public async Task <PagedResultDto <AuthorDto> > GetListAsync(GetAuthorListDto input)
        {
            return(await _cacheService.GetListAsync(AuthorCacheConsts.CacheKey.Key_GetList.FormatWith(input.SkipCount, input.MaxResultCount), async() =>
            {
                if (string.IsNullOrWhiteSpace(input.Sorting))
                {
                    input.Sorting = nameof(Author.Name);
                }

                var authors = await _authorRepository.GetListAsync(
                    input.SkipCount,
                    input.MaxResultCount,
                    input.Sorting,
                    input.Filter
                    );

                var totalCount = await AsyncExecuter.CountAsync(
                    _authorRepository.WhereIf(
                        !string.IsNullOrWhiteSpace(input.Filter),
                        author => author.Name.Contains(input.Filter)
                        )
                    );

                return new PagedResultDto <AuthorDto>(
                    totalCount,
                    ObjectMapper.Map <List <Author>, List <AuthorDto> >(authors)
                    );
            }));
        }
        public async Task <PagedResultDto <AuthorDto> > GetListAsync(GetAuthorListDto input)
        {
            if (input.Sorting.IsNullOrWhiteSpace())
            {
                input.Sorting = nameof(Author.Name);
            }

            var authors = await _authorRepository.GetListAsync(
                input.SkipCount,
                input.MaxResultCount,
                input.Sorting,
                input.Filter
                );

            var totalCount = await AsyncExecuter.CountAsync(
                _authorRepository.WhereIf(
                    !input.Filter.IsNullOrWhiteSpace(),
                    author => author.Name.Contains(input.Filter)
                    )
                );

            return(new PagedResultDto <AuthorDto>(
                       totalCount,
                       ObjectMapper.Map <List <Author>, List <AuthorDto> >(authors)
                       ));
        }