<img src="/img/async/concurrent-burgers/concurrent-burgers-03.png" class="illustration">

Ödeme yapıyorsun. 💸

Kasiyer sana sıra numaranı veriyor.

<img src="/img/async/concurrent-burgers/concurrent-burgers-04.png" class="illustration">

     * @param queryTime The time taken to execute the query in milliseconds
     * @param partialResults Whether the results are partial
     * @param facetResponse The facet response containing aggregated data
     */
    SearchResult(final List<Map<String, Object>> documentList, final long allRecordCount, final String allRecordCountRelation,

  public void testDefaultBehaviorOfNextAndHasNext() {

    // This sample AbstractIterator returns 0 on the first call, 1 on the
    // second, then signals that it's reached the end of the data
    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          private int rep;

          @Override
          public @Nullable Integer computeNext() {
            switch (rep++) {

            "Cannot create a file when that file already exists.", "All pipe instances are busy.", "The pipe is being closed.",
            "No process is on the other end of the pipe.", "More data is available.", "This user account has expired.",
            "The user is not allowed to log on from this workstation.", "The user is not allowed to log on at this time.",
            "The password of this user has expired.", };

            "Cannot create a file when that file already exists.", "All pipe instances are busy.", "The pipe is being closed.",
            "No process is on the other end of the pipe.", "More data is available.", "This user account has expired.",
            "The user is not allowed to log on from this workstation.", "The user is not allowed to log on at this time.",
            "The password of this user has expired.", };

        NdrShort ns = new NdrShort(0xABCD); // value & 0xFF => 0xCD
        buf.reset();
        int startIndex = buf.getIndex();
        ns.encode(buf);

        // Find where the actual data starts (after alignment)
        int alignmentBytes = 0;
        if (startIndex % 2 != 0) {
            alignmentBytes = 1; // Need 1 byte of padding for 2-byte alignment
        }

                        tokBuf.append(tok.trim());
                        break;
                }
            }

            // Handle case where end of token stream and
            // still got data
            if ((!exit) && (tokStarted)) {
                retVal = tokBuf.toString();
            }
        }

        return optional ? "?" + retVal : retVal;
    }

Tarayıcınızda şöyle bir URL açarsanız:

```
http://127.0.0.1:8000/items/foo-item
```

...zorunlu `needy` parametresini eklemeden, şuna benzer bir hata görürsünüz:

```JSON
{
  "detail": [
    {
      "type": "missing",
      "loc": [
        "query",
        "needy"
      ],
      "msg": "Field required",
      "input": null
    }

/// tip | İpucu

İkili (binary) veri akışı yapmak istiyorsanız, örneğin video veya ses, gelişmiş kılavuza bakın: [Veri Akışı](../advanced/stream-data.md).

///

## FastAPI ile JSON Lines Akışı { #stream-json-lines-with-fastapi }

...`description` default değere sahip olduğu için, o alan için **hiçbir şey döndürmeseniz** bile yine de **o default değeri** alır.

### Output Response Verisi için Model { #model-for-output-response-data }

Dokümanlarla etkileşip response'u kontrol ederseniz, kod `description` alanlarından birine bir şey eklememiş olsa bile, JSON response default değeri (`null`) içerir:

<div class="screenshot">