///

## 表单的 Pydantic 模型

您只需声明一个 **Pydantic 模型**，其中包含您希望接收的**表单字段**，然后将参数声明为 `Form` :

{* ../../docs_src/request_form_models/tutorial001_an_py39.py hl[9:11,15] *}

**FastAPI** 将从请求中的**表单数据**中**提取**出**每个字段**的数据，并提供您定义的 Pydantic 模型。

## 检查文档

您可以在文档 UI 中验证它，地址为 `/docs` ：

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## 禁止额外的表单字段

		if !isErrReadQuorum(err) {
			t.Errorf("Expected read quorum error when if-none-match is used with quorum failure, got: %v", err)
		}
	})

	t.Run("if-match with read quorum failure", func(t *testing.T) {
		// Test Case 2: if-match (update only if ETag matches)
		// With if-match: <etag>, this should only succeed if object exists with matching ETag.
		// Since read quorum fails, we can't determine if object exists or ETag matches.

FORM...

	wResources := make([]string, 1000)
	rResources := make([]string, 1000)
	quorum := 0
	l := newLocker()
	ctx := t.Context()
	for i := range wResources {
		arg := dsync.LockArgs{
			UID:       mustGetUUID(),
			Resources: []string{mustGetUUID()},
			Source:    t.Name(),
			Owner:     "owner",
			Quorum:    &quorum,
		}
		ok, err := l.Lock(ctx, arg)
		if err != nil {
			t.Fatal(err)
		}
		if !ok {

	tolerance := len(restClnts) / 2

	// Quorum is effectively = total clients subtracted with tolerance limit
	quorum := len(restClnts) - tolerance
	if !isReadLock {
		// In situations for write locks, as a special case
		// to avoid split brains we make sure to acquire
		// quorum + 1 when tolerance is exactly half of the
		// total locker clients.
		if quorum == tolerance {
			quorum++
		}
	}

Krishnan Parthasarathi <******@****.***> 1725619883 -0700

## Cluster probe

### Cluster-writeable probe

The reply is '200 OK' if cluster has write quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1
X-Minio-Write-Quorum: 3
X-Amz-Request-Id: 16239D6AB80EBECF
X-Xss-Protection: 1; mode=block

// GetValueWithQuorum returns the first key which occurs >= quorum number of times.
func (c counterMap[T]) GetValueWithQuorum(quorum int) (T, bool) {
	var zero T
	for x, count := range c {
		if count >= quorum {
			return x, true
		}
	}
	return zero, false
}

// figure out the most commonVersions across disk that satisfies
// the 'writeQuorum' this function returns "" if quorum cannot

		for i, client := range sys.peerClients {
			if slices.Contains(client.GetPools(), poolIdx) {
				perPoolErrs = append(perPoolErrs, errs[i])
			}
		}
		quorum := len(perPoolErrs) / 2
		poolErrs = append(poolErrs, reduceWriteQuorumErrs(ctx, perPoolErrs, bucketOpIgnoredErrs, quorum))
	}

	if !opts.Recreate {
		// when there is no force recreate look for pool
		// errors to recreate the bucket on all pools.

	Owner string

	// Source contains the line number, function and file name of the code
	// on the client node that requested the lock.
	Source string `msgp:"omitempty"`

	// Quorum represents the expected quorum for this lock type.
	Quorum *int `msgp:"omitempty"`
}

// ResponseCode is the response code for a locking request.
type ResponseCode uint8

// Response codes for a locking request.
const (