在GORM中,你可以使用Create
方法進(jìn)行批量插入,使用Save
或Updates
方法進(jìn)行批量更新。下面是具體的示例:
package main
import (
"fmt"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
type User struct {
ID uint
Name string
Age int
}
func main() {
// 初始化數(shù)據(jù)庫(kù)連接
db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
if err != nil {
panic("failed to connect database")
}
// 遷移 schema
db.AutoMigrate(&User{})
// 創(chuàng)建一個(gè)用戶切片
users := []User{
{Name: "John", Age: 25},
{Name: "Jane", Age: 30},
{Name: "Tom", Age: 35},
}
// 批量插入數(shù)據(jù)
result := db.Create(&users)
if result.Error != nil {
fmt.Println("Error occurred while bulk inserting data:", result.Error)
} else {
fmt.Println("Bulk insertion successful")
}
}
package main
import (
"fmt"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
type User struct {
ID uint
Name string
Age int
}
func main() {
// 初始化數(shù)據(jù)庫(kù)連接
db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
if err != nil {
panic("failed to connect database")
}
// 遷移 schema
db.AutoMigrate(&User{})
// 創(chuàng)建一個(gè)用戶切片
users := []User{
{ID: 1, Name: "John", Age: 26},
{ID: 2, Name: "Jane", Age: 31},
{ID: 3, Name: "Tom", Age: 36},
}
// 批量更新數(shù)據(jù)
for _, user := range users {
result := db.Model(&User{}).Where("id = ?", user.ID).Updates(user)
if result.Error != nil {
fmt.Printf("Error occurred while updating user with ID %d: %v\n", user.ID, result.Error)
} else {
fmt.Printf("User with ID %d updated successfully\n", user.ID)
}
}
}
注意:在執(zhí)行批量操作時(shí),請(qǐng)確保你的數(shù)據(jù)庫(kù)支持批量插入和更新。例如,SQLite在默認(rèn)情況下不支持批量插入,但你可以通過設(shè)置_busy_timeout
來解決這個(gè)問題。對(duì)于其他數(shù)據(jù)庫(kù),如MySQL和PostgreSQL,它們通常都支持批量操作。