Sicherheit** sehen, wie nützlich das ist.

Und Sie werden auch sehen, wie viel Code Sie dadurch einsparen.

     *
     * @param query the search query string
     * @param params search request parameters including pagination and filters
     * @param userBean optional user information for personalized search
     * @return list of search result documents with fused ranking scores
     */
    public List<Map<String, Object>> search(final String query, final SearchRequestParams params,

### Cache the OpenAPI schema { #cache-the-openapi-schema }

You can use the property `.openapi_schema` as a "cache", to store your generated schema.

That way, your application won't have to generate the schema every time a user opens your API docs.

It will be generated only once, and then the same cached schema will be used for the next requests.

{* ../../docs_src/extending_openapi/tutorial001.py hl[13:14,25:26] *}