GITC-675: Creating index for column contributor_address for faster qu… (#9881)

* GITC-675: Creating index for column contributor_address for faster querying.

* GITC-675: Simplifying the query, and query building

Author: nutrina

app/grants/migrations/0133_auto_20211214_1413.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.24 on 2021-12-14 14:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('grants', '0132_auto_20211203_1427'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='subscription',
+            index=models.Index(fields=['contributor_address'], name='grants_subs_contrib_d72508_idx'),
+        ),
+    ]

app/grants/models/subscription.py

@@ -617,3 +617,8 @@ def create_contribution(self, tx_id, is_successful_contribution=True):
 
         update_grant_metadata.delay(self.pk)
         return contribution
+
+    class Meta:
+        indexes = [
+            models.Index(fields=['contributor_address',]),
+        ]

app/grants/views.py

@@ -3752,11 +3752,7 @@ def get_trust_bonus(request):
         except:
             return allow_all_origins(HttpResponse(status=400))
 
-    query = Q()
-    for address in addresses:
-        query |= Q(contributor_address=address)
-
-    subscriptions = Subscription.objects.filter(query).prefetch_related('contributor_profile')
+    subscriptions = Subscription.objects.filter(contributor_address__in=addresses).prefetch_related('contributor_profile')
     response = []
     _addrs = []
     for subscription in subscriptions: