diff --git a/oshipka/persistance/__init__.py b/oshipka/persistance/__init__.py
index 5d43145..a249a9f 100644
--- a/oshipka/persistance/__init__.py
+++ b/oshipka/persistance/__init__.py
@@ -5,13 +5,12 @@ import re
 from json import JSONEncoder
 from uuid import uuid4
 
-from flask_sqlalchemy import SQLAlchemy
+from config import SQLALCHEMY_DATABASE_URI, MAKEDIRS, DATABASE_FILE
+from flask_security import RoleMixin, UserMixin
 from flask_security import Security, SQLAlchemyUserDatastore
+from flask_sqlalchemy import SQLAlchemy
 from markupsafe import escape, Markup
 from sqlalchemy.ext.declarative import declared_attr, DeclarativeMeta
-from flask_security import RoleMixin, UserMixin
-
-from config import SQLALCHEMY_DATABASE_URI, MAKEDIRS, DATABASE_FILE
 from sqlalchemy.orm.collections import InstrumentedList
 from sqlalchemy_utils import Choice
 from tww.tww import solve_query, resolve_timezone, dt_tz_translation, time_ago
@@ -64,7 +63,7 @@ class ModelController(ModelJsonEncoder):
     __mapper_args__ = {'always_refresh': True}
 
     id = db.Column(db.Integer, primary_key=True)
-    uuid = db.Column(db.Unicode, default=str(uuid4()))
+    uuid = db.Column(db.Unicode, index=True, default=lambda: str(uuid4()))
 
     _excluded_serialization = []
 
diff --git a/oshipka/webapp/async_routes.py b/oshipka/webapp/async_routes.py
index 5f45c56..a9b8dbb 100644
--- a/oshipka/webapp/async_routes.py
+++ b/oshipka/webapp/async_routes.py
@@ -10,6 +10,7 @@ from flask_table import Table, LinkCol, Col
 
 from oshipka.persistance import db
 from oshipka.webapp import test_bp, oshipka_bp
+from oshipka.webapp.views import catch_flash
 
 TASKS = {}
 
@@ -120,3 +121,9 @@ def stream(task_uuid):
             return jsonify({"error": "no task with uuid {}".format(task_uuid)}), 404
         return Response(tail(os.path.join(TASKS_BUF_DIR, task_uuid)), content_type='text/event-stream')
     return jsonify({"error": "Request has to contain 'Accept: text/event-stream' header"}), 400
+
+
+@test_bp.route("/div_error")
+@catch_flash
+def test_error():
+    return 1 / 0
diff --git a/oshipka/webapp/views.py b/oshipka/webapp/views.py
index f393013..f2e1ae0 100644
--- a/oshipka/webapp/views.py
+++ b/oshipka/webapp/views.py
@@ -1,3 +1,4 @@
+from functools import wraps
 from uuid import uuid4
 
 import inflect
@@ -138,3 +139,22 @@ class ModelView(object):
         self.app.add_url_rule(url, methods=["GET", "POST"],
                               endpoint='delete_{}'.format(self.model_name),
                               view_func=delete_view(self))
+
+
+def catch_flash(f):
+    @wraps(f)
+    def inner(*args, **kwargs):
+        try:
+            return f(*args, **kwargs)
+        except Exception as e:
+            flash(str(e), "error")
+        serialized_form = serialize_form()
+        if '_next' in serialized_form:
+            _next = serialized_form.pop('_next')
+        elif request.referrer and request.referrer != request.path:
+            _next = request.referrer
+        else:
+            _next = url_for('home')
+        return redirect(_next)
+
+    return inner