c_ISUID = 04000 // Set uid
	c_ISGID = 02000 // Set gid
	c_ISVTX = 01000 // Save text (sticky bit)

	// Common Unix mode constants; these are not defined in any common tar standard.
	// Header.FileInfo understands these, but FileInfoHeader will never produce these.
	c_ISDIR  = 040000  // Directory
	c_ISFIFO = 010000  // FIFO
	c_ISREG  = 0100000 // Regular file
	c_ISLNK  = 0120000 // Symbolic link

-xl-5,.col-xl-6,.col-xl-7,.col-xl-8,.col-xl-9,.col-xl-auto{position:relative;width:100%;padding-right:15px;padding-left:15px}.col{-ms-flex-preferred-size:0;flex-basis:0;-ms-flex-positive:1;flex-grow:1;max-width:100%}.row-cols-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-5>*{-ms-flex:0 0 20%;flex:0...

# 從 Pydantic v1 遷移到 Pydantic v2 { #migrate-from-pydantic-v1-to-pydantic-v2 }

如果你有一個舊的 FastAPI 應用，可能正在使用 Pydantic 1 版。

FastAPI 0.100.0 同時支援 Pydantic v1 或 v2，會使用你已安裝的那個版本。

FastAPI 0.119.0 透過 Pydantic v2 內的 `pydantic.v1` 提供對 Pydantic v1 的部分支援，以便遷移到 v2。

FastAPI 0.126.0 移除了對 Pydantic v1 的支援，但在一段時間內仍支援 `pydantic.v1`。

/// warning

Pydantic 團隊自 **Python 3.14** 起，已停止在最新的 Python 版本中支援 Pydantic v1。

這也包含 `pydantic.v1`，在 Python 3.14 及以上版本不再支援。

        // Test with different implementations to ensure interface contract
        IndexUpdateCallback callback1 = createMockCallback(10, 500);
        IndexUpdateCallback callback2 = createMockCallback(20, 1000);

        assertEquals(10L, callback1.getDocumentSize());
        assertEquals(500L, callback1.getExecuteTime());

        assertEquals(20L, callback2.getDocumentSize());

    for (int exponent : asList(2, 3, 4, 9, 15, 16, 17, 24, 25, 30)) {
      int x = 1 << exponent;
      intValues.add(x, x + 1, x - 1);
    }
    intValues.add(9999).add(10000).add(10001).add(1000000); // near powers of 10
    intValues.add(5792).add(5793); // sqrt(2^25) rounded up and down
    POSITIVE_INTEGER_CANDIDATES = intValues.build();
    NEGATIVE_INTEGER_CANDIDATES =
        ImmutableList.copyOf(

		go func() {
			for in := range r.input {
				if len(in.input) == 0 {
					in.dst <- nil
					continue
				}
				dst := r.kvDstPool.Get()
				if len(dst) < 1000 {
					dst = make([]jstream.KVS, 0, 1000)
				}

				d := jstream.NewDecoder(bytes.NewBuffer(in.input), 0).ObjectAsKVS().MaxDepth(100)
				stream := d.Stream()
				all := dst[:0]
				for mv := range stream {

		go func() {
			for in := range r.input {
				if len(in.input) == 0 {
					in.dst <- nil
					continue
				}
				dst := r.csvDstPool.Get()
				if len(dst) < 1000 {
					dst = make([][]string, 0, 1000)
				}

				cr := newReader(bytes.NewBuffer(in.input))
				all := dst[:0]
				err := func() error {
					// Read all records until EOF or another error.
					for {

            private static final long serialVersionUID = 1L;

            @Override
            public String getTimeAdjustTimeMillis() {
                return "0x1000"; // Hex notation string
            }

            @Override
            public Long getTimeAdjustTimeMillisAsLong() {
                return 4096L; // Decimal equivalent
            }
        };

    </a>
    <a href="https://x.com/gradle">
        <img src="https://img.shields.io/badge/-000000?style=for-the-badge&logo=x&logoColor=white" alt="X (Twitter)" style="margin: 0 20px;">
    </a>
    <a href="https://www.youtube.com/@GradleInc">

	return unsigned, signed
}

// reset clears the block with all zeros.
func (b *block) reset() {
	*b = block{}
}

type headerV7 [blockSize]byte

func (h *headerV7) name() []byte     { return h[000:][:100] }
func (h *headerV7) mode() []byte     { return h[100:][:8] }
func (h *headerV7) uid() []byte      { return h[108:][:8] }
func (h *headerV7) gid() []byte      { return h[116:][:8] }