optimize get index trends info logic

internal/dao/jinzhu/metrics.go

@@ -5,6 +5,8 @@
 package jinzhu
 
 import (
+	"time"
+
 	"github.com/rocboss/paopao-ce/internal/core"
 	"github.com/rocboss/paopao-ce/internal/core/cs"
 	"github.com/rocboss/paopao-ce/internal/dao/jinzhu/dbr"
@@ -71,6 +73,7 @@ func (s *userMetricSrvA) UpdateUserMetric(userId int64, action uint8) (err error
 			UserId: userId,
 		}
 	}
+	metric.LatestTrendsOn = time.Now().Unix()
 	switch action {
 	case cs.MetricActionCreateTweet:
 		metric.TweetsCount++

internal/dao/jinzhu/trends.go

@@ -27,7 +27,7 @@ func (s *trendsSrvA) GetIndexTrends(userId int64, limit int, offset int) (res []
 	if offset >= 0 && limit > 0 {
 		db = db.Limit(limit).Offset(offset)
 	}
-	if err = db.Order("r.style ASC").Select("username", "nickname", "avatar").Find(&res).Error; err == nil {
+	if err = db.Order("r.style ASC, m.latest_trends_on DESC").Select("username", "nickname", "avatar").Find(&res).Error; err == nil {
 		res = cs.DistinctTrends(res)
 	}
 	return