pig-farm-controller/internal/infra/models/recipe.go

package models

// Recipe 配方模型
type Recipe struct {
	Model
	Name        string `gorm:"size:100;not null;comment:配方名称"`
	Description string `gorm:"size:255;comment:配方描述"`
	// RecipeIngredients 关联此配方的所有原料组成
	RecipeIngredients []RecipeIngredient `gorm:"foreignKey:RecipeID"`
}

func (Recipe) TableName() string {
	return "recipes"
}

// CalculateTotalRawMaterialProportion 计算配方中所有原料的总比例
func (r Recipe) CalculateTotalRawMaterialProportion() float32 {
	var totalPercentage float32
	for _, ingredient := range r.RecipeIngredients {
		totalPercentage += ingredient.Percentage
	}
	return totalPercentage
}

// CalculateReferencePricePerKilogram 根据原料参考价计算配方每公斤的成本
func (r Recipe) CalculateReferencePricePerKilogram() float32 {
	var totalCost float32
	for _, ingredient := range r.RecipeIngredients {
		// 确保 RawMaterial 已经被加载
		if ingredient.RawMaterial.ID == 0 {
			return 0.0
		}
		totalCost += ingredient.RawMaterial.ReferencePrice * ingredient.Percentage
	}
	return totalCost
}

// RecipeIngredient 配方原料组成模型
type RecipeIngredient struct {
	Model
	RecipeID      uint32      `gorm:"not null;comment:关联的配方ID"`
	Recipe        Recipe      `gorm:"foreignKey:RecipeID"`
	RawMaterialID uint32      `gorm:"not null;comment:关联的原料ID"`
	RawMaterial   RawMaterial `gorm:"foreignKey:RawMaterialID"`
	// 重量百分比
	Percentage float32 `gorm:"not null;comment:原料在配方中的百分比 (0-1之间的小数, 例如0.15代表15%)"`
}

func (RecipeIngredient) TableName() string {
	return "recipe_ingredients"
}