fix transfer script

apps/partner/transfer_data.py

@@ -1,7 +1,7 @@
 from pprint import pprint
 
 from establishment.models import Establishment
-from partner.models import Partner
+from partner.models import Partner, PartnerToEstablishment
 from transfer.models import EstablishmentBacklinks
 from transfer.serializers.partner import PartnerSerializer
 
@@ -33,6 +33,20 @@ def transfer_partner():
     else:
         pprint(f"Partner serializer errors: {serialized_data.errors}")
 
+    # here we manually delete duplicates
+    partners_to_remove_ids = []
+    for partner_establishment_proxy in PartnerToEstablishment.objects.all():
+        related_partner = partner_establishment_proxy.partner
+        actual_partner = Partner.objects.filter(type=related_partner.type,
+                                                url=related_partner.url,
+                                                name=related_partner.name).first()  # exists for sure
+        if related_partner.pk != actual_partner.pk:
+            partners_to_remove_ids.append(related_partner.pk)
+        partner_establishment_proxy.partner = actual_partner
+        partner_establishment_proxy.save()
+
+    Partner.objects.filter(id__in=partners_to_remove_ids).delete()
+
 
 data_types = {
     "partner": [transfer_partner]