err = ErrBufferFull
		}
	}
	return b.buf[b.r : b.r+n], err
}

// Discard skips the next n bytes, returning the number of bytes discarded.
//
// If Discard skips fewer than n bytes, it also returns an error.
// If 0 <= n <= b.Buffered(), Discard is guaranteed to succeed without
// reading from the underlying io.Reader.
func (b *Reader) Discard(n int) (discarded int, err error) {
	if n < 0 {
		return 0, ErrNegativeCount
	}

	var r T
	err = c.g.apply(ctx).Model(r).Select(column).Count(&result).Error
	return
}

func (c chainG[T]) Build(builder clause.Builder) {
	subdb := c.getInstance()
	subdb.Logger = logger.Discard
	subdb.DryRun = true

	if stmt, ok := builder.(*Statement); ok {
		if subdb.Statement.SQL.Len() > 0 {
			var (
				vars = subdb.Statement.Vars
				sql  = subdb.Statement.SQL.String()
			)

				writer.WriteByte(')')
			} else {
				writer.WriteString("(NULL)")
			}
		case interface{ getInstance() *DB }:
			cv := v.getInstance()

			subdb := cv.Session(&Session{Logger: logger.Discard, DryRun: true}).getInstance()
			if cv.Statement.SQL.Len() > 0 {
				var (
					vars = subdb.Statement.Vars
					sql  = cv.Statement.SQL.String()
				)

## Подключиться к чату

Подключайтесь к  👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank"> чату в Discord</a> 👥 и общайтесь с другими участниками сообщества FastAPI.

/// tip | Подсказка

  mdx_include: null
  markdown_include_variants: null
extra:
  social:
  - icon: fontawesome/brands/github-alt
    link: https://github.com/fastapi/fastapi
  - icon: fontawesome/brands/discord
    link: https://discord.gg/VQjSZaeJmf
  - icon: fontawesome/brands/twitter
    link: https://x.com/fastapi
  - icon: fontawesome/brands/linkedin
    link: https://www.linkedin.com/company/fastapi

* Para propor novas seções na documentação.
* Para corrigir um bug/questão.
* Para adicionar um novo recurso.

## Entre no chat

Entre no 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">server de conversa do Discord</a> 👥 e conheça novas pessoas da comunidade
do FastAPI.

/// tip | Dica

## Beim Chat mitmachen

Treten Sie dem 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">Discord-Chatserver</a> 👥 bei und treffen Sie sich mit anderen Mitgliedern der FastAPI-Community.

/// tip | Tipp

Si puedes ayudarme con eso, **me estás ayudando a mantener FastAPI** y asegurando que siga **avanzando más rápido y mejor**. 🚀

## Únete al chat

Únete al servidor de chat 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">Discord</a> 👥 y charla con otros en la comunidad de FastAPI.

/// tip | Consejo

If you can help me with that, **you are helping me maintain FastAPI** and making sure it keeps **advancing faster and better**. 🚀

## Join the chat { #join-the-chat }

Join the 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">Discord chat server</a> 👥 and hang out with others in the FastAPI community.

/// tip

👈 2️⃣ 📋 ⚫️❔ **🍴 🕰 🏆**. 👈 👑 👷 🏆 FastAPI.

🚥 👆 💪 ℹ 👤 ⏮️ 👈, **👆 🤝 👤 🚧 FastAPI** & ⚒ 💭 ⚫️ 🚧 **🛠️ ⏩ & 👻**. 👶

## 🛑 💬

🛑 👶 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">😧 💬 💽</a> 👶 &amp; 🤙 👅 ⏮️ 🎏 FastAPI 👪.

/// tip