models: Add USER_FULL_NAME_CHANGED event type constant to RealmAuditLog.

zerver/lib/actions.py

@@ -2804,7 +2804,7 @@ def do_change_full_name(user_profile: UserProfile, full_name: str,
     user_profile.save(update_fields=["full_name"])
     event_time = timezone_now()
     RealmAuditLog.objects.create(realm=user_profile.realm, acting_user=acting_user,
-                                 modified_user=user_profile, event_type='user_full_name_changed',
+                                 modified_user=user_profile, event_type=RealmAuditLog.USER_FULL_NAME_CHANGED,
                                  event_time=event_time, extra_data=old_name)
     payload = dict(email=user_profile.email,
                    user_id=user_profile.id,

zerver/models.py

@@ -1968,6 +1968,7 @@ class RealmAuditLog(models.Model):
     USER_REACTIVATED = 'user_reactivated'
     USER_CHANGE_PASSWORD = 'user_change_password'
     USER_CHANGE_AVATAR_SOURCE = 'user_change_avatar_source'
+    USER_FULL_NAME_CHANGED = 'user_full_name_changed'
 
     event_type = models.CharField(max_length=40)  # type: str
 

zerver/tests/test_audit_log.py

@@ -69,7 +69,7 @@ class TestRealmAuditLog(ZulipTestCase):
         req = dict(full_name=ujson.dumps(new_name))
         result = self.client_patch('/json/users/{}'.format(self.example_user("hamlet").id), req)
         self.assertTrue(result.status_code == 200)
-        query = RealmAuditLog.objects.filter(event_type='user_full_name_changed',
+        query = RealmAuditLog.objects.filter(event_type=RealmAuditLog.USER_FULL_NAME_CHANGED,
                                              event_time__gte=start)
         self.assertEqual(query.count(), 1)