[SIX-197] 현재 참여중인 채팅방을 조회하는 로직 구현 #110
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legowww
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Nov 24, 2023
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| for (Long chatRoomId : chatRoomIds) { | ||
| Query query = new Query(Criteria.where("chat_room_id").is(chatRoomId)); | ||
| query.with(Sort.by(Sort.Direction.DESC, "sent_message_time")); | ||
| query.limit(1); | ||
| ChatMessage latestMessage = mongoTemplate.findOne(query, ChatMessage.class); | ||
| if (latestMessage != null) { | ||
| latestMessages.add(latestMessage); | ||
| } | ||
| } |
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query.limit(1) 이 마지막 채팅 내용을 가져오는 쿼리인가요?
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MySQL의 limit와 같습니다~ query를 마지막으로 보내진 메시지 시간을 내림차순으로 정렬하고 그 쿼리에 대해 1개만 가지고 오면 결국 가장 최근에 보내진 메시지이기 때문입니다~
legowww
approved these changes
Nov 24, 2023
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Kudos, SonarCloud Quality Gate passed! |
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