work in progres

base_partner_merge/models/__init__.py

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+# -*- coding: utf-8 -*-
+
+from . import res_partner
+from . import base_partner_merge_automatic_wizard

base_partner_merge/models/base_partner_merge_automatic_wizard.py

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+# -*- coding: utf-8 -*-
+# © 2017 Sunflower IT <http://sunflowerweb.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from openerp import fields, models, api
+from ast import literal_eval
+
+
+class MergePartnerAutomatic(models.TransientModel):
+    _inherit = 'base.partner.merge.automatic.wizard'
+
+    # Enable deduplicating by reference
+    group_by_ref = fields.Boolean('Reference')
+
+    @api.multi
+    def _process_query(self, query):
+        ret = super(MergePartnerAutomatic, self)._process_query(query)
+
+        # If 'extra_domain', deduplicate only the records matching the domain
+        extra_domain = self.env.context.get('extra_domain', [])
+        if extra_domain:
+            for line in self.line_ids:
+                aggr_ids = literal_eval(line.aggr_ids)
+                domain = [('id', 'in', aggr_ids)]
+                domain.extend(extra_domain)
+                records = self.env['res.partner'].search(domain)
+                if len(records) < len(aggr_ids):
+                    line.unlink()
+        return ret

base_partner_merge/models/res_partner.py

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+# -*- coding: utf-8 -*-
+# © 2017 Sunflower IT <http://sunflowerweb.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from openerp import models, api
+
+
+class ResPartner(models.Model):
+    _inherit = 'res.partner'
+
+    @api.model
+    def deduplicate_on_field(self, field, domain=[]):
+        """ Merge contacts"""
+        self.merge_wizard = \
+            self.env['base.partner.merge.automatic.wizard']
+        wizard_id = self.merge_wizard.with_context(
+            extra_domain=domain).create({
+                'group_by_%s' % (field,): True,
+                'state': 'option'
+            })
+        wizard_id.automatic_process_cb()