issue-18初步实现

internal/infra/repository/device_repository.go

@@ -35,6 +35,9 @@ type DeviceRepository interface {
 
 	// FindByDevEui 根据 DevEui (存储在 properties JSONB 中的 lora_address) 查找设备 (新增)
 	FindByDevEui(devEui string) (*models.Device, error)
+
+	// FindByParentAndPhysicalAddress 根据父设备ID和物理地址(总线号、总线地址)查找设备
+	FindByParentAndPhysicalAddress(parentID uint, busNumber int32, busAddress int32) (*models.Device, error)
 }
 
 // gormDeviceRepository 是 DeviceRepository 的 GORM 实现
@@ -121,3 +124,18 @@ func (r *gormDeviceRepository) FindByDevEui(devEui string) (*models.Device, erro
 	}
 	return &device, nil
 }
+
+// FindByParentAndPhysicalAddress 根据父设备ID和物理地址(总线号、总线地址)查找设备
+func (r *gormDeviceRepository) FindByParentAndPhysicalAddress(parentID uint, busNumber int32, busAddress int32) (*models.Device, error) {
+	var device models.Device
+	// PostgreSQL 使用 ->> 操作符来查询 JSONB 字段的文本值
+	err := r.db.Where("parent_id = ?", parentID).
+		Where("properties->>'bus_number' = ?", strconv.Itoa(int(busNumber))).
+		Where("properties->>'bus_address' = ?", strconv.Itoa(int(busAddress))).
+		First(&device).Error
+
+	if err != nil {
+		return nil, fmt.Errorf("根据父设备ID %d 和物理地址 (总线号: %d, 总线地址: %d) 查找设备失败: %w", parentID, busNumber, busAddress, err)
+	}
+	return &device, nil
+}