/// tip

如果你需要在 async 函式內呼叫阻塞程式碼，或在阻塞函式中呼叫 async 函式，你可以使用 [Asyncer](https://asyncer.tiangolo.com)，它是 FastAPI 的姊妹函式庫。

///

### `yield from` { #yield-from }

當你在迭代某個物件（如類檔案物件），並對每個項目使用 `yield` 時，也可以用 `yield from` 直接逐項產出，省略 `for` 迴圈。

這不是 FastAPI 特有的功能，而是 Python 語法；不過這招很實用。 😎

/// tip | 팁

비동기 함수 안에서 블로킹 코드를 호출해야 하거나, 반대로 블로킹 함수 안에서 비동기 함수를 호출해야 한다면 FastAPI의 형제 라이브러리인 [Asyncer](https://asyncer.tiangolo.com)를 사용할 수 있습니다.

///

### `yield from` { #yield-from }

파일 유사 객체처럼 어떤 것을 순회하면서 각 항목마다 `yield`를 하는 대신, `yield from`을 사용해 각 항목을 직접 전달하고 `for` 루프를 생략할 수 있습니다.

이는 FastAPI에 특화된 기능이 아니라 순수한 파이썬 기능이지만, 알아두면 유용한 트릭입니다. 😎

	tx.Statement.Distinct = true
	if len(args) > 0 {
		tx = tx.Select(args[0], args[1:]...)
	}
	return
}

// Select specify fields that you want when querying, creating, updating
//
// Use Select when you only want a subset of the fields. By default, GORM will select all fields.
// Select accepts both string arguments and arrays.
//
//	// Select name and age of user using multiple arguments

@app.post("/chat/stream", response_class=EventSourceResponse)
async def stream_chat(prompt: Prompt) -> AsyncIterable[ServerSentEvent]:
    words = prompt.text.split()
    for word in words:
        yield ServerSentEvent(data=word, event="token")

    dep_a = generate_dep_a()
    try:
        yield dep_a
    finally:
        dep_a.close()


async def dependency_b(dep_a=Depends(dependency_a)):
    dep_b = generate_dep_b()
    try:
        yield dep_b
    finally:
        dep_b.close(dep_a)


async def dependency_c(dep_b=Depends(dependency_b)):
    dep_c = generate_dep_c()
    try:
        yield dep_c
    finally:

///

#### Data with values for fields with defaults { #data-with-values-for-fields-with-defaults }

But if your data has values for the model's fields with default values, like the item with ID `bar`:

```Python hl_lines="3  5"
{
    "name": "Bar",
    "description": "The bartenders",
    "price": 62,

    public String getIndex() {
        return index;
    }

    /**
     * Returns the supported fields.
     * @return The supported fields.
     */
    public String[] getSupportedFields() {
        return supportedFields;
    }

    /**
     * Returns the tag field names.
     * @return The tag field names.
     */
    public String[] getTagFieldNames() {
        return tagFieldNames;
    }

    /**

        negotiation = new SmbNegotiation(mockRequest, mockResponse, testRequestBuffer, testResponseBuffer);
    }

    @Test
    @DisplayName("Constructor should properly initialize all fields")
    void testConstructor() {
        // Verify all fields are properly initialized
        assertNotNull(negotiation);
        assertSame(mockRequest, negotiation.getRequest());
        assertSame(mockResponse, negotiation.getResponse());

 * Provides form fields and methods for handling search requests in the web interface.
 * Contains validation constraints and convenience methods for parameter processing.
 */
public class SearchForm extends SearchRequestParams {

    /**
     * Map of additional search fields with their values.
     */
    public Map<String, String[]> fields = new HashMap<>();

    /**

 * allowing the error page to display relevant information and preserve search context.
 */
public class ErrorForm {

    /** Map of form fields and their validation error messages */
    public Map<String, String[]> fields = new HashMap<>();

    /** Search query parameter that caused the error */
    public String q;

    /** URL parameter associated with the error */
    public String url;