first commit

internal/mysqldao/goods.go

@@ -0,0 +1,67 @@
+package mysqldao
+
+import (
+	"context"
+
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqlmodel"
+	"gorm.io/gorm"
+)
+
+// GoodsDao 商品数据访问
+type GoodsDao struct {
+	db *gorm.DB
+}
+
+// NewGoodsDao 创建商品 DAO
+func NewGoodsDao() *GoodsDao {
+	return &GoodsDao{db: global.MysqlEngine}
+}
+
+// GoodsGetByCode 按商品编码查询商品
+func (d *GoodsDao) GoodsGetByCode(ctx context.Context, code string) (*mysqlmodel.Goods, error) {
+	ctx, span := global.Tracer.Start(ctx, "mysqldao.GoodsGetByCode")
+	defer span.End()
+
+	var goods mysqlmodel.Goods
+	if err := d.db.WithContext(ctx).Where("goods_code = ?", code).First(&goods).Error; err != nil {
+		span.RecordError(err)
+		return nil, err
+	}
+	return &goods, nil
+}
+
+// GoodsGetByID 按主键 ID 查询商品
+func (d *GoodsDao) GoodsGetByID(ctx context.Context, id int64) (*mysqlmodel.Goods, error) {
+	ctx, span := global.Tracer.Start(ctx, "mysqldao.GoodsGetByID")
+	defer span.End()
+
+	var goods mysqlmodel.Goods
+	if err := d.db.WithContext(ctx).First(&goods, id).Error; err != nil {
+		span.RecordError(err)
+		return nil, err
+	}
+	return &goods, nil
+}
+
+// GoodsList 分页查询上架商品（goodsType 为 0 不筛选）
+func (d *GoodsDao) GoodsList(ctx context.Context, goodsType int8, page, pageSize int) ([]mysqlmodel.Goods, int64, error) {
+	ctx, span := global.Tracer.Start(ctx, "mysqldao.GoodsList")
+	defer span.End()
+
+	var list []mysqlmodel.Goods
+	var total int64
+	q := d.db.WithContext(ctx).Model(&mysqlmodel.Goods{}).Where("status = ?", int8(1))
+	if goodsType != 0 {
+		q = q.Where("goods_type = ?", goodsType)
+	}
+	if err := q.Count(&total).Error; err != nil {
+		span.RecordError(err)
+		return nil, 0, err
+	}
+	if err := q.Offset((page - 1) * pageSize).Limit(pageSize).Order("id DESC").Find(&list).Error; err != nil {
+		span.RecordError(err)
+		return nil, 0, err
+	}
+	return list, total, nil
+}