![editor support](https://fastapi.tiangolo.com/img/pycharm-completion.png)

Bạn sẽ có được auto-completion trong code, thậm chí trước đó là không thể. Như trong ví dụ, khóa `price` bên trong một JSON (đó có thể được lồng nhau) đến từ một request.

Không còn nhập sai tên khóa, quay đi quay lại giữa các tài liệu hoặc cuộn lên cuộn xuống để tìm xem cuối cùng bạn đã sử dụng `username` hay `user_name`.

### Ngắn gọn

  }

  override fun noNewExchanges(connection: RealConnection) {
    connection.connectionListener.noNewExchanges(connection)
  }

  override fun doExtensiveHealthChecks(): Boolean {
    return chain.request.method != "GET"
  }

  override fun isCanceled(): Boolean {
    return call.isCanceled()
  }

  override fun candidateConnection(): RealConnection? {
    return call.connection
  }

                                        </table>
                                    </div>
                                </div>
                                <c:set var="pager" value="${userPager}" scope="request"/>
                                <c:import url="/WEB-INF/view/common/admin/crud/pagination.jsp"/>
                                <c:if test="${pager.currentPageNumber > pager.allPageCount}">

import org.apache.maven.api.annotations.NotThreadSafe;
import org.apache.maven.api.annotations.Nullable;

import static org.apache.maven.api.services.BaseRequest.nonNull;

/**
 * A request for installing one or more artifacts in the local repository.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface ArtifactInstallerRequest {

    @Nonnull
    Session getSession();

	defer cancel()

	restClnts, _ := ds.GetLockers()

	args := LockArgs{
		UID: id,
	}

	var wg sync.WaitGroup
	for index, c := range restClnts {
		wg.Add(1)
		// Send refresh request to all nodes
		go func(index int, c NetLocker) {
			defer wg.Done()
			c.ForceUnlock(ctx, args)
		}(index, c)
	}
	wg.Wait()
}

type refreshResult struct {
	offline   bool
	refreshed bool

### Kleine Fehler automatisch handhaben

Wenn beim Erstellen von Web-APIs mit FastAPI ein Fehler in unserem Code auftritt, wird FastAPI ihn normalerweise dem einzelnen Request zurückgeben, der den Fehler ausgelöst hat. 🛡

Der Client erhält für diesen Request einen **500 Internal Server Error**, aber die Anwendung arbeitet bei den nächsten Requests weiter, anstatt einfach komplett abzustürzen.

### Größere Fehler – Abstürze

* **Editor support**.
* **Type checks**.

...and **FastAPI** uses the same declarations to:

* **Define requirements**: from request path parameters, query parameters, headers, bodies, dependencies, etc.
* **Convert data**: from the request to the required type.
* **Validate data**: coming from each request:
    * Generating **automatic errors** returned to the client when the data is invalid.
* **Document** the API using OpenAPI:

		handlerFlags |= flag
	}

	// Get name of the handler using reflection.
	handlerName := getHandlerName(f, "adminAPIHandlers")

	var handler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
		// Update request context with `logger.ReqInfo`.
		r = r.WithContext(newContext(r, w, handlerName))

		defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))

🕴 ⚙️ `BackgroundTasks` (& 🚫 `BackgroundTask`), ⚫️ ⤴️ 💪 ⚙️ ⚫️ *➡ 🛠️ 🔢* 🔢 & ✔️ **FastAPI** 🍵 🎂 👆, 💖 🕐❔ ⚙️ `Request` 🎚 🔗.

⚫️ 💪 ⚙️ `BackgroundTask` 😞 FastAPI, ✋️ 👆 ✔️ ✍ 🎚 👆 📟 & 📨 💃 `Response` 🔌 ⚫️.

👆 💪 👀 🌖 ℹ <a href="https://www.starlette.io/background/" class="external-link" target="_blank">💃 🛂 🩺 🖥 📋</a>.

3. The `Author` dataclass includes a list of `Item` dataclasses.

4. The `Author` dataclass is used as the `response_model` parameter.

5. You can use other standard type annotations with dataclasses as the request body.

    In this case, it's a list of `Item` dataclasses.

6. Here we are returning a dictionary that contains `items` which is a list of dataclasses.