# Migrate from Pydantic v1 to Pydantic v2 { #migrate-from-pydantic-v1-to-pydantic-v2 }

If you have an old FastAPI app, you might be using Pydantic version 1.

FastAPI version 0.100.0 had support for either Pydantic v1 or v2. It would use whichever you had installed.

FastAPI version 0.119.0 introduced partial support for Pydantic v1 from inside of Pydantic v2 (as `pydantic.v1`), to facilitate the migration to v2.

        super.connect();
    }
    
    private void performRdmaNegotiation() throws IOException {
        RdmaNegotiateRequest request = new RdmaNegotiateRequest();
        request.setMinVersion(0x0100);
        request.setMaxVersion(0x0100);
        request.setCreditsRequested(credits.getInitialCredits());
        request.setPreferredSendSize(maxReceiveSize);
        request.setMaxReceiveSize(maxReceiveSize);

    void testConstructorWithConfigOnly() {
        request = new Smb2QueryInfoRequest(mockConfig);

        assertNotNull(request);
        // SMB2_QUERY_INFO command value is 0x0010
        assertEquals((short) 0x0010, request.getCommand());

        // Verify that default file ID is set
        byte[] expectedFileId = Smb2Constants.UNSPECIFIED_FILEID;
        Field fileIdField;
        try {

        // Then
        assertEquals(4, bytesWritten);
        assertEquals(SmbComTransaction.TRANS_CALL_NAMED_PIPE, dst[0]);
        assertEquals((byte) 0x00, dst[1]);
        assertEquals((byte) 0x00, dst[2]);
        assertEquals((byte) 0x00, dst[3]);
    }

    @Test
    @DisplayName("Test writeSetupWireFormat with offset")
    void testWriteSetupWireFormatWithOffset() {
        // Given

# Pydantic v1에서 Pydantic v2로 마이그레이션하기 { #migrate-from-pydantic-v1-to-pydantic-v2 }

오래된 FastAPI 앱이 있다면 Pydantic 버전 1을 사용하고 있을 수 있습니다.

FastAPI 0.100.0 버전은 Pydantic v1 또는 v2 중 하나를 지원했습니다. 설치되어 있는 쪽을 사용했습니다.

FastAPI 0.119.0 버전에서는 v2로의 마이그레이션을 쉽게 하기 위해, Pydantic v2 내부에서 Pydantic v1을(`pydantic.v1`로) 부분적으로 지원하기 시작했습니다.

FastAPI 0.126.0 버전에서는 Pydantic v1 지원을 중단했지만, `pydantic.v1`은 잠시 동안 계속 지원했습니다.

/// warning | 경고

    public static final int PIPE_TYPE_CALL = 0x0100;

    /**
     * Pipe operations should behave like the <code>TransactNamedPipe</code> Win32 Named Pipe function.
     */

    public static final int PIPE_TYPE_TRANSACT = 0x0200;

    /**
     * Named pipe type flag for DCE RPC transact operations.
     */
    public static final int PIPE_TYPE_DCE_TRANSACT = 0x0200 | 0x0400;

    InputStream pipeIn;

        }

        @Test
        @DisplayName("Should handle ciphers with maximum value")
        void testMaximumCipherValues() throws SMBProtocolDecodingException {
            int[] ciphers = { 0xFFFF, 0x0000, 0x7FFF };
            EncryptionNegotiateContext originalContext = new EncryptionNegotiateContext(mockConfig, ciphers);

            int encoded = originalContext.encode(buffer, 0);

        assertEquals(0x400, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_STREAM_SIZE);
        assertEquals(0x800, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_STREAM_WRITE);
    }

    @Test
    @DisplayName("Should handle null file ID gracefully")
    void testNullFileId() {
        // Given
        byte[] nullFileId = new byte[16]; // All zeros

		0x8, 0x17, 0x23,
	}) {
		t.Fatalf("Bad key[0].Y, got %v", key0.Y.Bytes())
	} else if key1.E != 0x10001 {
		t.Fatalf("Bad key[1].E: %d", key1.E)
	} else if !bytes.Equal(key1.N.Bytes(), []byte{
		0xd2, 0xfc, 0x7b, 0x6a, 0xa, 0x1e,
		0x6c, 0x67, 0x10, 0x4a, 0xeb, 0x8f, 0x88, 0xb2, 0x57, 0x66, 0x9b, 0x4d, 0xf6,
		0x79, 0xdd, 0xad, 0x9, 0x9b, 0x5c, 0x4a, 0x6c, 0xd9, 0xa8, 0x80, 0x15, 0xb5,

        assertNotNull(result);
        assertTrue(result.contains("FileNotifyInformation"));
        assertTrue(result.contains("nextEntry=0"));
        assertTrue(result.contains("action=0x0000")); // Hexdump.toHexString produces 4-char padded hex
        assertTrue(result.contains("file=null"));
    }

    @ParameterizedTest
    @DisplayName("Test decode with aligned next entry offsets")