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Xapian-haystack aims to bring Xapian search engine to the Haystack search API for Django.

Haystack features supported

"Supported" means implemented, unit tested, and documented (when required).

• Indexing
  • fields: BooleanField, CharField, FloatField, DateField, DateTimeField, MultivaluedField, DecimalField
  • spelling suggestions, word stems (multiple languages), literal words (e.g. url addresses)
• Search
  • content search in full document
  • search by fields
  • filtered search (__contains, __in, __exact, __startswith, all comparisons)
• Results
  • sort by field value, sort by score
  • custom Result classes
• Aggregation (facets)
  • computed in Xapian: facets
  • computed in Python: date facets, query facets, multivalued facets

Apart from __contains, filters work in the same way as Django. __contains has no equivalence in Django since both Django __contains and __search perform a boolean search, while Xapian uses a BM25 search.

Haystack features not supported

"Not supported" means either not implemented, not supported by Xapian, or not correctly unit tested.

• Highlight (see issue #34)
• EdgeNgram and Ngram (see issue #117)
• Spatial search (not supported)