public IQueryable <TResource> Apply(ModelProvider provider, IQueryable <TResource> query)
{
for (var i = 0; i < _sorts.Length; i++)
{
var sort = _sorts[i];
if (provider.TrySort(sort.Property, out var property))
{
var lambda = sort.Apply(provider.Target, _ => null);
string method;
if (i == 0)
{
method = sort.Direction == SortDirection.Ascending
? nameof(Queryable.OrderBy)
: nameof(Queryable.OrderByDescending);
}
else
{
method = sort.Direction == SortDirection.Ascending
? nameof(Queryable.ThenBy)
: nameof(Queryable.ThenByDescending);
}
var exp = Expression.Call(typeof(Queryable), method,
new[] { provider.Target.Type, property.PropertyType },
query.Expression, lambda);
query = query.Provider.CreateQuery <TResource>(exp);
}
else
{
throw new ArgumentException("Cannot sort selected property");
}
}
return(query);
}
