[9.0][FIX] partner_sector: add string to parent_id.

partner_sector/__openerp__.py

@@ -6,7 +6,7 @@
 {
     "name": "Partner Sector",
     "summary": "Add partner sectors",
-    "version": "9.0.1.0.1",
+    "version": "9.0.1.0.2",
     "category": "Customer Relationship Management",
     "website": "http://www.tecnativa.com",
     "author": "Tecnativa, Odoo Community Association (OCA)",

partner_sector/models/res_partner_sector.py

@@ -15,7 +15,8 @@ class ResPartnerSector(models.Model):
     _description = "Sector"
 
     name = fields.Char(required=True, translate=True)
-    parent_id = fields.Many2one(comodel_name='res.partner.sector',
+    parent_id = fields.Many2one(string='Parent',
+                                comodel_name='res.partner.sector',
                                 ondelete='restrict')
     child_ids = fields.One2many(comodel_name='res.partner.sector',
                                 inverse_name='parent_id',