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fix(service): 修正推荐主题查询逻辑避免重复数据

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优化 getRecommendedThemes 方法，使用 limit(8) 替代 SQL 的 LIMIT 8，防止分页插件干扰，确保只返回 8 条未购买的热门主题。
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ziin
2025-12-11 16:43:19 +08:00
parent fb94c2069d
commit 5121bf3455
1 changed files with 16 additions and 7 deletions
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23
src/main/java/com/yolo/keyborad/service/impl/KeyboardThemesServiceImpl.java
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@@ -1,6 +1,7 @@
package com.yolo.keyborad.service.impl; package com.yolo.keyborad.service.impl;
import cn.hutool.core.bean.BeanUtil; import cn.hutool.core.bean.BeanUtil;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.yolo.keyborad.model.entity.KeyboardThemePurchase; import com.yolo.keyborad.model.entity.KeyboardThemePurchase;
import com.yolo.keyborad.service.KeyboardThemePurchaseService; import com.yolo.keyborad.service.KeyboardThemePurchaseService;
import jakarta.annotation.Resource; import jakarta.annotation.Resource;
@@ -132,15 +133,23 @@ public class KeyboardThemesServiceImpl extends ServiceImpl<KeyboardThemesMapper,
.map(KeyboardThemePurchase::getThemeId) .map(KeyboardThemePurchase::getThemeId)
.collect(Collectors.toSet()); .collect(Collectors.toSet());
// 查询推荐主题列表：未删除、已启用、未购买、按真实下载量降序、限制8条 // 构建查询器
return this.lambdaQuery() LambdaQueryChainWrapper<KeyboardThemes> queryWrapper = this.lambdaQuery()
.eq(KeyboardThemes::getDeleted, false) .eq(KeyboardThemes::getDeleted, false)
.eq(KeyboardThemes::getThemeStatus, true) .eq(KeyboardThemes::getThemeStatus, true)
.notIn(!purchasedThemeIds.isEmpty(), KeyboardThemes::getId, purchasedThemeIds) .orderByDesc(KeyboardThemes::getRealDownloadCount);
.orderByDesc(KeyboardThemes::getRealDownloadCount)
.last("LIMIT 8") // 如果有已购买的主题，排除它们
.list() if (!purchasedThemeIds.isEmpty()) {
.stream() queryWrapper.notIn(KeyboardThemes::getId, purchasedThemeIds);
}
// 查询推荐主题列表，限制8条
List<KeyboardThemes> themesList = queryWrapper.list();
// 只取前8条数据
return themesList.stream()
.limit(8)
.map(theme -> { .map(theme -> {
KeyboardThemesRespVO vo = BeanUtil.copyProperties(theme, KeyboardThemesRespVO.class); KeyboardThemesRespVO vo = BeanUtil.copyProperties(theme, KeyboardThemesRespVO.class);
// 推荐列表中的主题均为未购买状态 // 推荐列表中的主题均为未购买状态