public static string CanOrder(QueryToken token)
{
if (token == null)
{
return("No column selected");
}
if (token.Type.IsEmbeddedEntity() && !OrderAdapters.ContainsKey(token.Type))
{
return("{0} can not be ordered".FormatWith(token.Type.NicePluralName()));
}
if (QueryToken.IsCollection(token.Type))
{
return("Collections can not be ordered");
}
if (token.HasAllOrAny())
{
return("'{0}', '{1}', '{2}' or '{3}' can not be ordered".FormatWith(
CollectionAnyAllType.All.NiceToString(),
CollectionAnyAllType.Any.NiceToString(),
CollectionAnyAllType.NoOne.NiceToString(),
CollectionAnyAllType.AnyNo.NiceToString()));
}
return(null);
}