增加删除原料校验

internal/domain/recipe/raw_material_service.go

@@ -24,6 +24,7 @@ var (
 	ErrRawMaterialNameConflict  = fmt.Errorf("原料名称已存在")
 	ErrRawMaterialNotFound      = fmt.Errorf("原料不存在")
 	ErrStockNotEmpty            = fmt.Errorf("原料尚有库存,无法删除")
+	ErrRawMaterialInUseByRecipe = fmt.Errorf("原料已被配方使用，无法删除")
 )
 
 // RawMaterialService 定义了原料领域的核心业务服务接口
@@ -138,6 +139,15 @@ func (s *rawMaterialServiceImpl) DeleteRawMaterial(ctx context.Context, id uint3
 		return ErrStockNotEmpty
 	}
 
+	// 检查原料是否被配方使用
+	isUsed, err := s.rawMaterialRepo.IsRawMaterialUsedInRecipes(serviceCtx, id)
+	if err != nil {
+		return fmt.Errorf("检查原料是否被配方使用失败: %w", err)
+	}
+	if isUsed {
+		return ErrRawMaterialInUseByRecipe
+	}
+
 	if err := s.rawMaterialRepo.DeleteRawMaterial(serviceCtx, id); err != nil {
 		return fmt.Errorf("删除原料失败: %w", err)
 	}

internal/infra/repository/raw_material_repository.go

@@ -41,6 +41,7 @@ type RawMaterialRepository interface {
 	DeleteRawMaterial(ctx context.Context, id uint32) error
 	DeleteNutrientsByRawMaterialIDTx(ctx context.Context, db *gorm.DB, rawMaterialID uint32) error
 	CreateBatchRawMaterialNutrientsTx(ctx context.Context, db *gorm.DB, nutrients []models.RawMaterialNutrient) error
+	IsRawMaterialUsedInRecipes(ctx context.Context, rawMaterialID uint32) (bool, error)
 
 	// 库存日志相关方法
 	CreateRawMaterialStockLog(ctx context.Context, log *models.RawMaterialStockLog) error
@@ -329,3 +330,16 @@ func (r *gormRawMaterialRepository) ListStockLogs(ctx context.Context, opts Stoc
 
 	return logs, total, nil
 }
+
+// IsRawMaterialUsedInRecipes 检查原料是否被任何配方使用
+func (r *gormRawMaterialRepository) IsRawMaterialUsedInRecipes(ctx context.Context, rawMaterialID uint32) (bool, error) {
+	repoCtx := logs.AddFuncName(ctx, r.ctx, "IsRawMaterialUsedInRecipes")
+	var count int64
+	err := r.db.WithContext(repoCtx).Model(&models.RecipeIngredient{}).
+		Where("raw_material_id = ?", rawMaterialID).
+		Count(&count).Error
+	if err != nil {
+		return false, fmt.Errorf("查询原料是否被配方使用失败: %w", err)
+	}
+	return count > 0, nil
+}