/// tip | Consejo

Nota que, al igual que [dependencias en decoradores de *path operations*](dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, ningún valor será pasado a tu *path operation function*.

///

El resultado final es que los paths de item son ahora:

* `/items/`
* `/items/{item_id}`

/// tip | Dica

Observe que, assim como [dependências em *decoradores de operação de rota*](dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, nenhum valor será passado para sua *função de operação de rota*.

///

O resultado final é que os caminhos dos itens agora são:

* `/items/`
* `/items/{item_id}`

      - tutorial/dependencies/index.md
      - tutorial/dependencies/classes-as-dependencies.md
      - tutorial/dependencies/sub-dependencies.md
      - tutorial/dependencies/dependencies-in-path-operation-decorators.md
      - tutorial/dependencies/global-dependencies.md
      - tutorial/dependencies/dependencies-with-yield.md
    - Security:
      - tutorial/security/index.md
      - tutorial/security/first-steps.md

{* ../../docs_src/first_steps/tutorial001.py hl[6] *}

`@app.get("/")` 💬 **FastAPI** 👈 🔢 ▶️️ 🔛 🈚 🚚 📨 👈 🚶:

* ➡ `/`
* ⚙️ <abbr title="an HTTP GET method"><code>get</code> 🛠️</abbr>

/// info | `@decorator` ℹ

👈 `@something` ❕ 🐍 🤙 "👨‍🎨".

👆 🚮 ⚫️ 🔛 🔝 🔢. 💖 📶 📔 👒 (👤 💭 👈 🌐❔ ⚖ 👟 ⚪️➡️).

 "👨‍🎨" ✊ 🔢 🔛 &amp; 🔨 🕳 ⏮️ ⚫️.

👆 💼, 👉 👨‍🎨 💬 **FastAPI** 👈 🔢 🔛 🔗 **➡** `/` ⏮️ **🛠️** `get`.

 * A list which forwards all its method calls to another list. Subclasses should override one or
 * more methods to modify the behavior of the backing list as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p>This class does not implement {@link java.util.RandomAccess}. If the delegate supports random
 * access, the {@code ForwardingList} subclass should implement the {@code RandomAccess} interface.
 *

 * should override one or more methods to modify the behavior of the backing multiset as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingSortedMultiset} forward
 * <b>indiscriminately</b> to the methods of the delegate. For example, overriding {@link

 * should override one or more methods to modify the behavior of the backing multiset as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingSortedMultiset} forward
 * <b>indiscriminately</b> to the methods of the delegate. For example, overriding {@link

Das war's schon.

**Zwei Zeilen**.

Und sie hat die gleiche Form und Struktur wie alle Ihre *Pfadoperation-Funktionen*.

Sie können sie sich als *Pfadoperation-Funktion* ohne den „Dekorator“ (ohne `@app.get("/some-path")`) vorstellen.

Und sie kann alles zurückgeben, was Sie möchten.

In diesem Fall erwartet diese Abhängigkeit:

* Einen optionalen Query-Parameter `q`, der ein `str` ist.

* **Rozszerzalność**:
    * Pydantic umożliwia zdefiniowanie niestandardowych typów danych lub rozszerzenie walidacji o metody na modelu, na których użyty jest dekorator walidatora.

* **Uitbreidbaar**:
    * Met Pydantic kunnen op maat gemaakte datatypen worden gedefinieerd of je kunt validatie uitbreiden met methoden op een model dat is ingericht met de decorator validator.