114 lines
4.4 KiB
Go
114 lines
4.4 KiB
Go
package models
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import (
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"time"
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"gorm.io/gorm"
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)
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/*
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饲料和饲喂相关的模型
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*/
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// RawMaterial 代表饲料的原料。
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// 建议：所有重量单位统一存储 (例如, 全部使用 'g')，便于计算和避免转换错误。
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type RawMaterial struct {
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gorm.Model
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Name string `gorm:"size:100;unique;not null;comment:原料名称"`
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Description string `gorm:"size:255;comment:描述"`
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Quantity float64 `gorm:"not null;comment:库存总量, 单位: g"`
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}
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func (RawMaterial) TableName() string {
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return "raw_materials"
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}
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// RawMaterialPurchase 记录了原料的每一次采购。
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type RawMaterialPurchase struct {
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gorm.Model
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RawMaterialID uint `gorm:"not null;index;comment:关联的原料ID"`
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RawMaterial RawMaterial `gorm:"foreignKey:RawMaterialID"`
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Supplier string `gorm:"size:100;comment:供应商"`
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Amount float64 `gorm:"not null;comment:采购数量, 单位: g"`
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UnitPrice float64 `gorm:"comment:单价"`
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TotalPrice float64 `gorm:"comment:总价"`
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PurchaseDate time.Time `gorm:"primaryKey;comment:采购日期"`
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CreatedAt time.Time
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}
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func (RawMaterialPurchase) TableName() string {
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return "raw_material_purchases"
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}
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// StockLogSourceType 定义了库存日志来源的类型
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type StockLogSourceType string
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const (
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StockLogSourcePurchase StockLogSourceType = "采购入库"
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StockLogSourceFeeding StockLogSourceType = "饲喂出库"
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StockLogSourceDeteriorate StockLogSourceType = "变质出库"
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StockLogSourceSale StockLogSourceType = "售卖出库"
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StockLogSourceMiscellaneous StockLogSourceType = "杂用领取"
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StockLogSourceManual StockLogSourceType = "手动盘点"
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)
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// RawMaterialStockLog 记录了原料库存的所有变动，提供了完整的追溯链。
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type RawMaterialStockLog struct {
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gorm.Model
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RawMaterialID uint `gorm:"not null;index;comment:关联的原料ID"`
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ChangeAmount float64 `gorm:"not null;comment:变动数量, 正数为入库, 负数为出库"`
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SourceType StockLogSourceType `gorm:"size:50;not null;index;comment:库存变动来源类型"`
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SourceID uint `gorm:"not null;index;comment:来源记录的ID (如 RawMaterialPurchase.ID 或 FeedUsageRecord.ID)"`
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HappenedAt time.Time `gorm:"primaryKey;comment:业务发生时间"`
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Remarks string `gorm:"comment:备注, 如主动领取的理由等"`
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}
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func (RawMaterialStockLog) TableName() string {
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return "raw_material_stock_logs"
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}
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// FeedFormula 代表饲料配方。
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// 对于没有配方的外购饲料，可以将其视为一种特殊的 RawMaterial, 并为其创建一个仅包含它自己的 FeedFormula。
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type FeedFormula struct {
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gorm.Model
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Name string `gorm:"size:100;unique;not null;comment:配方名称"`
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Description string `gorm:"size:255;comment:描述"`
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Components []FeedFormulaComponent `gorm:"foreignKey:FeedFormulaID"`
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}
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func (FeedFormula) TableName() string {
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return "feed_formulas"
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}
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// FeedFormulaComponent 代表配方中的一种原料及其占比。
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type FeedFormulaComponent struct {
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gorm.Model
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FeedFormulaID uint `gorm:"not null;index;comment:外键到 FeedFormula"`
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RawMaterialID uint `gorm:"not null;index;comment:外键到 RawMaterial"`
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RawMaterial RawMaterial `gorm:"foreignKey:RawMaterialID"`
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Percentage float64 `gorm:"not null;comment:该原料在配方中的百分比 (0-1.0)"`
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}
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func (FeedFormulaComponent) TableName() string {
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return "feed_formula_components"
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}
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// FeedUsageRecord 代表饲料使用记录。
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// 应用层逻辑：当一条使用记录被创建时，应根据其使用的 FeedFormula,
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// 计算出每种 RawMaterial 的消耗量，并在 RawMaterialStockLog 中创建对应的出库记录。
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type FeedUsageRecord struct {
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gorm.Model
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PenID uint `gorm:"not null;index;comment:关联的猪栏ID"`
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Pen Pen `gorm:"foreignKey:PenID"`
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FeedFormulaID uint `gorm:"not null;index;comment:使用的饲料配方ID"`
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FeedFormula FeedFormula `gorm:"foreignKey:FeedFormulaID"`
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Amount float64 `gorm:"not null;comment:使用数量, 单位: g"`
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RecordedAt time.Time `gorm:"primaryKey;comment:记录时间"`
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OperatorID uint `gorm:"not null;comment:操作员"`
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Remarks string `gorm:"comment:备注, 如 '例行喂料, 弱猪补料' 等"`
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}
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func (FeedUsageRecord) TableName() string {
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return "feed_usage_records"
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}
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