## 存档回调

实际的回调代码高度依赖于您自己的 API 应用。

并且可能每个应用都各不相同。

回调代码可能只有一两行，比如：

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
requests.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

但回调最重要的部分可能是，根据 API 要发送给回调请求体的数据等内容，确保您的 API 用户（外部开发者）正确地实现*外部 API*。

因此，我们下一步要做的就是添加代码，为从 API 接收回调的*外部 API*存档。

这部分文档在 `/docs` 下的 Swagger API 文档中显示，并且会告诉外部开发者如何构建*外部 API*。

& ⚫️ 🔜 🎲 🪀 📚 ⚪️➡️ 1️⃣ 📱 ⏭.

⚫️ 💪 1️⃣ ⚖️ 2️⃣ ⏸ 📟, 💖:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

✋️ 🎲 🏆 ⚠ 🍕 ⏲ ⚒ 💭 👈 👆 🛠️ 👩‍💻 (🔢 👩‍💻) 🛠️ *🔢 🛠️* ☑, 🛄 💽 👈 *👆 🛠️* 🔜 📨 📨 💪 ⏲, ♒️.

, ⚫️❔ 👥 🔜 ⏭ 🚮 📟 📄 ❔ 👈 *🔢 🛠️* 🔜 👀 💖 📨 ⏲ ⚪️➡️ *👆 🛠️*.

	}

	iv := DB.Table(`table_invoices`).Select(`seller, SUM(total) as total, SUM(paid) as paid, SUM(balance) as balance`).Group(`seller`)
	stmt = dryDB.Table(`table_employees`).Select(`id, name, iv.total, iv.paid, iv.balance`).Joins(`LEFT JOIN (?) AS iv ON iv.seller = table_employees.id`, iv).Scan(&user).Statement

It could be just one or two lines of code, like:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

Es könnten nur eine oder zwei Codezeilen sein, wie zum Beispiel:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

func ExampleDB_BeginTx() {
	tx, err := db.BeginTx(ctx, &sql.TxOptions{Isolation: sql.LevelSerializable})
	if err != nil {
		log.Fatal(err)
	}
	id := 37
	_, execErr := tx.Exec(`UPDATE users SET status = ? WHERE id = ?`, "paid", id)
	if execErr != nil {
		_ = tx.Rollback()
		log.Fatal(execErr)
	}
	if err := tx.Commit(); err != nil {
		log.Fatal(err)
	}
}

func ExampleConn_ExecContext() {

            }
            project(':b') {
                apply plugin: 'base'
                configurations {
                    foo.attributes { $freeRelease }
                    bar.attributes { $paid; $release }
                    'default' {
                        canBeConsumed = false
                    }
                }
                ${fooAndBarJars()}
            }
        """

                           attribute(usage)
                           attribute(flavor)
                        }
                        def buildTypes = ['debug', 'release']
                        def flavors = ['free', 'paid']
                        def processResources = p.tasks.processResources
                        buildTypes.each { bt ->
                            flavors.each { f ->

        conf.getAttributes().attribute(flavor, new FlavorImpl(name: 'free'))

        when:
        conf.getAttributes().attribute(flavor, new FlavorImpl(name: 'paid'))

        then:
        conf.attributes.getAttribute(flavor).name == 'paid'
    }

    def "can have two attributes with the same type but different names"() {
        def conf = conf()

//	    return func (db *gorm.DB) *gorm.DB {
//	        return db.Scopes(AmountGreaterThan1000).Where("status in (?)", status)
//	    }
//	}
//
//	db.Scopes(AmountGreaterThan1000, OrderStatus([]string{"paid", "shipped"})).Find(&orders)
func (db *DB) Scopes(funcs ...func(*DB) *DB) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.scopes = append(tx.Statement.scopes, funcs...)
	return tx
}