From 64185e6890f4310a01755671a4d17238ec7ae6d2 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.be>
Date: Wed, 28 May 2014 18:26:53 +0200
Subject: [PATCH] Add method for attach stars count to projects queryset.

---
 taiga/projects/stars/services.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/taiga/projects/stars/services.py b/taiga/projects/stars/services.py
index 937ac526..98e335cc 100644
--- a/taiga/projects/stars/services.py
+++ b/taiga/projects/stars/services.py
@@ -80,3 +80,21 @@ def get_starred(user_or_id):
         qs = qs.filter(fans__user=user_or_id)
 
     return qs
+
+
+def attach_startscount_to_queryset(queryset):
+    """
+    Attach stars count to each object of projects queryset.
+
+    Because of lazynes of starts objects creation, this makes
+    much simple and more efficient way to access to project
+    starts number.
+
+    (The other way was be do it on serializer with some try/except
+    blocks and additional queryes)
+    """
+    sql = ("SELECT coalesce(stars_stars.count, 0) FROM stars_stars "
+           "WHERE stars_stars.project_id = projects_project.id ")
+    qs = queryset.extra(select={"starts_count": sql})
+    return qs
+