You can use Solr fields to determine how your collections' objects are sorted.
- Make sure that your Collection Solution Pack is configured to use Solr for display generation (admin/islandora/solution_pack_config/basic_collection)
- Under “Sort field for collection query”, enter your chosen field followed by “asc” or “desc”. For dates, use the _dt version of the field. For other field types, use _ss.
- Use "mods_titleInfo_title_ss asc” to sort by title A-Z.
- Use “mods_originInfo_dateIssued_dt desc” to sort by date, newest to oldest.
- If you want to be able to configure different sort strings for individual collections, check “Allow individual sort strings per collection”
- Manage the collection that you want to sort differently
- On the Collection tab, choose Set Solr Sort String
- Enter a sortable string (ends with _ss) followed by "asc" or "desc" to use for sorting this collection.
- If you want to use the Islandora Sort block to allow multiple sort fields, enable it at Structure -> Blocks. Choose the sort fields under "Sort Settings" in the Solr configuration screen (admin/islandora/search/islandora_solr/settings).