From 013cd864c29d621a1e25cddb821d384e5fa6a935 Mon Sep 17 00:00:00 2001
From: Kuroshini <o.hayatov@id-east.ru>
Date: Tue, 3 Dec 2019 20:48:35 +0300
Subject: [PATCH] tags dynamic filters #2

---
 apps/search_indexes/filters.py | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/apps/search_indexes/filters.py b/apps/search_indexes/filters.py
index 3101fdc2..a12c37f7 100644
--- a/apps/search_indexes/filters.py
+++ b/apps/search_indexes/filters.py
@@ -149,25 +149,23 @@ class CustomFacetedSearchFilterBackend(FacetedSearchFilterBackend):
         result_bucket = buckets[0]
         for bucket in buckets[1:]:
             for tag in bucket.tag.buckets._l_:
-                if tag not in result_bucket.tag.buckets._l_:
-                    result_bucket.tag.buckets._l_.append(tag)
+                result_bucket.tag.buckets.append(tag)
+
         def reducer(prev, cur):
-            try:
-                index = list(map(lambda x: x['key'], prev)).index(cur['key'])
-                if cur['doc_count'] < prev[index]['doc_count']:
-                    prev[index]['doc_count'] = cur['doc_count']
-            except ValueError:
+            """Unique by key"""
+            if not len(list(filter(lambda x: x['key'] == cur['key'], prev))):
                 prev.append(cur)
             return prev
 
-        result_bucket.tag.buckets._l_ = list(reduce(
-            reducer, result_bucket.tag.buckets._l_, []
-        ))
-        result_bucket.doc_count = reduce(
-            lambda prev, cur: prev + cur['doc_count'],
+        buckets_count = len(buckets)
+        result_bucket.tag.buckets = list(filter(lambda t: t is not None, [
+            tag if len(list(filter(lambda t: t['key'] == tag['key'], result_bucket.tag.buckets._l_))) == buckets_count else None
+            for tag in result_bucket.tag.buckets._l_])) # here we remove tags which don't present in any bucket
+        result_bucket.tag.buckets = list(reduce(
+            reducer,
             result_bucket.tag.buckets._l_,
-            0
-        )
+            []
+        ))
         return result_bucket