From 8fc97b99b213620caad985547002ffebcc61e03b Mon Sep 17 00:00:00 2001
From: Stewart Douglas <sdouglas@quantopian.com>
Date: Thu, 6 Aug 2015 13:26:29 -0400
Subject: [PATCH] MAINT: Default constraints=True in AssetDBWriter

---
 zipline/assets/asset_writer.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/zipline/assets/asset_writer.py b/zipline/assets/asset_writer.py
index 0dadafa3..e8ec6e7b 100644
--- a/zipline/assets/asset_writer.py
+++ b/zipline/assets/asset_writer.py
@@ -98,7 +98,7 @@ class AssetDBWriter(with_metaclass(ABCMeta)):
     def write_all(self,
                   engine,
                   fuzzy_char=None,
-                  constraints=False):
+                  constraints=True):
         """ Write pre-supplied data to SQLite.
 
         Parameters
@@ -163,7 +163,7 @@ class AssetDBWriter(with_metaclass(ABCMeta)):
             (rec['sid'], 'equity') for rec in recs
         ]).execute(bind=bind)
 
-    def init_db(self, engine, constraints=False):
+    def init_db(self, engine, constraints=True):
         """Connect to database and create tables.
 
         Parameters