🐛 Fix flush reading anchor

pkg/internal/services/reading_anchor.go

@@ -4,7 +4,6 @@ import (
 	"git.solsynth.dev/hypernet/messaging/pkg/internal/database"
 	"git.solsynth.dev/hypernet/messaging/pkg/internal/models"
 	"github.com/rs/zerolog/log"
-	"github.com/samber/lo"
 	"gorm.io/gorm"
 )
 
@@ -22,19 +21,15 @@ func FlushReadingAnchor() {
 	if len(readingAnchorQueue) == 0 {
 		return
 	}
-	idSet := lo.Uniq(lo.Map(lo.Keys(readingAnchorQueue), func(item uint, _ int) uint {
-		return item
-	}))
-	var pairs []map[string]any
 	for k, v := range readingAnchorQueue {
-		pairs = append(pairs, map[string]any{
-			"id":             k,
-			"reading_anchor": gorm.Expr("GREATEST(reading_anchor, ?)", v),
-		})
-	}
-	if err := database.C.Model(&models.ChannelMember{}).
-		Where("id IN ?", idSet).
-		Updates(pairs).Error; err != nil {
-		log.Error().Err(err).Msg("An error occurred when flushing reading anchor...")
+		if err := database.C.Model(&models.ChannelMember{}).
+			Where("id = ?", k).
+			Updates(map[string]any{
+				"reading_anchor": gorm.Expr("GREATEST(reading_anchor, ?)", v),
+			}).Error; err != nil {
+			log.Error().Err(err).Msg("An error occurred when flushing reading anchor...")
+			return
+		}
 	}
+	clear(readingAnchorQueue)
 }