定义对应model

internal/infra/models/farm_asset.go

@@ -0,0 +1,39 @@
+package models
+
+import (
+	"gorm.io/gorm"
+)
+
+/*
+	猪场固定资产相关模型
+*/
+
+// PigHouse 定义了猪舍，是猪栏的集合
+type PigHouse struct {
+	gorm.Model
+	Name        string `gorm:"size:100;not null;unique;comment:猪舍名称, 如 '育肥舍A栋'"`
+	Description string `gorm:"size:255;comment:描述信息"`
+	Pens        []Pen  `gorm:"foreignKey:HouseID"` // 一个猪舍包含多个猪栏
+}
+
+// PenStatus 定义了猪栏的当前状态
+type PenStatus string
+
+const (
+	PenStatusEmpty      PenStatus = "空闲"
+	PenStatusOccupied   PenStatus = "占用"
+	PenStatusSickPen    PenStatus = "病猪栏"
+	PenStatusRecovering PenStatus = "康复栏"
+	PenStatusCleaning   PenStatus = "清洗消毒"
+	PenStatusUnderMaint PenStatus = "维修中"
+)
+
+// Pen 是猪栏的物理实体模型, 是所有空间相关数据的“锚点”
+type Pen struct {
+	gorm.Model
+	PenNumber  string    `gorm:"not null;comment:猪栏的唯一编号, 如 A-01"`
+	HouseID    uint      `gorm:"index;comment:所属猪舍ID"`
+	PigBatchID uint      `gorm:"index;comment:关联的猪批次ID"`
+	Capacity   int       `gorm:"not null;comment:设计容量 (头)"`
+	Status     PenStatus `gorm:"not null;index;comment:猪栏当前状态"`
+}

internal/infra/models/medication.go

@@ -66,3 +66,26 @@ type Medication struct {
 	Manufacturer                  string             `gorm:"size:100;comment:生产厂家" json:"manufacturer"`
 	Instructions                  datatypes.JSON     `gorm:"type:jsonb;comment:使用说明" json:"instructions"`
 }
+
+// MedicationReasonType 定义了用药原因
+type MedicationReasonType string
+
+const (
+	ReasonTypePreventive MedicationReasonType = "预防"
+	ReasonTypeTreatment  MedicationReasonType = "治疗"
+	ReasonTypeHealthCare MedicationReasonType = "保健"
+)
+
+// GroupMedicationLog 记录了对整个猪批次的用药情况
+type GroupMedicationLog struct {
+	gorm.Model
+	PigBatchID   uint                 `gorm:"not null;index;comment:关联的猪批次ID"`
+	MedicationID uint                 `gorm:"not null;index;comment:关联的药品ID"`
+	Medication   Medication           `gorm:"foreignKey:MedicationID"` // 预加载药品信息
+	DosageUsed   float64              `gorm:"not null;comment:使用的总剂量 (单位由药品决定,如g或ml)"`
+	TargetCount  int                  `gorm:"not null;comment:用药对象数量"`
+	Reason       MedicationReasonType `gorm:"size:20;not null;comment:用药原因"`
+	Description  string               `gorm:"size:255;comment:具体描述,如'治疗呼吸道病'"`
+	Operator     string               `gorm:"size:50;comment:操作员"`
+	HappenedAt   time.Time            `gorm:"not null;default:CURRENT_TIMESTAMP;comment:用药时间"`
+}

internal/infra/models/pig.go

@@ -1,5 +1,74 @@
 package models
 
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
 /*
-	和猪只本身相关的模型
+	和猪只、猪群本身相关的模型
 */
+
+// PigBatchStatus 定义了猪批次所处的不同阶段或状态
+type PigBatchStatus string
+
+const (
+	BatchStatusWeaning   PigBatchStatus = "保育" // 从断奶到保育结束
+	BatchStatusGrowing   PigBatchStatus = "生长" // 生长育肥阶段
+	BatchStatusFinishing PigBatchStatus = "育肥" // 最后的育肥阶段
+	BatchStatusForSale   PigBatchStatus = "待售" // 达到出栏标准
+	BatchStatusSold      PigBatchStatus = "已出售"
+	BatchStatusArchived  PigBatchStatus = "已归档" // 批次结束（如全群淘汰等）
+)
+
+// PigBatchOriginType 定义了猪批次的来源
+type PigBatchOriginType string
+
+const (
+	OriginTypeSelfFarrowed PigBatchOriginType = "自繁"
+	OriginTypePurchased    PigBatchOriginType = "外购"
+)
+
+// PigBatch 是猪批次的核心模型，代表了一群被共同管理的猪
+type PigBatch struct {
+	gorm.Model
+	BatchNumber      string             `gorm:"size:50;not null;uniqueIndex;comment:批次编号,如 2024-W25-A01"`
+	OriginType       PigBatchOriginType `gorm:"size:20;not null;comment:批次来源 (自繁, 外购)"`
+	StartDate        time.Time          `gorm:"not null;comment:批次开始日期 (如转入日或购买日)"`
+	InitialCount     int                `gorm:"not null;comment:初始数量"`
+	CurrentCount     int                `gorm:"not null;comment:当前存栏数量"`
+	CurrentSickCount int                `gorm:"not null;default:0;comment:当前病猪数量"`
+	AverageWeight    float64            `gorm:"comment:平均体重 (kg)"`
+	Status           PigBatchStatus     `gorm:"size:20;not null;index;comment:批次状态"`
+	Pens             []Pen              `gorm:"foreignKey:PigBatchID;comment:所在圈舍ID"`
+}
+
+// LogChangeType 定义了猪批次数量变更的类型
+type LogChangeType string
+
+const (
+	ChangeTypeDeath       LogChangeType = "死亡"
+	ChangeTypeCull        LogChangeType = "淘汰"
+	ChangeTypeSale        LogChangeType = "销售"
+	ChangeTypeTransferIn  LogChangeType = "转入"
+	ChangeTypeTransferOut LogChangeType = "转出"
+	ChangeTypeTreatment   LogChangeType = "治疗" // 仅改变健康状态，不改变总数
+	ChangeTypeRecovering  LogChangeType = "康复" // 仅改变健康状态，不改变总数
+	ChangeTypeCorrection  LogChangeType = "盘点校正"
+)
+
+// PigBatchLog 记录了猪批次数量或状态的每一次变更
+type PigBatchLog struct {
+	gorm.Model
+	PigBatchID      uint          `gorm:"not null;index;comment:关联的猪批次ID"`
+	ChangeType      LogChangeType `gorm:"size:20;not null;comment:变更类型"`
+	ChangeCount     int           `gorm:"not null;comment:数量变化,负数表示减少"`
+	Reason          string        `gorm:"size:255;comment:变更原因描述"`
+	BeforeCount     int           `gorm:"not null;comment:变更前总数"`
+	AfterCount      int           `gorm:"not null;comment:变更后总数"`
+	BeforeSickCount int           `gorm:"not null;comment:变更前病猪数"`
+	AfterSickCount  int           `gorm:"not null;comment:变更后病猪数"`
+	Operator        string        `gorm:"size:50;comment:操作员"`
+	HappenedAt      time.Time     `gorm:"not null;default:CURRENT_TIMESTAMP;comment:事件发生时间"`
+}