RequiredParam = PydanticUndefined
Undefined = PydanticUndefined
UndefinedType = PydanticUndefinedType
evaluate_forwardref = eval_type_lenient
Validator = Any

# TODO: remove when dropping support for Pydantic < v2.12.3
_Attrs = {
    "default": ...,
    "default_factory": None,
    "alias": None,
    "alias_priority": None,
    "validation_alias": None,
    "serialization_alias": None,
    "title": None,

Klaus Post <******@****.***> 1739812182 -0800

}

// Return signature-v2 for the presigned request.
func preSignatureV2(cred auth.Credentials, method string, encodedResource string, encodedQuery string, headers http.Header, expires string) string {
	stringToSign := getStringToSignV2(method, encodedResource, encodedQuery, headers, expires)
	return calculateSignatureV2(stringToSign, cred.SecretKey)
}

// Return the signature v2 of a given request.

talkpython-v2.jpg...

	bucketCollector         *minioBucketCollector
	peerMetricsGroups       []*MetricsGroupV2
	bucketPeerMetricsGroups []*MetricsGroupV2
)

// v2MetricsMaxBuckets enforces a bucket count limit on metrics for v2 calls.
// If people hit this limit, they should move to v3, as certain calls explode with high bucket count.
const v2MetricsMaxBuckets = 100

func init() {
	clusterMetricsGroups := []*MetricsGroupV2{

# Von Pydantic v1 zu Pydantic v2 migrieren { #migrate-from-pydantic-v1-to-pydantic-v2 }

Wenn Sie eine ältere FastAPI-App haben, nutzen Sie möglicherweise Pydantic Version 1.

FastAPI Version 0.100.0 unterstützte sowohl Pydantic v1 als auch v2. Es verwendete, was auch immer Sie installiert hatten.

FastAPI Version 0.119.0 führte eine teilweise Unterstützung für Pydantic v1 innerhalb von Pydantic v2 (als `pydantic.v1`) ein, um die Migration zu v2 zu erleichtern.

package cmd

import (
	"bytes"
	"encoding/binary"
	"encoding/hex"
	"errors"
	"fmt"
	"io"
	"sort"
	"strings"
	"time"

	"github.com/cespare/xxhash/v2"
	"github.com/google/uuid"
	jsoniter "github.com/json-iterator/go"
	"github.com/minio/minio/internal/bpool"
	"github.com/minio/minio/internal/bucket/lifecycle"
	"github.com/minio/minio/internal/bucket/replication"

///

### Pydantic v1 и v2 в одном приложении { #pydantic-v1-and-v2-on-the-same-app }

В Pydantic **не поддерживается** ситуация, когда в одной модели Pydantic v2 используются поля, определённые как модели Pydantic v1, и наоборот.

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

# 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.

Klaus Post <******@****.***> 1759093161 +0200