/
frequent.go
162 lines (138 loc) · 3.3 KB
/
frequent.go
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package main
import (
"fmt"
"log"
"strings"
"time"
"gorm.io/driver/mysql"
"gorm.io/gorm"
"gorm.io/gorm/clause"
)
func GetDB() (*gorm.DB, error) {
dsn := "root:root@tcp(127.0.0.1:3306)/demo?charset=utf8mb4&parseTime=True&loc=Local"
return gorm.Open(mysql.Open(dsn), &gorm.Config{})
}
func Query() error {
type PidItem struct {
Uid string
Platform string
Account string
Pid string
WeiboName string
}
var (
pids []*PidItem
querysql = fmt.Sprintf(`select uid, platform, account, pid, weibo_name from ho_pids where status = '%s' and default_flag = %d`, "available", 1)
)
db, _ := GetDB()
if err := db.Raw(querysql).Scan(&pids).Error; err != nil {
return fmt.Errorf("query err: %s", err)
}
return nil
}
type Xxx struct {
Id uint64
Date time.Time
Category string
CreatedAt time.Time
UpdatedAt time.Time
}
func BatchInsert(data map[string]*Xxx) {
var insertFields = []string{
"date",
"category",
"created_at",
"updated_at",
}
insertSqlTemplate := fmt.Sprintf("insert into xxx(`%s`) values", strings.Join(insertFields, "`, `"))
batch := make([]string, 0)
for _, item := range data {
row := []string{
item.Date.Format("2006-01-02"),
item.Category,
item.CreatedAt.Format("2006-01-02 15:04:05"),
item.UpdatedAt.Format("2006-01-02 15:04:05"),
}
temp := fmt.Sprintf("('%s')", strings.Join(row, "', '"))
batch = append(batch, temp)
}
log.Printf("len = %d", len(batch))
if len(batch) == 0 {
log.Fatal("batch empty")
}
sql := fmt.Sprintf(insertSqlTemplate, strings.Join(batch, `, `))
log.Printf("sql: %s", sql)
db, _ := GetDB()
res := db.Exec(sql)
if res.Error != nil {
log.Fatalf("sql err: %s", res.Error)
}
log.Printf("affected %d", res.RowsAffected)
}
func Update(ids []int) {
now := time.Now()
upts := map[string]interface{}{
"category": "xx",
"updated_at": now.Format("2006-01-02 15:04:05"),
}
db, _ := GetDB()
res := db.Model(&Xxx{}).Where("id in ?", ids).UpdateColumns(upts)
if err := res.Error; err != nil {
log.Fatalf("ids update err: %v", err)
}
log.Printf("db affected %d", res.RowsAffected)
}
func Upsert(data []map[string]interface{}) {
db, _ := GetDB()
err := db.Transaction(func(tx *gorm.DB) error {
if err := tx.Clauses(clause.OnConflict{
Columns: []clause.Column{
// 重复的字段
{Name: "date"},
{Name: "category"},
{Name: "created_at"},
{Name: "updated_at"},
},
DoUpdates: clause.AssignmentColumns([]string{
"category",
"updated_at",
}),
}).CreateInBatches(&data, len(data)).Error; err != nil {
return err
}
return nil
})
if err != nil {
log.Fatalf("items db trans err: %v", err)
}
}
func Delete(date string) error {
sql := fmt.Sprintf(`delete from xxx where date = "%s"`, date)
db, _ := GetDB()
if err := db.Exec(sql).Error; err != nil {
return err
}
return nil
}
func Transaction() {
db, _ := GetDB()
err := db.Transaction(func(tx *gorm.DB) error {
Delete("2023-01-01")
return nil
})
if err != nil {
log.Fatalf("db transaction err: %s", err)
}
}
// 实现 MarshalJSON 方法
func (u *User) MarshalJSON() ([]byte, error) {
type Alias User // 定义别名
return json.Marshal(&struct {
CreatedAt time.Time `json:"created_at"`
*Alias // 使用别名
}{
CreatedAt: u.CreatedAt.Local(),
Alias: (*Alias)(u),
})
}
func main() {}