///

### 同一应用中同时使用 Pydantic v1 与 v2 { #pydantic-v1-and-v2-on-the-same-app }

Pydantic 不支持在一个 Pydantic v2 模型的字段中定义 Pydantic v1 模型，反之亦然。

```mermaid
graph TB
    subgraph "❌ Not Supported"
        direction TB
        subgraph V2["Pydantic v2 Model"]
            V1Field["Pydantic v1 Model"]
        end
        subgraph V1["Pydantic v1 Model"]
            V2Field["Pydantic v2 Model"]
        end

        SmbTreeHandleImpl tB = mock(SmbTreeHandleImpl.class);
        lenient().when(tA.acquire()).thenReturn(tA);
        lenient().when(tB.acquire()).thenReturn(tB);
        lenient().when(tA.getTreeId()).thenReturn(treeId);
        lenient().when(tB.getTreeId()).thenReturn(treeId);
        lenient().when(tA.isConnected()).thenReturn(true);
        lenient().when(tB.isConnected()).thenReturn(true);

// Returns an initialized setup for erasure tests.
func newErasureTestSetup(tb testing.TB, dataBlocks int, parityBlocks int, blockSize int64) (*erasureTestSetup, error) {
	diskPaths := make([]string, dataBlocks+parityBlocks)
	disks := make([]StorageAPI, len(diskPaths))
	var err error
	for i := range diskPaths {
		disks[i], diskPaths[i], err = newXLStorageTestSetup(tb)
		if err != nil {
			return nil, err
		}

///

### 同一アプリでの Pydantic v1 と v2 { #pydantic-v1-and-v2-on-the-same-app }

Pydantic v2 のモデルのフィールドに Pydantic v1 のモデルを（またはその逆を）埋め込むことは、Pydantic では「サポートされていません」。

```mermaid
graph TB
    subgraph "❌ Not Supported"
        direction TB
        subgraph V2["Pydantic v2 Model"]
            V1Field["Pydantic v1 Model"]
        end
        subgraph V1["Pydantic v1 Model"]
            V2Field["Pydantic v2 Model"]
        end

# Note that we must use nightly here as these are used in nightly jobs
# For release jobs, we will pin these on the release branch
keras-nightly ~= 3.12.0.dev
tb-nightly ~= 2.20.0.a
# For new protobuf, if V.x.y is gencode version, then runtime version U must be
# V <= U <= V+1
# More info at https://protobuf.dev/support/cross-version-runtime-guarantee/
protobuf >= 5.28.0, < 7.0

pkg testing, method (*F) Output() io.Writer #59928
pkg testing, method (*T) Attr(string, string) #43936
pkg testing, method (*T) Output() io.Writer #59928
pkg testing, type TB interface, Attr(string, string) #43936
pkg testing, type TB interface, Output() io.Writer #59928
pkg testing/fstest, method (MapFS) Lstat(string) (fs.FileInfo, error) #49580
pkg testing/fstest, method (MapFS) ReadLink(string) (string, error) #49580

But **FastAPI** will know that it has to solve `query_extractor` first, to pass the results of that to `query_or_cookie_extractor` while calling it.

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

                    1024L * 1024L * 1024L * 10L, // 10 GB
                    1024L * 1024L * 1024L * 100L, // 100 GB
                    1024L * 1024L * 1024L * 1024L, // 1 TB
                    1024L * 1024L * 1024L * 1024L * 10L // 10 TB
            };

            for (long size : typicalSizes) {
                TestAllocInfo allocInfo = new TestAllocInfo(size, size / 2);

        } else if (size.divide(ONE_TB_BI).compareTo(BigInteger.ZERO) > 0) {
            displaySize = new BigDecimal(size.divide(ONE_GB_BI)).divide(BigDecimal.valueOf(1000)) + "TB";
        } else if (size.divide(ONE_GB_BI).compareTo(BigInteger.ZERO) > 0) {
            displaySize = new BigDecimal(size.divide(ONE_MB_BI)).divide(BigDecimal.valueOf(1000)) + "GB";

    assertThat(xmlAttributeEscaper.escape("a\"b<c>d&e\"f'"))
        .isEqualTo("a&quot;b&lt;c&gt;d&amp;e&quot;f&apos;");
    // Test '\t', '\n' and '\r' are escaped.
    assertThat(xmlAttributeEscaper.escape("a\tb\nc\rd")).isEqualTo("a&#x9;b&#xA;c&#xD;d");
  }

  // Helper to assert common properties of xml escapers.
  static void assertBasicXmlEscaper(