// ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    @Resource
    private CrawlingInfoService crawlingInfoService;

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** available */
    protected Boolean available;

    /** boost */
    protected Float boost;

        private boolean sourceLevelSet = false;

        public void setSourceLevel(String sourceLevel) {
            if (sourceLevelSet) {
                throw new IllegalStateException("Cannot reset sourceLevel attribute; it is already set to: " + sourceLevel);
            } else if (!(USER_LEVEL.equals(sourceLevel) || GLOBAL_LEVEL.equals(sourceLevel))) {

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** Helper for key match operations. */
    @Resource
    private KeyMatchHelper keyMatchHelper;

Indem Sie von `str` erben, weiß die API Dokumentation, dass die Werte des Enums vom Typ `str` sein müssen, und wird in der Lage sein, korrekt zu rendern.

Erstellen Sie dann Klassen-Attribute mit festgelegten Werten, welches die erlaubten Werte sein werden:

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info

* For `PUT` requests to `/items/{item_id}`, read the body as JSON:
    * Check that it has a required attribute `name` that should be a `str`.
    * Check that it has a required attribute `price` that has to be a `float`.
    * Check that it has an optional attribute `is_offer`, that should be a `bool`, if present.
    * All this would also work for deeply nested JSON objects.

        super();
    }

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** The label type service for managing label type settings. */
    @Resource
    private LabelTypeService labelTypeService;

### `UploadFile`

`UploadFile` hat die folgenden Attribute:

* `filename`: Ein `str` mit dem ursprünglichen Namen der hochgeladenen Datei (z. B. `meinbild.jpg`).
* `content_type`: Ein `str` mit dem Inhaltstyp (MIME-Typ / Medientyp) (z. B. `image/jpeg`).

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** System properties for configuration management. */
    @Resource
    protected DynamicProperties systemProperties;

Use standard Python types for all the attributes:

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}


The same as when declaring query parameters, when a model attribute has a default value, it is not required. Otherwise, it is required. Use `None` to make it just optional.

For example, this model above declares a JSON "`object`" (or Python `dict`) like:

```JSON
{
    "name": "Foo",