微服务实战——平台属性

平台属性

中间表复杂业务

/*** 获取分类规格参数（模糊查询）** @param params* @param catelogId* @param type type="base"时查询基础属性，type="sale"时查询销售属性* @return*/
@Override
public PageUtils listByCatelogId(Map<String, Object> params, Long catelogId, String type) {String key = (String) params.get("key");QueryWrapper<AttrEntity> wrapper = new QueryWrapper<>();// 1.判断参数中是否存在检索关键字keyif(!StringUtils.isEmpty(key)){wrapper.and((obj) -> {obj.eq("attr_id", key).or().like("attr_name", key).or().like("value_select", key);});}// 2.判断参数中是否存在catelogId// 2.1.查询全部if(catelogId != 0){wrapper.eq("catelog_id", catelogId);}IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params),wrapper.eq("attr_type", "base".equalsIgnoreCase(type) ? 1 : 0));PageUtils pageUtils = new PageUtils(page);// 3.封装成AttrRespVOList<AttrRespVo> respVos = page.getRecords().stream().map((attrEntity) -> {AttrRespVo attrRespVo = new AttrRespVo();BeanUtils.copyProperties(attrEntity, attrRespVo);// 3.1.得到所属分类名CategoryEntity categoryEntity = categoryService.getById(attrEntity.getCatelogId());if(categoryEntity != null){attrRespVo.setCatelogName(categoryEntity.getName());}// 3.2.得到所属分组名if (ATTR_TYPE_BASE.getMsg().equalsIgnoreCase(type)) {AttrAttrgroupRelationEntity relationEntity = relationService.query().eq("attr_id", attrEntity.getAttrId()).one();if(relationEntity != null){AttrGroupEntity attrGroupEntity = attrGroupService.getById(relationEntity.getAttrGroupId());attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());}}return attrRespVo;}).collect(Collectors.toList());pageUtils.setList(respVos);return pageUtils;
}

批量删除

/*** 删除属性与分组的关联关系 * DELETE FROM pms_attr_attrgroup_relation * WHERE (( attr_id = 1 and attr_group_id = 1) OR ( attr_id = 2 and attr_group_id = 3))*/
@Override
public void deleteRelation(List<AttrGroupRelationVo> voList) {// 1.获取List<AttrAttrgroupRelationEntity> relationEntities = voList.stream().map(attrGroupRelationVo -> {AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();relationEntity.setAttrId(attrGroupRelationVo.getAttrId());relationEntity.setAttrGroupId(attrGroupRelationVo.getAttrGroupId());return relationEntity;}).collect(Collectors.toList());// 2.批量删除relationDao.deleteBatchRelation(relationEntities);
}

<!--    DELETE FROM pms_attr_attrgroup_relation
WHERE (( attr_id = 1 and attr_group_id = 1) OR ( attr_id = 2 and attr_group_id = 3))-->
<delete id="deleteBatchRelation">DELETE FROM `pms_attr_attrgroup_relation` WHERE<foreach collection="relationEntities" item="item" separator=" OR ">( attr_id = #{item.attrId} AND attr_group_id = #{item.attrGroupId})</foreach>
</delete>

中间表复杂业务

/*** 获取属性分组没有关联的其他属性*/
@Override
public PageUtils listNoRelationAttr(Map<String, Object> params, Long attrgroupId) {// 1.获取分类idLong catelogId = this.query().eq("attr_group_id", attrgroupId).one().getCatelogId();// 2.获取当前分类下的其他分组id集合List<Long> groupIds = this.list(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId)).stream().map(AttrGroupEntity::getAttrGroupId).collect(Collectors.toList());;// 3.获取其他分组关联的属性id集合List<Long> attrIds = relationService.list(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", groupIds)).stream().map(AttrAttrgroupRelationEntity::getAttrId).collect(Collectors.toList());// 4.剔除其他分组关联的属性QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).ne("value_type", ATTR_TYPE_BASE.getCode());if(attrIds != null && attrIds.size() > 0){wrapper.notIn("attr_id", attrIds);}// 5.判断keyString key = (String) params.get("key");if(!StringUtils.isEmpty(key)){wrapper.and((obj) -> {obj.eq("attr_id", key).or().like("attr_name", key).or().like("value_select", key);});}IPage<AttrEntity> page = attrService.page(new Query<AttrEntity>().getPage(params), wrapper);return new PageUtils(page);
}