Increased the number of terms facets returned by the Elasticsearch backend to 100 from the default 10 to work around an issue upstream.

This is hopefully only temporary until it's fixed in Elasticsearch, see elastic/elasticsearch#1776.

Author: jezdez

docs/backend_support.rst

@@ -46,7 +46,7 @@ Elasticsearch
 * Automatic query building
 * "More Like This" functionality
 * Term Boosting
-* Faceting
+* Faceting (up to 100 facets)
 * Stored (non-indexed) fields
 * Highlighting
 * Spatial search

haystack/backends/elasticsearch_backend.py

@@ -325,6 +325,7 @@ def build_search_kwargs(self, query_string, sort_by=None, start_offset=0, end_of
                 kwargs['facets'][facet_fieldname] = {
                     'terms': {
                         'field': facet_fieldname,
+                        'size': 100,
                     },
                 }