// ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** createdBy */
    protected String createdBy;

    /** createdTime */
    protected Long createdTime;

public class BsSearchLogCB extends EsAbstractConditionBean {

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    protected BsSearchLogCQ _conditionQuery;
    protected BsSearchLogCA _conditionAggregation;

```Python hl_lines="35"
{!../../docs_src/openapi_callbacks/tutorial001.py!}
```

/// tip | "Tipp"

Beachten Sie, dass Sie nicht den Router selbst (`invoices_callback_router`) an `callback=` übergeben, sondern das Attribut `.routes`, wie in `invoices_callback_router.routes`.

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** createdAt */
    protected LocalDateTime createdAt;

    /** docId */
    protected String docId;

We could create an instance of this class with:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[18] *}

And that way we are able to "parameterize" our dependency, that now has `"bar"` inside of it, as the attribute `checker.fixed_content`.

## Use the instance as a dependency

    # - - - - - - - - - -/

    # /- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    # o dbfluteBeansPackageName (NotRequired - Default null)
    #  The default attribute expression of DBFlute DI configuration for Spring and Lucy.
    #
    # @SpringOnly
    #; dbfluteBeansDefaultAttribute = default-lazy-init="true"
    # - - - - - - - - - -/

    public static final String VIEW = "-view";

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    @Resource
    protected CrawlingConfigHelper crawlingConfigHelper;

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    @Resource
    private RelatedContentService relatedContentService;

    // ===================================================================================
    // Constant
    //

    // ===================================================================================
    // Attribute
    //
    @Resource
    private UserService userService;

    // ===================================================================================
    // Hook
    // ======

### Verwenden Sie das Attribut `app.dependency_overrides`.

Für diese Fälle verfügt Ihre **FastAPI**-Anwendung über das Attribut `app.dependency_overrides`, bei diesem handelt sich um ein einfaches `dict`.