排错

AttrServiceImpl.java下加入这个代码后 规格参数页面又不显示了

 @Override
     public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
 ​
 ​
         QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<>();
         if(catelogId!=0){
             queryWrapper.eq("catelog_id",catelogId);
         }
         String key = (String) params.get("key");
         if (!StringUtils.isEmpty(key)){
             queryWrapper.and((wrapper)->{
                 wrapper.eq("attr_id",key).or().like("attr_name",key);
             });
         }
         IPage<AttrEntity> page = this.page(
                 new Query<AttrEntity>().getPage(params),
                 queryWrapper
         );
         PageUtils pageUtils = new PageUtils(page);
         List<AttrEntity> records = page.getRecords();
         List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
             AttrRespVo attrRespVo = new AttrRespVo();
             BeanUtils.copyProperties(attrEntity, attrRespVo);//把attrEntity里面的属性拷贝到attrRespVo里面
             //1.设置分类和分组的名字
             //分组
             AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
 ​
             if (attrId != null) {
                 AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                 attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
             }
             //分类
             CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
             if (categoryEntity != null) {
                 attrRespVo.setCatelogName(categoryEntity.getName());
             }
 ​
 ​
             return attrRespVo;
         }).collect(Collectors.toList());
         pageUtils.setList(respVos);
 ​
         return pageUtils;

报错内容

 org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
     at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:96)
     at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441)
     at com.sun.proxy.$Proxy97.selectOne(Unknown Source)
     at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160)
     at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:89)
     at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148)
     at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89)
     at com.sun.proxy.$Proxy98.selectOne(Unknown Source)
     at com.doudou.gulimall.product.service.impl.AttrServiceImpl.lambda$queryBaseAttrPage$1(AttrServiceImpl.java:109)
     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
     at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
     at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
     at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
     at com.doudou.gulimall.product.service.impl.AttrServiceImpl.queryBaseAttrPage(AttrServiceImpl.java:123)

规格参数页面一直出错

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