request model knows its most recent review comment

atst/models/request.py

@@ -194,3 +194,13 @@ class Request(Base):
     @property
     def is_approved(self):
         return self.status == RequestStatus.APPROVED
+
+    @property
+    def review_comment(self):
+        if (
+            self.status == RequestStatus.CHANGES_REQUESTED
+            or self.status == RequestStatus.CHANGES_REQUESTED_TO_FINVER
+        ):
+            review = self.latest_status.review
+            if review:
+                return review.comment

tests/models/test_requests.py

@@ -92,3 +92,26 @@ def test_reviews():
         RequestStatusEventFactory.create(revision=request.latest_revision),
     ]
     assert len(request.reviews) == 2
+
+
+def test_review_comment():
+    request = RequestFactory.create()
+    ccpo = UserFactory.from_atat_role("ccpo")
+    request.status_events = [
+        RequestStatusEventFactory.create(
+            revision=request.latest_revision,
+            new_status=RequestStatus.CHANGES_REQUESTED,
+            review=RequestReviewFactory.create(reviewer=ccpo, comment="do better"),
+        )
+    ]
+    assert request.review_comment == "do better"
+
+    request.status_events = [
+        RequestStatusEventFactory.create(
+            revision=request.latest_revision,
+            new_status=RequestStatus.APPROVED,
+            review=RequestReviewFactory.create(reviewer=ccpo, comment="much better"),
+        )
+    ]
+
+    assert not request.review_comment