I haven't used it personally, but for fine grained control you might want to look at using either ICUCollationField or CollationField as documented here: https://solr.apache.org/guide/8_10/language-analysis.html#sorting-text-with-custom-rules
There is a write up about implementing a custom sort order using ICUCollectionField here: https://dzone.com/articles/customize-sorting-order-with-rulebasedcollation-in - Andy - On Tue, Feb 1, 2022 at 8:37 AM Markus Jelsma <markus.jel...@openindex.io> wrote: > Hello Sebastian, > > This the natural sort order, just look at an ASCII-table. If you want > charachters nicely bundled together you can either make a complicated > Comparator or CopyField the original string value to a analyzed Text field > that has a KeywordTokenizer, and an ASCIIFoldingFilter configured. > > Sort on that field, and do a secondary sort on the original field to take > care of the cases. > > Regards, > Markus > > Op di 1 feb. 2022 om 13:07 schreef Sebastian Riemer <s.rie...@littera.eu>: > > > I am using Solr 8.10 > > > > > > LITTERA Software & Consulting GmbH > > > > A-6060 Hall i.T., Haller Au 19a > > Telefon: +43 (0) 50 765 000, Fax: +43 (0) 50 765 118 > > Sitz: Hall in Tirol, eingetragen beim Handelsgericht Innsbruck, > > Firmenbuch-Nr. FN 295807k, geschäftsführender Gesellschafter: Albert > > Unterkircher, MSc > > > > D-80687 München, Landsberger Straße 155 > > Telefon: +49 (0) 89 919 29 122, Fax: +49 (0) 89 919 29 123 > > Sitz: München, eingetragen beim Amtsgericht München > > unter HRB 103698, Geschäftsführer: Albert Unterkircher > > E-Mail: s.rie...@littera.eu > > Homepage:www.littera.eu > > > > Diese Nachricht kann vertrauliche, nicht für die Veröffentlichung > > bestimmte und/oder rechtlich geschützte Informationen enthalten. Falls > Sie > > nicht der beabsichtigte Empfänger sind, beachten Sie bitte, dass jegliche > > Veröffentlichung, Verbreitung oder Vervielfältigung dieser Nachricht > > strengstens untersagt ist. Sollten Sie diese Nachricht irrtümlich > erhalten > > haben, informieren Sie bitte sofort den Absender durch Anruf oder > > Rücksendung der Nachricht und vernichten Sie diese. > > > > This communication may contain information that is legally privileged, > > confidential or exempt from disclosure. If you are not the intended > > recipient, please note that any dissemination, distribution or copying of > > this communication is strictly prohibited. Anyone who receives this > > message in error should notify the sender immediately by telephone or by > > return e-mail and delete this communication entirely from his or her > > computer. > > > > -----Ursprüngliche Nachricht----- > > Von: Sebastian Riemer <s.rie...@littera.eu> > > Gesendet: Dienstag, 1. Februar 2022 12:58 > > An: solr-u...@lucene.apache.org > > Betreff: Customize sort-behaviour on solr.StrField for German language > > > > Hello, > > > > I have documents with family names in german language context. > > The field type is defined like this: <fieldType name="string" > > class="solr.StrField" sortMissingLast="true" /> > > > > When sorting by this family name, I get results ordered like that: > > > > Ascending order: > > 1. Bart > > 2. Otz > > 3. Ozzbourne > > 4. Zacharias > > 5. bariton > > 6. biene > > 7. burtsch > > 8. ozza > > 9. Ádele > > 10. Òle > > 11. Ônna > > 12. Ötz > > 13. ägnie > > 14. órthega > > > > So, the ordering is: > > > > 1. A-Z (Uppercase) > > 2. a-z (Lowercase) > > 3. Umlauts and special accents > > > > That ordering seems suprising to me, I'd prefer it like this: > > > > 1. aäàâ-z (Lowercase) > > 2. AÄÀÂ-Z (Uppercase) > > > > Or in other words, lowercase before uppercase, and Umlauts and Special > > accents after its "natural character". > > > > Here is the full query fort he above example: > > > > start=0 > > &rows=50 > > &fq=tenant_id:1 > > &fq=u_markedAsDeleted_b:false > > > > > &fq={!tag%3Du_cg_customergroup_0}(((u_customerGroupMemberships_customergroup_cp_ts_ns:(24)))) > > &fq=u_id_cp_s:[*+TO+*]&q=*:* > > &facet=true > > &facet.missing=true > > &facet.sort=count > > &facet.mincount=1 > > &sort=u_familyName_cp_s+asc,u_userName_cp_s+desc > > > > > &qf=u_userName_cp_s^20+u_displayName_cp_s^20++text^2+text_en+text_de+text_it > > &pf=u_userName_cp_s^100+u_displayName_cp_s^20++text^10 > > &mm=100%25 > > > > > > Could you please give me some direction which parts of the documentation > I > > can study to learn about sorting and how to achieve a custom sorting? > > > > Thank you and best regards, > > > > Sebastian > > > > >
