/// tip | Порада

Pydantic також має [`BeforeValidator`](https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator) та інші. 🤓

///

	// Calculate aggregate avg bandwidth and exp window avg
	m.lock.Lock()
	defer func() {
		m.startTime = endTime
		m.lock.Unlock()
	}()

	if m.startTime.IsZero() {
		return
	}

	if endTime.Before(m.startTime) {
		return
	}

	duration := endTime.Sub(m.startTime)

	bytesSinceLastWindow := atomic.SwapUint64(&m.bytesSinceLastWindow, 0)

	if m.expMovingAvg == 0 {

word_by_word_montgomery --lang Go --cmovznz-by-mul --relax-primitive-carry-to-bitwidth 32,64 --public-function-case camelCase --public-type-case camelCase --private-function-case camelCase --private-type-case camelCase --doc-text-before-function-name '' --doc-newline-before-package-declaration --doc-prepend-header 'Code generated by Fiat Cryptography. DO NOT EDIT.' --package-name edwards25519 Scalar 64 '2^252 + 27742317777372353535' mul add sub opp nonzero from_montgomery to_montgomery to_bytes from_bytes...

    <RequestProgress>
        <Enabled>FALSE</Enabled>
    </RequestProgress>
	<ScanRange><Start>56</Start><End>76</End></ScanRange>
</SelectObjectContentRequest>`),
		},
		{
			name:  "error-end-before-start",
			input: testInput,
			// Since we are doing offset, no headers are used.
			wantResult: ``,
			wantErr:    true,
			requestXML: []byte(`<?xml version="1.0" encoding="UTF-8"?>

///

## Schritte vor dem Start { #previous-steps-before-starting }

Es gibt viele Fälle, in denen Sie, **bevor Sie Ihre Anwendung starten**, einige Schritte ausführen möchten.

Beispielsweise möchten Sie möglicherweise **Datenbankmigrationen** ausführen.

Container image'ları, Docker, Kubernetes vb. konuları ilerideki bir bölümde daha detaylı anlatacağım: [Container'larda FastAPI - Docker](docker.md).

///

## Başlatmadan Önceki Adımlar { #previous-steps-before-starting }

Uygulamanızı **başlatmadan önce** bazı adımlar yapmak isteyeceğiniz birçok durum vardır.

Örneğin **database migrations** çalıştırmak isteyebilirsiniz.

/// tip | Совет

В Pydantic также есть [`BeforeValidator`](https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator) и другие. 🤓

///

/// tip | Tipp

Pydantic unterstützt auch [`BeforeValidator`](https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator) und andere. 🤓

///

/// tip | İpucu

Pydantic’te [`BeforeValidator`](https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator) ve başka validator’lar da vardır. 🤓

///

/// tip | 提示

Pydantic 也有 [`BeforeValidator`](https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator) 等等。🤓

///