Sort on 'mediafile_duration' gives strange result

[Michiel.Schok]

When performing a search query on assets and sorting by 'mediafile_duration', we observe strange results. Some of the assets appear twice in the result list.

Compare the following two results:

[GET] asset?limit=50&hide_empty_assets=true&cql=((owner_id==SURFNET.michiel))+sortby+mediafile_duration

...
<item_count_total>32</item_count_total>
...

and

[GET] asset?limit=50&hide_empty_assets=true&cql=((owner_id==SURFNET.michiel))+sortby+title

...
<item_count_total>29</item_count_total>
...

It seems as if the 'external assets' with an empty 'mediafile_duration' appear as well at the top of the list, as on the bottom of the list.

[forgacs]

Robert: I can confirm this behaviour. If an asset has is_external = TRUE and mediafile_duration is empty, then it appears in the list two times.

[robert]

Fixed. Problem was caused by empty mediafile_duration values and the new way we sort in 2.x.

[Michiel.Schok]

Both rest-calls now result in '50 items'.