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dao.go
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dao.go
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package dao
import (
"fmt"
"strings"
"github.com/jinzhu/gorm"
"github.com/moocss/chi-webserver/src/config"
"github.com/moocss/chi-webserver/src/model"
"github.com/moocss/chi-webserver/src/pkg/log"
"github.com/moocss/chi-webserver/src/storer"
)
// Dao 对象
type Dao struct {
ORM *gorm.DB
DB *storer.DB
}
// New 实例化
func New(cfg *config.Config) *Dao {
DbInstance := storer.NewDB(cfg.Db)
if err := DbInstance.Open(); err != nil {
panic(err)
}
dao := &Dao{
DB: DbInstance,
ORM: DbInstance.Self,
}
return dao
}
// Create 数据添加
func (dao *Dao) Create(tableName string, data interface{}) bool {
//tx := dao.ORM.Begin()
//db := tx.Table(dao.setTableName(tableName)).Create(data)
//if err := db.Error; err != nil {
// tx.Rollback()
// log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
// return false
//}
//tx.Commit()
//return true
db := dao.ORM.Table(dao.setTableName(tableName)).Create(data)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// FindMulti 数据复合查询
func (dao *Dao) FindMulti(tableName string, data interface{}, query *model.QueryParam) bool {
db := dao.ORM.Table(dao.setTableName(tableName)).Offset(query.Offset)
if query.Limit > 0 {
db = db.Limit(query.Limit)
}
if query.Fields != "" {
db = db.Select(query.Fields)
}
if query.Order != "" {
db = db.Order(query.Order)
}
db = parseWhereParam(db, query.Where)
db.Find(data)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// Count 统计某条件字段的条目数
func (dao *Dao) Count(tableName string, count *int, query *model.QueryParam) bool {
db := dao.ORM.Table(dao.setTableName(tableName))
db = parseWhereParam(db, query.Where)
db = db.Count(count)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// FindOne 根据某一字段查询数据
func (dao *Dao) FindOne(tableName string, data interface{}, query *model.QueryParam) bool {
db := dao.ORM.Table(dao.setTableName(tableName))
if query.Fields != "" {
db = db.Select(query.Fields)
}
db = parseWhereParam(db, query.Where)
db = db.First(data)
if err := db.Error; err != nil && !db.RecordNotFound() {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// FindById 根据ID查询数据
func (dao *Dao) FindById(tableName string, data interface{}, id interface{}) bool {
db := dao.ORM.Table(dao.setTableName(tableName))
db.First(data, id)
if err := db.Error; err != nil && !db.RecordNotFound() {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// Update 更新数据
func (dao *Dao) Update(tableName string, data interface{}, query *model.QueryParam) bool {
db := dao.ORM.Table(dao.setTableName(tableName))
db = parseWhereParam(db, query.Where)
db = db.Updates(data)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// Delete 删除数据
func (dao *Dao) Delete(tableName string, data interface{}, query *model.QueryParam) bool {
if len(query.Where) == 0 {
log.Warn("mysql query error: delete failed, where conditions cannot be empty")
return false
}
db := dao.ORM.Table(dao.setTableName(tableName))
db = parseWhereParam(db, query.Where)
db = db.Delete(data)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// DeleteById 更加ID删除数据
func (dao *Dao) DeleteById(tableName string, data interface{}) bool {
db := dao.ORM.Table(dao.setTableName(tableName))
db.Delete(data)
if err := db.Error; err != nil {
log.Warn("mysql query error: %v, sql[%v]", err, db.QueryExpr())
return false
}
return true
}
// Where 条件拼装
func parseWhereParam(db *gorm.DB, where []model.WhereParam) *gorm.DB {
if len(where) == 0 {
return db
}
var (
plain []string
prepare []interface{}
)
for _, w := range where {
tag := w.Tag
if tag == "" {
tag = "="
}
var plainFmt string
switch tag {
case "IN":
plainFmt = fmt.Sprintf("%s IN (?)", w.Field)
default:
plainFmt = fmt.Sprintf("%s %s ?", w.Field, tag)
}
plain = append(plain, plainFmt)
prepare = append(prepare, w.Prepare)
}
return db.Where(strings.Join(plain, " AND "), prepare...)
}
// setTableName 给数据表拼接前缀
func (dao *Dao) setTableName(rawName string) string {
return strings.Join([]string{
dao.DB.GetTablePrefix(),
rawName,
}, "")
}