ListPigPurchases

internal/infra/repository/pig_trade_repository.go

@@ -1,10 +1,22 @@
 package repository
 
 import (
+	"time"
+
 	"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
 	"gorm.io/gorm"
 )
 
+// PigPurchaseListOptions 定义了查询猪只采购记录时的可选参数
+type PigPurchaseListOptions struct {
+	PigBatchID *uint
+	Supplier   *string
+	OperatorID *uint
+	StartTime  *time.Time // 基于 purchase_date 字段
+	EndTime    *time.Time // 基于 purchase_date 字段
+	OrderBy    string     // 例如 "purchase_date desc"
+}
+
 // PigTradeRepository 定义了猪只交易数据持久化的接口。
 // 领域服务通过此接口与数据层交互，实现解耦。
 type PigTradeRepository interface {
@@ -13,6 +25,9 @@ type PigTradeRepository interface {
 
 	// CreatePigPurchaseTx 在数据库中创建一条猪只采购记录。
 	CreatePigPurchaseTx(tx *gorm.DB, purchase *models.PigPurchase) error
+
+	// ListPigPurchases 支持分页和过滤的猪只采购记录列表查询
+	ListPigPurchases(opts PigPurchaseListOptions, page, pageSize int) ([]models.PigPurchase, int64, error)
 }
 
 // gormPigTradeRepository 是 PigTradeRepository 接口的 GORM 实现。
@@ -34,3 +49,46 @@ func (r *gormPigTradeRepository) CreatePigSaleTx(tx *gorm.DB, sale *models.PigSa
 func (r *gormPigTradeRepository) CreatePigPurchaseTx(tx *gorm.DB, purchase *models.PigPurchase) error {
 	return tx.Create(purchase).Error
 }
+
+// ListPigPurchases 实现了分页和过滤查询猪只采购记录的功能
+func (r *gormPigTradeRepository) ListPigPurchases(opts PigPurchaseListOptions, page, pageSize int) ([]models.PigPurchase, int64, error) {
+	if page <= 0 || pageSize <= 0 {
+		return nil, 0, ErrInvalidPagination
+	}
+
+	var results []models.PigPurchase
+	var total int64
+
+	query := r.db.Model(&models.PigPurchase{})
+
+	if opts.PigBatchID != nil {
+		query = query.Where("pig_batch_id = ?", *opts.PigBatchID)
+	}
+	if opts.Supplier != nil {
+		query = query.Where("supplier LIKE ?", "%"+*opts.Supplier+"%")
+	}
+	if opts.OperatorID != nil {
+		query = query.Where("operator_id = ?", *opts.OperatorID)
+	}
+	if opts.StartTime != nil {
+		query = query.Where("purchase_date >= ?", *opts.StartTime)
+	}
+	if opts.EndTime != nil {
+		query = query.Where("purchase_date <= ?", *opts.EndTime)
+	}
+
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	orderBy := "purchase_date DESC"
+	if opts.OrderBy != "" {
+		orderBy = opts.OrderBy
+	}
+	query = query.Order(orderBy)
+
+	offset := (page - 1) * pageSize
+	err := query.Limit(pageSize).Offset(offset).Find(&results).Error
+
+	return results, total, err
+}