Якщо ви не оголошуєте модель відповіді, **FastAPI** використає `jsonable_encoder`, описаний у [Сумісному з JSON кодері](../tutorial/encoder.md), і помістить результат у `JSONResponse`.

Ви також можете створити `JSONResponse` безпосередньо і повернути його.

/// tip | Порада

from fastapi import FastAPI
from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str | None = None
    description: str | None = None
    price: float | None = None
    tax: float = 10.5
    tags: list[str] = []


items = {
    "foo": {"name": "Foo", "price": 50.2},
    "bar": {"name": "Bar", "description": "The bartenders", "price": 62, "tax": 20.2},

			stdErrEnc.Encode(&log.Entry{
				Level:   ErrorKind,
				Message: msg,
				Time:    time.Now().UTC(),
				Trace:   &log.Trace{Message: msg},
			})
		}
		if err := w.rotate(); err != nil {
			msg := fmt.Sprintf("unable to rotate log file %v: %v", w.f.Name(), err)
			stdErrEnc.Encode(&log.Entry{
				Level:   ErrorKind,
				Message: msg,

/// note | Teknik Detaylar

Formlardan gelen veri, dosya içermiyorsa normalde "media type" olarak `application/x-www-form-urlencoded` ile encode edilir.

Ancak form dosya içeriyorsa `multipart/form-data` olarak encode edilir. `File` kullanırsanız, **FastAPI** dosyaları body’nin doğru kısmından alması gerektiğini bilir.

	s.data = ndata
}

// append single byte to scratch buffer
func (s *scratch) add(c byte) {
	if s.fill+1 >= cap(s.data) {
		s.grow()
	}

	s.data[s.fill] = c
	s.fill++
}

// append encoded rune to scratch buffer
func (s *scratch) addRune(r rune) int {
	if s.fill+utf8.UTFMax >= cap(s.data) {
		s.grow()
	}

	n := utf8.EncodeRune(s.data[s.fill:], r)
	s.fill += n
	return n

        assertEquals(expectedDecodeLength, response.decode(buffer, bufferIndex));

        // Test encode method
        byte[] dst = new byte[512];
        int dstIndex = 0;
        int expectedEncodeLength = 64;
        when(response.encode(dst, dstIndex)).thenReturn(expectedEncodeLength);
        assertEquals(expectedEncodeLength, response.encode(dst, dstIndex));

        // Test digest methods

				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *RenameDataInlineHandlerParams) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 1
	// write "p"
	err = en.Append(0x81, 0xa1, 0x70)
	if err != nil {
		return
	}
	err = z.RenameDataHandlerParams.EncodeMsg(en)
	if err != nil {
		err = msgp.WrapError(err, "RenameDataHandlerParams")

        assertEquals(SmbComTransaction.TRANS2_GET_DFS_REFERRAL, dst[5]);
        assertEquals((byte) 0x00, dst[6]);
    }

    @Test
    @DisplayName("writeParametersWireFormat should encode request buffer")
    void testWriteParametersWireFormat() throws Exception {
        // Given
        String filename = "\\\\server\\share";
        trans2GetDfsReferral = new Trans2GetDfsReferral(mockConfig, filename);

        assertThrows(IllegalArgumentException.class, () -> new Smb2LeaseKey(new byte[17]));
        assertThrows(IllegalArgumentException.class, () -> new Smb2LeaseKey(new byte[0]));
    }

    @Test
    @DisplayName("Should encode lease key to buffer")
    void testEncode() {
        byte[] testBytes = new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB,

        // Name: 4 bytes ("RqLs")
        // Padding: 4 bytes (to align data to 8-byte boundary)
        // Data: 32 bytes (lease V1 structure)
        return 16 + 4 + 4 + 32;
    }

    @Override
    public int encode(byte[] dst, int dstIndex) {
        int start = dstIndex;

        // Write context header
        SMBUtil.writeInt4(0, dst, dstIndex); // Next (offset to next context, 0 for last)
        dstIndex += 4;