100 lines
3.2 KiB
Go
100 lines
3.2 KiB
Go
package repository
|
||
|
||
import (
|
||
"errors"
|
||
"time"
|
||
|
||
"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
|
||
"gorm.io/gorm"
|
||
)
|
||
|
||
// ErrInvalidPagination 表示分页参数无效
|
||
var ErrInvalidPagination = errors.New("无效的分页参数：page和pageSize必须为大于0")
|
||
|
||
// SensorDataListOptions 定义了查询传感器数据列表时的可选参数
|
||
type SensorDataListOptions struct {
|
||
DeviceID *uint
|
||
SensorType *models.SensorType
|
||
StartTime *time.Time
|
||
EndTime *time.Time
|
||
OrderBy string // 例如 "time DESC"
|
||
}
|
||
|
||
// SensorDataRepository 定义了与传感器数据相关的数据库操作接口。
|
||
type SensorDataRepository interface {
|
||
Create(sensorData *models.SensorData) error
|
||
GetLatestSensorDataByDeviceIDAndSensorType(deviceID uint, sensorType models.SensorType) (*models.SensorData, error)
|
||
// List 支持分页和过滤的列表查询
|
||
List(opts SensorDataListOptions, page, pageSize int) ([]models.SensorData, int64, error)
|
||
}
|
||
|
||
// gormSensorDataRepository 是 SensorDataRepository 的 GORM 实现。
|
||
type gormSensorDataRepository struct {
|
||
db *gorm.DB
|
||
}
|
||
|
||
// NewGormSensorDataRepository 创建一个新的 SensorDataRepository GORM 实现实例。
|
||
func NewGormSensorDataRepository(db *gorm.DB) SensorDataRepository {
|
||
return &gormSensorDataRepository{db: db}
|
||
}
|
||
|
||
// Create 将一条新的传感器数据记录插入数据库。
|
||
func (r *gormSensorDataRepository) Create(sensorData *models.SensorData) error {
|
||
return r.db.Create(sensorData).Error
|
||
}
|
||
|
||
// GetLatestSensorDataByDeviceIDAndSensorType 根据设备ID和传感器类型查询最新的传感器数据。
|
||
func (r *gormSensorDataRepository) GetLatestSensorDataByDeviceIDAndSensorType(deviceID uint, sensorType models.SensorType) (*models.SensorData, error) {
|
||
var sensorData models.SensorData
|
||
// 增加一个时间范围来缩小查询范围, 从而加快查找速度, 当使用时序数据库时时间范围可以让数据库忽略时间靠前的分片
|
||
err := r.db.Where("device_id = ? AND sensor_type = ? AND time >=?", deviceID, sensorType, time.Now().Add(-24*time.Hour)).
|
||
Order("time DESC").
|
||
First(&sensorData).Error
|
||
return &sensorData, err
|
||
}
|
||
|
||
// List 实现了分页和过滤查询传感器数据的功能
|
||
func (r *gormSensorDataRepository) List(opts SensorDataListOptions, page, pageSize int) ([]models.SensorData, int64, error) {
|
||
// --- 校验分页参数 ---
|
||
if page <= 0 || pageSize <= 0 {
|
||
return nil, 0, ErrInvalidPagination
|
||
}
|
||
|
||
var results []models.SensorData
|
||
var total int64
|
||
|
||
query := r.db.Model(&models.SensorData{})
|
||
|
||
// --- 应用过滤条件 ---
|
||
if opts.DeviceID != nil {
|
||
query = query.Where("device_id = ?", *opts.DeviceID)
|
||
}
|
||
if opts.SensorType != nil {
|
||
query = query.Where("sensor_type = ?", *opts.SensorType)
|
||
}
|
||
if opts.StartTime != nil {
|
||
query = query.Where("time >= ?", *opts.StartTime)
|
||
}
|
||
if opts.EndTime != nil {
|
||
query = query.Where("time <= ?", *opts.EndTime)
|
||
}
|
||
|
||
// --- 计算总数 ---
|
||
if err := query.Count(&total).Error; err != nil {
|
||
return nil, 0, err
|
||
}
|
||
|
||
// --- 应用排序条件 ---
|
||
orderBy := "time DESC" // 默认排序
|
||
if opts.OrderBy != "" {
|
||
orderBy = opts.OrderBy
|
||
}
|
||
query = query.Order(orderBy)
|
||
|
||
// --- 分页 ---
|
||
offset := (page - 1) * pageSize
|
||
err := query.Limit(pageSize).Offset(offset).Find(&results).Error
|
||
|
||
return results, total, err
|
||
}
|