Podemos declarar tudo isso sem precisar modificar o `APIRouter` original passando esses parâmetros para `app.include_router()`:

```Python hl_lines="14-17" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

Sem um sistema de validação de dados, você teria que realizar todas as verificações manualmente, no código.

Esses recursos são o que Marshmallow foi construído para fornecer. Ele é uma ótima biblioteca, e eu já utilizei muito antes.

build:win_clang_xla --compiler=clang-cl
build:win_clang_xla --linkopt=/FORCE:MULTIPLE
build:win_clang_xla --host_linkopt=/FORCE:MULTIPLE
test:win_clang_xla --action_env=PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW
test:win_clang_xla --linkopt=/FORCE:MULTIPLE
test:win_clang_xla --host_linkopt=/FORCE:MULTIPLE

# Options to build TensorFlow 1.x or 2.x.
# TODO(kanglan): Change v2's define to default behavior

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