From 2a950f0da207179621b0517838064dc8a1aed439 Mon Sep 17 00:00:00 2001
From: Mike Grima <mgrima@netflix.com>
Date: Sat, 4 Jul 2020 12:36:14 -0700
Subject: [PATCH] Fixed circlular import with RDS and CF

---
 moto/rds/exceptions.py | 10 ++++++++++
 moto/rds/models.py     |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/moto/rds/exceptions.py b/moto/rds/exceptions.py
index cf9b9aac6..6fe30878b 100644
--- a/moto/rds/exceptions.py
+++ b/moto/rds/exceptions.py
@@ -36,3 +36,13 @@ class DBSubnetGroupNotFoundError(RDSClientError):
             "DBSubnetGroupNotFound",
             "Subnet Group {0} not found.".format(subnet_group_name),
         )
+
+
+class UnformattedGetAttTemplateException(Exception):
+    """Duplicated from CloudFormation to prevent circular deps."""
+
+    description = (
+        "Template error: resource {0} does not support attribute type {1} in Fn::GetAtt"
+    )
+
+    status_code = 400
diff --git a/moto/rds/models.py b/moto/rds/models.py
index 421f3784b..40b1197b6 100644
--- a/moto/rds/models.py
+++ b/moto/rds/models.py
@@ -3,10 +3,10 @@ from __future__ import unicode_literals
 import boto.rds
 from jinja2 import Template
 
-from moto.cloudformation.exceptions import UnformattedGetAttTemplateException
 from moto.core import BaseBackend, BaseModel
 from moto.core.utils import get_random_hex
 from moto.ec2.models import ec2_backends
+from moto.rds.exceptions import UnformattedGetAttTemplateException
 from moto.rds2.models import rds2_backends