『博客开发日记-后台』之删除字典接口的实现

删除字典接口的实现

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删除字典接口的需求

检查是否有选择到要删除的字典

获取字典id列表

检查选择的字典是否存在

如果有不存在的字典，就找出对应的字典id

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代码实现

DictController

@DeleteMapping("/{ids}")
@PreAuthorize("@ps.hasPermission('blog:dict:delete')")
@SystemLog(businessName = "删除字典(逻辑删除)")
@ApiOperation(value = "删除字典接口（批量逻辑删除）", notes = "删除字典，支持批量删除", response = String.class)
@ApiImplicitParam(name = "ids", value = "字典id", dataType = "Long", paramType = "path", required = true)
public ResponseResult deleteDict(@PathVariable Long[] ids)
{
    return sysDictService.deleteDict(ids);
}

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在 SysDictServiceImpl 中实现功能

 //删除字典
@Override
public ResponseResult deleteDict(Long[] ids)
{
    //检查是否有选择到要删除的字典
    if (ids == null || ids.length == 0) {
        return ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR, "请选择要删除的字典");
    }

    //获取字典id列表
    List<Long> idList = List.of(ids);

    //检查选择的字典是否存在
    List<SysDict> dictsToDelete = sysDictService.listByIds(idList);
    if (dictsToDelete.size() != ids.length){
        //如果有不存在的字典，就找出对应的字典id
        Set<Long> existIds = dictsToDelete.stream()
                .map(SysDict::getId)
                .collect(Collectors.toSet());

        List<Long> notExistIds = idList.stream()
                .filter(id -> !existIds.contains(id))
                .toList();

        return ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR, "删除失败！！原因：以下字典 id 不存在：" + notExistIds);
    }

    //根据部门id列表删除字典
    sysDictService.removeByIds(idList);

    return ResponseResult.okResult();
}

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PS:该系列只做为作者学习开发项目做的笔记用

不一定符合读者来学习，仅供参考

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预告

后续会记录博客的开发过程

每次学习会做一份笔记来进行发表

“一花一世界，一叶一菩提”

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