public static bool IsValid <T>(this IGridifyOrdering ordering, IGridifyMapper <T>?mapper = null)
{
if (string.IsNullOrWhiteSpace(ordering.OrderBy))
{
return(true);
}
try
{
var orders = ParseOrderings(ordering.OrderBy !).ToList();
mapper ??= new GridifyMapper <T>(true);
if (orders.Any(order => !mapper.HasMap(order.MemberName)))
{
return(false);
}
}
catch (Exception)
{
return(false);
}
return(true);
}
public static IEnumerable <Expression <Func <T, object> > > GetOrderingExpressions <T>(this IGridifyOrdering gridifyOrdering,
IGridifyMapper <T>?mapper = null)
{
if (string.IsNullOrWhiteSpace(gridifyOrdering.OrderBy))
{
throw new GridifyQueryException("OrderBy is not defined or not Found");
}
var members = ParseOrderings(gridifyOrdering.OrderBy !).Select(q => q.MemberName).ToList();
if (mapper is null)
{
foreach (var member in members)
{
Expression <Func <T, object> >?exp = null;
try
{
exp = GridifyMapper <T> .CreateExpression(member);
}
catch (Exception)
{
// skip if there is no mappings available
}
if (exp != null)
{
yield return(exp);
}
}
}
else
{
foreach (var member in members.Where(mapper.HasMap))
{
yield return(mapper.GetExpression(member) !);
}
}
}
