ListMedicationLogs

internal/infra/repository/medication_repository.go

@@ -0,0 +1,80 @@
+package repository
+
+import (
+	"time"
+
+	"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
+	"gorm.io/gorm"
+)
+
+// MedicationLogListOptions 定义了查询用药记录时的可选参数
+type MedicationLogListOptions struct {
+	PigBatchID   *uint
+	MedicationID *uint
+	Reason       *models.MedicationReasonType
+	OperatorID   *uint
+	StartTime    *time.Time // 基于 happened_at 字段
+	EndTime      *time.Time // 基于 happened_at 字段
+	OrderBy      string     // 例如 "happened_at asc"
+}
+
+// MedicationRepository 定义了与药品相关的数据库操作接口
+type MedicationRepository interface {
+	ListMedicationLogs(opts MedicationLogListOptions, page, pageSize int) ([]models.MedicationLog, int64, error)
+}
+
+// gormMedicationRepository 是 MedicationRepository 的 GORM 实现
+type gormMedicationRepository struct {
+	db *gorm.DB
+}
+
+// NewGormMedicationRepository 创建一个新的 MedicationRepository GORM 实现
+func NewGormMedicationRepository(db *gorm.DB) MedicationRepository {
+	return &gormMedicationRepository{db: db}
+}
+
+// ListMedicationLogs 实现了分页和过滤查询用药记录的功能
+func (r *gormMedicationRepository) ListMedicationLogs(opts MedicationLogListOptions, page, pageSize int) ([]models.MedicationLog, int64, error) {
+	if page <= 0 || pageSize <= 0 {
+		return nil, 0, ErrInvalidPagination
+	}
+
+	var results []models.MedicationLog
+	var total int64
+
+	query := r.db.Model(&models.MedicationLog{})
+
+	if opts.PigBatchID != nil {
+		query = query.Where("pig_batch_id = ?", *opts.PigBatchID)
+	}
+	if opts.MedicationID != nil {
+		query = query.Where("medication_id = ?", *opts.MedicationID)
+	}
+	if opts.Reason != nil {
+		query = query.Where("reason = ?", *opts.Reason)
+	}
+	if opts.OperatorID != nil {
+		query = query.Where("operator_id = ?", *opts.OperatorID)
+	}
+	if opts.StartTime != nil {
+		query = query.Where("happened_at >= ?", *opts.StartTime)
+	}
+	if opts.EndTime != nil {
+		query = query.Where("happened_at <= ?", *opts.EndTime)
+	}
+
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	orderBy := "happened_at DESC"
+	if opts.OrderBy != "" {
+		orderBy = opts.OrderBy
+	}
+	query = query.Order(orderBy).Preload("Medication")
+
+	offset := (page - 1) * pageSize
+	err := query.Limit(pageSize).Offset(offset).Find(&results).Error
+
+	return results, total, err
+}