From c33f8f67964a1a9bc26c3adffad82eeec3c21e68 Mon Sep 17 00:00:00 2001
From: Allen Short <ashort@mozilla.com>
Date: Wed, 21 Mar 2018 20:38:48 +0000
Subject: [PATCH] properly rollback failed db commits

---
 redash/handlers/dashboards.py   | 5 +++++
 redash/handlers/data_sources.py | 2 ++
 redash/handlers/users.py        | 3 ++-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/redash/handlers/dashboards.py b/redash/handlers/dashboards.py
index 24e347477e..a5bd05038f 100644
--- a/redash/handlers/dashboards.py
+++ b/redash/handlers/dashboards.py
@@ -10,6 +10,7 @@
 from redash.permissions import (can_modify, require_admin_or_owner,
                                 require_object_modify_permission,
                                 require_permission)
+from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm.exc import StaleDataError
 
 
@@ -198,7 +199,11 @@ def post(self, dashboard_slug):
         try:
             models.db.session.commit()
         except StaleDataError:
+            models.db.session.rollback()
             abort(409)
+        except IntegrityError:
+            models.db.session.rollback()
+            abort(400)
 
         result = serialize_dashboard(dashboard, with_widgets=True, user=self.current_user)
 
diff --git a/redash/handlers/data_sources.py b/redash/handlers/data_sources.py
index 3862d1a6ef..cd80891be3 100644
--- a/redash/handlers/data_sources.py
+++ b/redash/handlers/data_sources.py
@@ -55,6 +55,7 @@ def post(self, data_source_id):
         try:
             models.db.session.commit()
         except IntegrityError as e:
+            models.db.session.rollback()
             if req['name'] in e.message:
                 abort(400, message="Data source with the name {} already exists.".format(req['name']))
 
@@ -127,6 +128,7 @@ def post(self):
 
             models.db.session.commit()
         except IntegrityError as e:
+            models.db.session.rollback()
             if req['name'] in e.message:
                 abort(400, message="Data source with the name {} already exists.".format(req['name']))
 
diff --git a/redash/handlers/users.py b/redash/handlers/users.py
index cabbe39dc5..2100cd4e86 100644
--- a/redash/handlers/users.py
+++ b/redash/handlers/users.py
@@ -135,6 +135,7 @@ def post(self):
             models.db.session.add(user)
             models.db.session.commit()
         except IntegrityError as e:
+            models.db.session.rollback()
             if "email" in e.message:
                 abort(400, message='Email already taken.')
             abort(500)
@@ -250,7 +251,7 @@ def post(self, user_id):
                 message = "Email already taken."
             else:
                 message = "Error updating record"
-
+            models.db.session.rollback()
             abort(400, message=message)
 
         self.record_event({