From bafc7adacb4e60a2002c6afa272c38177367ac25 Mon Sep 17 00:00:00 2001
From: jmartin <jmartin@zikzakmedia.com>
Date: Wed, 9 Jul 2014 12:10:25 +0200
Subject: [PATCH] Allow to pay a sale with amount 0

---
 sale.py | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/sale.py b/sale.py
index 745b886..2d87725 100644
--- a/sale.py
+++ b/sale.py
@@ -142,16 +142,17 @@ class WizardSalePayment(Wizard):
         if not sale.reference:
             Sale.set_reference([sale])
 
-        payment = StatementLine(
-            statement=statements[0].id,
-            date=Date.today(),
-            amount=form.payment_amount,
-            party=sale.party.id,
-            account=sale.party.account_receivable.id,
-            description=sale.reference,
-            sale=active_id
-            )
-        payment.save()
+        if form.payment_amount:
+            payment = StatementLine(
+                statement=statements[0].id,
+                date=Date.today(),
+                amount=form.payment_amount,
+                party=sale.party.id,
+                account=sale.party.account_receivable.id,
+                description=sale.reference,
+                sale=active_id
+                )
+            payment.save()
 
         if sale.total_amount != sale.paid_amount:
             return 'start'