///

Whenever a new request arrives, **FastAPI** will take care of:

* Calling your dependency ("dependable") function with the correct parameters.
* Get the result from your function.
* Assign that result to the parameter in your *path operation function*.

```mermaid
graph TB

common_parameters(["common_parameters"])
read_items["/items/"]
read_users["/users/"]

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletResponse;

/**
 * Action class for handling thumbnail image requests.
 * Serves thumbnail images for documents in the search results.
 */
public class ThumbnailAction extends FessSearchAction {

    /**
     * Default constructor for ThumbnailAction.
     */
    public ThumbnailAction() {
        super();
    }

    private static String getResultMessage(final int result) {
        return result < 4 ? result_message[result] : "0x" + jcifs.util.Hexdump.toHexString(result, 4);
    }

    @Override
    public DcerpcException getResult() {
        if (this.result != 0) {
            return new DcerpcException(getResultMessage(this.result));
        }
        return null;
    }

    private DcerpcBinding binding;

    static String getResultMessage(final int result) {
        return result < 4 ? result_message[result] : "0x" + jcifs.smb1.util.Hexdump.toHexString(result, 4);
    }

    @Override
    public DcerpcException getResult() {
        if (result != 0) {
            return new DcerpcException(getResultMessage(result));
        }
        return null;
    }

    DcerpcBinding binding;

 * including tracking information for optimistic locking and audit trails.
 * Elevate words are used to boost specific documents in search results when certain keywords are matched.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**

			if err != nil {
				err = msgp.WrapError(err, "Results")
				return
			}
			if cap(z.Results) >= int(zb0002) {
				z.Results = (z.Results)[:zb0002]
			} else {
				z.Results = make([]int, zb0002)
			}
			for za0001 := range z.Results {
				z.Results[za0001], err = dc.ReadInt()
				if err != nil {
					err = msgp.WrapError(err, "Results", za0001)
					return
				}
			}
		default:

    @Size(max = 100)
    public String docId;

    /** Highlight query parameters. */
    public String[] hq;

    /** Search query parameter for error page. */
    public String q;

    /** Number of results parameter for error page. */
    public String num;

    /** Sort parameter for error page. */
    public String sort;

    /** Language parameter for error page. */
    public String lang;

    }

    @Override
    protected <RESULT extends ENTITY> RESULT delegateSelectEntity(final ConditionBean cb, final Class<? extends RESULT> entityType) {
        final List<? extends RESULT> list = delegateSelectList(cb, entityType);
        if (list.isEmpty()) {
            return null;
        }
        if (list.size() >= 2) {

🚥 👆 ⚙️ 🥉 🥳 🗃 👈 💬 👆 🤙 👫 ⏮️ `await`, 💖:

```Python
results = await some_library()
```

⤴️, 📣 👆 *➡ 🛠️ 🔢* ⏮️ `async def` 💖:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note

👆 💪 🕴 ⚙️ `await` 🔘 🔢 ✍ ⏮️ `async def`.

///

---

<abbr title="too long; didn't read（文長慎入）"><strong>TL;DR:</strong></abbr>

如果你正在使用要求你以 `await` 語法呼叫的第三方函式庫，例如：

```Python
results = await some_library()
```

然後，使用 `async def` 宣告你的*路徑操作函式*：


```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | 注意

你只能在 `async def` 建立的函式內使用 `await`。

///

---