From 0605051a6203c1fbf73dd894be62a55628b11613 Mon Sep 17 00:00:00 2001
From: "robin.keunen" <robin@keunen.net>
Date: Wed, 9 Sep 2020 16:11:52 +0200
Subject: [PATCH] [IMP] res_partner.export reference is unique

---
 csv_export_base/models/res_partner.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/csv_export_base/models/res_partner.py b/csv_export_base/models/res_partner.py
index c9800af..da92451 100644
--- a/csv_export_base/models/res_partner.py
+++ b/csv_export_base/models/res_partner.py
@@ -9,6 +9,11 @@
 class ResPartner(models.Model):
     _inherit = "res.partner"
 
+    _sql_constraints = [
+        ('partner_export_reference_unique', 'UNIQUE (export_reference)',
+         'The export reference must be unique!'),
+    ]
+
     def _default_export_reference(self):
         return self.env["ir.sequence"].next_by_code(
             "res.partner.export.reference"