public async Task <T> FirstOrDefaultAsync()
{
var context = GetContext();
var result = await GenericInMemoryMergeEngine <T> .Create(context).ExecuteAsync(async queryable => await EntityFrameworkQueryableExtensions.FirstOrDefaultAsync((IQueryable <T>)queryable));
var q = result.Where(o => o != null).AsQueryable();
if (context.Orders.Any())
{
return(q.OrderWithExpression(context.Orders).FirstOrDefault());
}
return(q.FirstOrDefault());
}
private async Task <List <TResult> > GetGenericMergeEngine <TResult>(Func <IQueryable, Task <TResult> > efQuery)
{
return(await GenericInMemoryMergeEngine <T> .Create(GetContext()).ExecuteAsync(efQuery));
}