[update] security rule

security/partner_security.xml

@@ -15,7 +15,7 @@
     <record id="res_partner_vendor" model="ir.rule">
         <field name="name">res.partner.vendor</field>
         <field name="model_id" ref="base.model_res_partner" />
-        <field name="domain_force">['|',('user_id', '=', user.id), ('partner_share', '=', False)]</field>
+        <field name="domain_force">['|', '|', ('user_id', '=', user.id), ('partner_share', '=', False), ('is_purchasing_centre', '=', True)]</field>
         <field name="groups" eval="[(4, ref('emgidi_partner.group_partner_vendor'))]" />
     </record>
 </odoo>