smart_canteen/app/db/db_banner.go

package db

import (
	"applet/app/db/model"
	"applet/app/utils/logx"
	"reflect"
	"xorm.io/xorm"
)

type BannerDb struct {
	Db *xorm.Engine `json:"db"`
}

func (bannerDb *BannerDb) Set() { // set方法
	bannerDb.Db = Db
}

func (bannerDb *BannerDb) GetBanner(id int) (m *model.Banner, err error) {
	m = new(model.Banner)
	has, err := bannerDb.Db.Where("id =?", id).Get(m)
	if err != nil {
		return nil, logx.Error(err)
	}
	if has == false {
		return nil, nil
	}
	return m, nil
}

func (bannerDb *BannerDb) FindBannerById(ids interface{}) (*[]model.Banner, error) {
	var m []model.Banner
	if err := bannerDb.Db.In("id", ids).Desc("sort").Find(&m); err != nil {
		return nil, logx.Error(err)
	}
	return &m, nil
}

func (bannerDb *BannerDb) FindBanner(limit, start int) (*[]model.Banner, error) {
	var m []model.Banner
	if limit == 0 || start == 0 {
		if err := bannerDb.Db.Desc("sort").Find(&m); err != nil {
			return nil, logx.Error(err)
		}
	} else {
		if err := bannerDb.Db.Desc("sort").Limit(limit, start).Find(m); err != nil {
			return nil, logx.Error(err)
		}
	}
	return &m, nil
}

func (bannerDb *BannerDb) GetBannerByName(name string) (m *model.Banner, err error) {
	m = new(model.Banner)
	has, err := bannerDb.Db.Where("name =?", name).Get(m)
	if err != nil {
		return nil, logx.Error(err)
	}
	if has == false {
		return nil, nil
	}
	return m, nil
}

func (bannerDb *BannerDb) BannerInsert(m *model.Banner) (int, error) {
	_, err := bannerDb.Db.InsertOne(m)
	if err != nil {
		return 0, err
	}
	return m.Id, nil
}

func (bannerDb *BannerDb) BannerUpdate(m *model.Banner, columns ...string) (int64, error) {
	affected, err := bannerDb.Db.Where("id =?", m.Id).Cols(columns...).Update(m)
	if err != nil {
		return 0, err
	}
	return affected, nil
}

func (bannerDb *BannerDb) BannerDelete(id interface{}) (int64, error) {
	if reflect.TypeOf(id).Kind() == reflect.Slice {
		return Db.In("id", id).Delete(model.Banner{})
	} else {
		return Db.Where("id = ?", id).Delete(model.Banner{})
	}
}