public async Task <IQueryable <DiscountStatisticsDto> > GetStatisticsAsync(
ODataQueryOptions <DiscountStatisticsDto> options,
string searchText, DateTime startDate, DateTime endDate)
{
var discounts = await _searchService.SearchAsync(searchText);
var discountsDto = _mapper.Map <IEnumerable <DiscountStatisticsDto> >(discounts);
var discountViewsAmounts = await _statisticsRepository.GetInWhereAsync(
s => s.DiscountId, discounts.Select(d => d.Id), startDate, endDate);
var discountsQueryable = discountsDto.GroupJoin(
discountViewsAmounts,
d => d.Id,
s => s.DiscountId,
(d, statistics) =>
{
d.ViewsAmount = statistics.Sum(s => s.ViewsAmount);
return(d);
}).AsQueryable();
if (options.Filter != null)
{
return(options.ApplyTo(discountsQueryable) as IQueryable <DiscountStatisticsDto>);
}
return(discountsQueryable);
}