Sorting issue in Episerver Find 13.0.1

We have known an issue about sorting in Find 13.0.1 that we can reproduce

• Create a developer index in find.episerver.com.
• Create some properties for string, DateTime, int type for a page type
• Create some page using those page types.
• Run the site and index the content.
• In the test page, create query and sort by Date or SortNumber.

var query = _searchClient.Search<BasePage>()
    .FilterForVisitor()
    .OrderBy(x => x.MyOwnDate)
    .Select(x => new SearchItem
    {
        PageTitle = x.Name,
        MyOwnDate = x.MyOwnDate,
        SortNumber = x.SortNumber,
        TeaserText = x.TeaserText,
        ID = x.ContentLink.ID
    })
    .Take(100);

model.SearchResults = query.GetResult().Hits.Select(x => x.Document).ToList();

And the bug is published https://world.episerver.com/support/Bug-list/bug/FIND-3596 and will be fixed in next version.

While waiting for upgrading to the next version, we can have a way of working around:

.OrderBy(x => x.MyOwnDate, null, null, false);
// Or
.OrderBy(x => x.MyOwnDate, null, SortOrder.Ascending, false);
// For order descending, we had:
.OrderBy(x => x.MyOwnDate, null, SortOrder.Descending, false);

We need to change OrderBy clause and make sure that the ignoreUnmapped parameter is false.

We can apply the same working around for other types: date, int, ...

Hope this helps your work.

/Son Do