Implement chance culprit revision for backend.

Author: florinbilt

tests/webapp/api/test_performance_alertsummary_api.py

@@ -88,6 +88,7 @@ def test_alert_summaries_get(
         "related_alerts",
         "repository",
         "push_id",
+        "original_revision",
         "status",
         "revision",
         "push_timestamp",
@@ -167,6 +168,7 @@ def test_alert_summaries_get_onhold(
         "related_alerts",
         "repository",
         "push_id",
+        "original_revision",
         "status",
         "revision",
         "push_timestamp",

treeherder/webapp/api/performance_serializers.py

@@ -273,8 +273,11 @@ class PerformanceAlertSummarySerializer(serializers.ModelSerializer):
     )
     repository = serializers.SlugRelatedField(read_only=True, slug_field="name")
     framework = serializers.SlugRelatedField(read_only=True, slug_field="id")
-    revision = serializers.SlugRelatedField(read_only=False, slug_field="revision", source="push", required=False, queryset=Push.objects.all())
-    original_revision = serializers.SlugRelatedField(read_only=True, slug_field="revision", source="original_push")
+    revision = serializers.SlugRelatedField(read_only=False, slug_field="revision",
+                                            source="push",required=False,
+                                            queryset=Push.objects.all())
+    original_revision = serializers.SlugRelatedField(read_only=True, slug_field="revision",
+                                                     source="original_push")
     push_timestamp = TimestampField(source="push", read_only=True)
     prev_push_revision = serializers.SlugRelatedField(
         read_only=True, slug_field="revision", source="prev_push"