From 1335688dfa3dde7673f600e37bf5710f340aa86a Mon Sep 17 00:00:00 2001
From: ohhalim <ohhalim777@gmail.com>
Date: Wed, 1 Jul 2026 15:30:14 +0900
Subject: [PATCH] =?UTF-8?q?fix(ranking):=20=EA=B8=89=EC=83=81=EC=8A=B9/?=
 =?UTF-8?q?=EA=B8=89=ED=95=98=EB=9D=BD=200.0%=20=EB=B3=80=EB=8F=99?=
 =?UTF-8?q?=EB=A5=A0=20=ED=95=AD=EB=AA=A9=20=ED=95=84=ED=84=B0=EB=A7=81=20?=
 =?UTF-8?q?(#114)?=
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- GAIN: changeRate > 0 항목만 포함
- LOSS: changeRate < 0 항목만 포함
---
 .../com/membershipflow/course/service/CourseService.java  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/membershipflow/course/service/CourseService.java b/src/main/java/com/membershipflow/course/service/CourseService.java
index df7b272..1ee34c5 100644
--- a/src/main/java/com/membershipflow/course/service/CourseService.java
+++ b/src/main/java/com/membershipflow/course/service/CourseService.java
@@ -146,8 +146,14 @@ public RankingPageResponse getRanking(String period, String sort,
                     currentPrice, basePrice, changeRate, changeAmount));
         }
 
+        // 실제 변동이 있는 항목만 포함 (0.0% 제외)
+        boolean isLoss = "LOSS".equalsIgnoreCase(sort);
+        ranked = ranked.stream()
+                .filter(r -> isLoss ? r.changeRate() < 0 : r.changeRate() > 0)
+                .collect(Collectors.toCollection(ArrayList::new));
+
         // GAIN: 상승률 내림차순, LOSS: 하락률 오름차순
-        ranked.sort("LOSS".equalsIgnoreCase(sort)
+        ranked.sort(isLoss
                 ? (a, b) -> Double.compare(a.changeRate(), b.changeRate())
                 : (a, b) -> Double.compare(b.changeRate(), a.changeRate()));