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db.go
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db.go
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package db
import (
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"gorm.io/gorm/logger"
"time"
)
// 数据库配置
type Config struct {
Driver string `yaml:"driver"`
Url string `yaml:"url"`
IdleConn int `yaml:"idle_conn"`
OpenConn int `yaml:"open_conn"`
MaxLifetime int `yaml:"max_lifetime"`
}
type Engine struct {
DB *gorm.DB
isClone bool
}
func NewEngine(conf *Config) (*Engine, error) {
dsn := conf.Url
var db *gorm.DB
var err error
switch conf.Driver {
case "postgres":
db, err = gorm.Open(postgres.Open(dsn), &gorm.Config{
SkipDefaultTransaction: true,
CreateBatchSize: 200,
// Logger: logger.Default.LogMode(logger.Info), //调试打印所有日志
Logger: logger.Default.LogMode(logger.Warn),
})
case "sqlite":
db, err = gorm.Open(sqlite.Open(dsn), &gorm.Config{
SkipDefaultTransaction: true,
CreateBatchSize: 200,
// Logger: logger.Default.LogMode(logger.Info), //调试打印所有日志
Logger: logger.Default.LogMode(logger.Warn),
})
case "mysql":
db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
SkipDefaultTransaction: true,
CreateBatchSize: 200,
// Logger: logger.Default.LogMode(logger.Info), //调试打印所有日志
Logger: logger.Default.LogMode(logger.Warn),
})
}
if err != nil {
return nil, err
}
sqlDB, err := db.DB()
if err != nil {
return nil, err
}
sqlDB.SetMaxIdleConns(conf.IdleConn)
sqlDB.SetMaxOpenConns(conf.OpenConn)
sqlDB.SetConnMaxLifetime(time.Duration(conf.MaxLifetime) * time.Second)
return &Engine{
DB: db,
}, nil
}
// X系列函数 使用简便的链式调用
func (e *Engine) XModel(value interface{}) *Engine {
return &Engine{
DB: e.DB.Model(value),
isClone: true,
}
}
func (e *Engine) XWhere(query interface{}, args ...interface{}) *Engine {
if e.isClone {
e.DB = e.DB.Where(query, args...)
return e
}
return &Engine{
DB: e.DB.Where(query, args...),
isClone: true,
}
}
func (e *Engine) XWithPage(page, pageSize int) *Engine {
if e.isClone {
e.DB = e.DB.Offset((page - 1) * pageSize).Limit(pageSize)
return e
}
return &Engine{
DB: e.DB.Offset((page - 1) * pageSize).Limit(pageSize),
isClone: true,
}
}
func (e *Engine) XOrder(sort string) *Engine {
if len(sort) == 0 {
return e
}
if e.isClone {
e.DB = e.DB.Order(sort)
return e
}
return &Engine{
DB: e.DB.Order(sort),
isClone: true,
}
}
func (e *Engine) XCount() (int, error) {
var count int64
err := e.DB.Count(&count).Error
return int(count), err
}
func (e *Engine) XCount64() (int64, error) {
var count int64
err := e.DB.Count(&count).Error
return count, err
}
func (e *Engine) XMapList() ([]map[string]interface{}, error) {
res := make([]map[string]interface{}, 0, 50)
err := e.DB.Find(&res).Error
if err != nil {
return nil, err
}
return res, nil
}
func (e *Engine) XMapFirst() ([]map[string]interface{}, error) {
res := make([]map[string]interface{}, 0, 50)
err := e.DB.First(&res).Error
if err != nil {
return nil, err
}
return res, nil
}