added/removed content according to a given Version

https://pulp.plan.io/issues/5706
closes #5706

CHANGES/5706.feature

@@ -0,0 +1 @@
+List added/removed content according to a given RepositoryVersion

pulpcore/app/models/repository.py

@@ -449,19 +449,33 @@ def artifacts(self):
         """
         Artifact.objects.filter(content__pk__in=self.content)
 
-    def added(self):
+    def added(self, base_version=None):
         """
+        Args:
+            base_version (pulpcore.app.models.RepositoryVersion): an optional repository version
+
         Returns:
             QuerySet: The Content objects that were added by this version.
         """
-        return Content.objects.filter(version_memberships__version_added=self)
+        if not base_version:
+            return Content.objects.filter(version_memberships__version_added=self)
+        versions = RepositoryVersion.objects.filter(
+            number__in=range(base_version.number + 1, self.number + 1), repository=self.repository)
+        return Content.objects.filter(version_memberships__version_added__in=versions)
 
-    def removed(self):
+    def removed(self, base_version=None):
         """
+        Args:
+            base_version (pulpcore.app.models.RepositoryVersion): an optional repository version
+
         Returns:
             QuerySet: The Content objects that were removed by this version.
         """
-        return Content.objects.filter(version_memberships__version_removed=self)
+        if not base_version:
+            return Content.objects.filter(version_memberships__version_removed=self)
+        versions = RepositoryVersion.objects.filter(
+            number__in=range(base_version.number + 1, self.number + 1), repository=self.repository)
+        return Content.objects.filter(version_memberships__version_removed__in=versions)
 
     def contains(self, content):
         """