fix(agent-ratio): 에이전트 정산 비율 수정 충돌 처리를 안정화한다

src/main/kotlin/kr/co/vividnext/sodalive/admin/partner/agent/ratio/AdminAgentSettlementRatioService.kt

@@ -27,7 +27,7 @@ class AdminAgentSettlementRatioService(
 
         val ratio = request.toEntity()
         ratio.member = agent
-        saveRatioOrThrow(request, ratio)
+        saveRatioOrThrow(ratio)
     }
 
     @Transactional
@@ -39,11 +39,11 @@ class AdminAgentSettlementRatioService(
             ?: throw SodaException(messageKey = "partner.agent.ratio.not_found")
         validateNewEffectiveFrom(existing.effectiveFrom, request.effectiveFrom)
         existing.close(request.effectiveFrom)
-        repository.save(existing)
+        repository.saveAndFlush(existing)
 
         val ratio = request.toEntity()
         ratio.member = agent
-        saveRatioOrThrow(request, ratio)
+        saveRatioOrThrow(ratio)
     }
 
     @Transactional(readOnly = true)
@@ -95,16 +95,20 @@ class AdminAgentSettlementRatioService(
         }
     }
 
-    private fun saveRatioOrThrow(
-        request: CreateAgentSettlementRatioRequest,
-        ratio: AgentSettlementRatio
-    ) {
+    private fun saveRatioOrThrow(ratio: AgentSettlementRatio) {
         try {
             repository.saveAndFlush(ratio)
         } catch (e: DataIntegrityViolationException) {
-            repository.findFirstByMemberIdAndEffectiveToIsNull(request.memberId)
-                ?: throw e
-            throw SodaException(messageKey = "partner.agent.ratio.invalid_effective_from")
+            if (isActiveRatioConflict(e)) {
+                throw SodaException(messageKey = "partner.agent.ratio.invalid_effective_from")
+            }
+            throw e
         }
     }
+
+    private fun isActiveRatioConflict(exception: Throwable): Boolean {
+        return generateSequence(exception) { it.cause }
+            .mapNotNull { it.message }
+            .any { it.contains("uk_agent_settlement_ratio_member_active") }
+    }
 }