1/trading-go/model/category.go

package model

import "trading-go/common"

type Category struct {
	Id   uint   `db:"id"`
	Name string `db:"name"`
	Pic  string `db:"pic"`
}

type CategoryJson struct {
	Name string `json:"name"`
	Pic  string `json:"pic"`
}

type CategoryOfGoods struct {
	Id         uint `db:"id"`
	GoodsId    uint `db:"goods_id"`
	CategoryId uint `db:"category_id"`
}

func (j CategoryJson) Change() Category {
	return Category{
		Name: j.Name,
		Pic:  j.Pic,
	}
}

func (c Category) GetAll() (categories []Category, err error) {
	db := common.DB
	sqlStr := "SELECT * FROM categories"
	err = db.Select(&categories, sqlStr)
	return
}

func (c Category) Create() error {
	db := common.DB
	sqlStr := "INSERT INTO categories(name, pic) VALUES(:name, :pic)"
	_, err := db.NamedExec(sqlStr, c)
	return err
}

func (c Category) Delete() error {
	db := common.DB
	sqlStr := "DELETE FROM categories WHERE id = ?"
	_, err := db.Exec(sqlStr, c.Id)
	return err
}

func (g CategoryOfGoods) Save(id uint, categories []uint) error {
	db := common.DB
	sqlStr := "INSERT INTO category_of_goods(goods_id, category_id) VALUES (?, ?)"
	for _, category := range categories {
		_, err := db.Exec(sqlStr, id, category)
		if err != nil {
			return err
		}
	}
	return nil
}