Updated: Added logic to implement Interval Faceting (Solr only).

[dwasyl]

This is just a re-based version of #1510

Per stmos' original notes: This currently only works with Solr backend (>4.10).

More details about interval faceting can be found at: Solr - Interval Faceting

Example: intervals = ['[0,100]', '(100, *]'] sqs = SearchQuerySet() sqs.interval_facet('price', intervals=intervals)

Key replacement is supported as well: sqs.interval_facet('price', intervals=['{!key=cheap}[0, 100]', '{!key=expensive}[100, *)']).facet_counts()

Output: {u'dates': {}, u'fields': {}, u'intervals': {'price': {u'cheap': 4, u'expensive': 47}}, u'queries': {}}

Syntax is explained at the URL posted above. There is no need to specify the "facet=true" when defining the search index for the fields you want to use for interval faceting.

Only requirement is that fields used for Interval Faceting must have “docValues” enabled (not required for Solr 5.20 and above) @stmos