And in the code, we get a `dict` with all the data sent by the client, **only the data sent by the client**, excluding any values that would be there just for being the default values. To do it we use `exclude_unset=True`. This is the main trick. 🪄

Then we use `hero_db.sqlmodel_update(hero_data)` to update the `hero_db` with the data from `hero_data`.

{* ../../docs_src/sql_databases/tutorial002_an_py310.py ln[83:93] hl[83:84,88:89] *}

 *       </ul>
 * </ul>
 *
 * <p>As such, the CycleDetectingLockFactory may not be suitable for performance-critical
 * applications which involve tightly-looped or deeply-nested locking algorithms.
 *
 * @author Darick Tong
 * @since 13.0
 */
@J2ktIncompatible
@GwtIncompatible
public class CycleDetectingLockFactory {

  /**
   * Encapsulates the action to be taken when a potential deadlock is encountered. Clients can use

```Dockerfile
CMD ["fastapi", "run", "app/main.py", "--proxy-headers", "--port", "80"]
```

#### Docker Cache { #docker-cache }

There's an important trick in this `Dockerfile`, we first copy the **file with the dependencies alone**, not the rest of the code. Let me tell you why is that.

```Dockerfile
COPY ./requirements.txt /code/requirements.txt
```

```Dockerfile
CMD ["fastapi", "run", "app/main.py", "--proxy-headers", "--port", "80"]
```

#### Docker-Cache { #docker-cache }

In diesem `Dockerfile` gibt es einen wichtigen Trick: Wir kopieren zuerst die **Datei nur mit den Abhängigkeiten**, nicht den Rest des Codes. Lassen Sie mich Ihnen erklären, warum.

```Dockerfile
COPY ./requirements.txt /code/requirements.txt
```

    // to validate the properties. We also need a way to navigate from the Tex specification documents to
    // the test in question and vice versa. A little Eclipse plugin would do the trick.
    @Test
    public void testThatExecutionsWithoutIdsAreMergedAndTheChildWins() throws Exception {
        PomTestWrapper tester = buildPom("micromailer");

- github.com/jmespath/go-jmespath: [c2b33e8 → v0.4.0](https://github.com/jmespath/go-jmespath/compare/c2b33e8...v0.4.0)
- github.com/karrick/godirwalk: [v1.7.5 → v1.16.1](https://github.com/karrick/godirwalk/compare/v1.7.5...v1.16.1)
- github.com/opencontainers/go-digest: [v1.0.0-rc1 → v1.0.0](https://github.com/opencontainers/go-digest/compare/v1.0.0-rc1...v1.0.0)

- github.com/inconshreveable/mousetrap: [v1.0.0 → v1.0.1](https://github.com/inconshreveable/mousetrap/compare/v1.0.0...v1.0.1)
- github.com/karrick/godirwalk: [v1.16.1 → v1.17.0](https://github.com/karrick/godirwalk/compare/v1.16.1...v1.17.0)
- github.com/konsorten/go-windows-terminal-sequences: [v1.0.2 → v1.0.3](https://github.com/konsorten/go-windows-terminal-sequences/compare/v1.0.2...v1.0.3)

                the OpenAPI version. But some tools, even though they might be
                compatible with OpenAPI 3.1.0, might not recognize it as a valid.

                So you could override this value to trick those tools into using
                the generated OpenAPI. Have in mind that this is a hack. But if you
                avoid using features added in OpenAPI 3.1.0, it might work for your
                use case.

 // IE9-11 hack to properly handle hyperlink underlines for breadcrumbs built\n  // without `<ul>`s. The `::before` pseudo-element generates an element\n  // *within* the .breadcrumb-item and thereby inherits the `text-decoration`.\n  //\n  // To trick IE into suppressing the underline, we give the pseudo-element an\n  // underline and then immediately remove it.\n  + .breadcrumb-item:hover::before {\n    text-decoration: underline;\n  }\n  // stylelint-disable-next-line no-duplicate-selectors\n...

 // IE9-11 hack to properly handle hyperlink underlines for breadcrumbs built\n  // without `<ul>`s. The `::before` pseudo-element generates an element\n  // *within* the .breadcrumb-item and thereby inherits the `text-decoration`.\n  //\n  // To trick IE into suppressing the underline, we give the pseudo-element an\n  // underline and then immediately remove it.\n  + .breadcrumb-item:hover::before {\n    text-decoration: underline;\n  }\n  // stylelint-disable-next-line no-duplicate-selectors\n...