实现多商户履约平台基础

backend/internal/service/skin.go

@@ -17,12 +17,13 @@ func NewSkinService(db *gorm.DB) *SkinService {
 }
 
 type SkinListQuery struct {
-	Page     int
-	Size     int
-	Keyword  string
-	Game     string
-	Category string
-	Status   *int
+	MerchantID uint
+	Page       int
+	Size       int
+	Keyword    string
+	Game       string
+	Category   string
+	Status     *int
 }
 
 func (s *SkinService) List(q SkinListQuery) ([]model.Skin, int64, error) {
@@ -33,6 +34,9 @@ func (s *SkinService) List(q SkinListQuery) ([]model.Skin, int64, error) {
 		q.Size = 20
 	}
 	tx := s.db.Model(&model.Skin{})
+	if q.MerchantID != 0 {
+		tx = tx.Where("merchant_id = ?", q.MerchantID)
+	}
 	if q.Keyword != "" {
 		like := "%" + q.Keyword + "%"
 		tx = tx.Where("name LIKE ? OR sku LIKE ?", like, like)
@@ -55,9 +59,13 @@ func (s *SkinService) List(q SkinListQuery) ([]model.Skin, int64, error) {
 	return list, total, err
 }
 
-func (s *SkinService) Get(id uint) (*model.Skin, error) {
+func (s *SkinService) Get(merchantID, id uint) (*model.Skin, error) {
 	var skin model.Skin
-	if err := s.db.First(&skin, id).Error; err != nil {
+	tx := s.db.Where("id = ?", id)
+	if merchantID != 0 {
+		tx = tx.Where("merchant_id = ?", merchantID)
+	}
+	if err := tx.First(&skin).Error; err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errors.New("皮肤不存在")
 		}
@@ -70,8 +78,8 @@ func (s *SkinService) Create(skin *model.Skin) error {
 	return s.db.Create(skin).Error
 }
 
-func (s *SkinService) Update(id uint, updates map[string]interface{}) error {
-	res := s.db.Model(&model.Skin{}).Where("id = ?", id).Updates(updates)
+func (s *SkinService) Update(merchantID, id uint, updates map[string]interface{}) error {
+	res := s.db.Model(&model.Skin{}).Where("id = ? AND merchant_id = ?", id, merchantID).Updates(updates)
 	if res.Error != nil {
 		return res.Error
 	}
@@ -81,8 +89,8 @@ func (s *SkinService) Update(id uint, updates map[string]interface{}) error {
 	return nil
 }
 
-func (s *SkinService) Delete(id uint) error {
-	res := s.db.Delete(&model.Skin{}, id)
+func (s *SkinService) Delete(merchantID, id uint) error {
+	res := s.db.Where("merchant_id = ?", merchantID).Delete(&model.Skin{}, id)
 	if res.Error != nil {
 		return res.Error
 	}
@@ -94,12 +102,16 @@ func (s *SkinService) Delete(id uint) error {
 
 // SeedCatalog 按 sku 幂等导入商品目录（已存在则跳过）
 func (s *SkinService) SeedCatalog() error {
+	var merchant model.Merchant
+	if err := s.db.Where("code = ?", "self-operated").First(&merchant).Error; err != nil {
+		return err
+	}
 	// 清理早期无 sku 的演示数据，避免唯一索引冲突
-	_ = s.db.Where("sku = ? OR sku IS NULL", "").Delete(&model.Skin{}).Error
+	_ = s.db.Where("merchant_id = ? AND (sku = ? OR sku IS NULL)", merchant.ID, "").Delete(&model.Skin{}).Error
 
 	for _, item := range peaceEliteCatalog {
 		var existing model.Skin
-		err := s.db.Where("sku = ?", item.SKU).First(&existing).Error
+		err := s.db.Where("merchant_id = ? AND sku = ?", merchant.ID, item.SKU).First(&existing).Error
 		if err == nil {
 			// 已存在：仅同步默认佣金为 0（不改价格等业务字段）
 			if existing.Commission != 0 {
@@ -111,6 +123,7 @@ func (s *SkinService) SeedCatalog() error {
 			return err
 		}
 		skin := model.Skin{
+			MerchantID: merchant.ID,
 			Name:       item.Name,
 			SKU:        item.SKU,
 			Game:       "和平精英",