From c6529befe2aa8b06129674d857f1bb46cb594530 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 22 Jun 2015 16:59:25 +0200
Subject: [PATCH] Use Constraint instance in ModelSQL._sql_constraints

issue4814
review15491002
---
 currency.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/currency.py b/currency.py
index 03803b3313..8af9352807 100644
--- a/currency.py
+++ b/currency.py
@@ -4,7 +4,7 @@ import datetime
 import json
 
 from decimal import Decimal, ROUND_HALF_EVEN
-from trytond.model import ModelView, ModelSQL, fields
+from trytond.model import ModelView, ModelSQL, fields, Unique, Check
 from trytond.tools import datetime_strftime
 from trytond.transaction import Transaction
 from trytond.pool import Pool
@@ -254,10 +254,11 @@ class Rate(ModelSQL, ModelView):
     @classmethod
     def __setup__(cls):
         super(Rate, cls).__setup__()
+        t = cls.__table__()
         cls._sql_constraints = [
-            ('date_currency_uniq', 'UNIQUE(date, currency)',
+            ('date_currency_uniq', Unique(t, t.date, t.currency),
                 'A currency can only have one rate by date.'),
-            ('check_currency_rate', 'CHECK(rate >= 0)',
+            ('check_currency_rate', Check(t, t.rate >= 0),
                 'The currency rate must greater than or equal to 0'),
             ]
         cls._order.insert(0, ('date', 'DESC'))