golang 批量插入数据

使用gorm框架插入数据的时候，官方没有现成的批量插入方法，可通过自己拼接sql语句，执行原生sql来实现

实现代码

func (c *SalesDay)BatchSave(dataSlice []interface{}) (interface{}, error) {
    var buffer bytes.Buffer
    createTime := time.Now()
    sql := fmt.Sprintf("insert into `%s` (`book_id`,`date`,`create_time`,`update_time`) values", c.TableName())
    if _, err := buffer.WriteString(sql); err != nil {
        return "", err
    }
    for i, e := range dataSlice {
        info := e.(map[string]interface{})
        if i == len(dataSlice)-1 {
            buffer.WriteString(fmt.Sprintf(`("%s","%s",""%s","%s");`,
                info["bookId"], info["statDate"], createTime, createTime))
        } else {
            buffer.WriteString(fmt.Sprintf(`("%s","%s","%s","%s"),`,
                info["bookId"], info["statDate"], createTime, createTime))
        }
    }
    ctx := context.Background()
    mysql := db.Single.Mysql(c.client).WithContext(ctx, zymysql.Master()).Exec(buffer.String())
    fmt.Println(mysql.Error)
    if mysql.Error != nil {
        return "", mysql.Error
    }
    return "", nil
}