public async Task <IDictionary <Guid, Customer> > ByOrders(string orderIds)
{
var manyToManyRepo = new CustomerOrderRepository();
var _orderIds = orderIds.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries)
.Select(id => Guid.Parse(id))
.ToList();
var allCustomers = await _repository.Customers();
var allManyToMany = await manyToManyRepo.CustomerOrderRelationships();
var data = allManyToMany
.Where(r => _orderIds.Contains(r.OrderId))
.Join(allCustomers, r => r.CustomerId, c => c.Id, (r, c) =>
{
return(new
{
Customer = c,
OrderId = r.OrderId
});
})
.ToDictionary(a => a.OrderId, a => a.Customer);
return(data);
}