fix: add xref button to customer profile, for trainwreck txn view

tailbone/views/trainwreck/base.py

@@ -270,6 +270,23 @@ class TransactionView(MasterView):
 
         return kwargs
 
+    def get_xref_buttons(self, txn):
+        app = self.get_rattail_app()
+        clientele = app.get_clientele_handler()
+        buttons = super().get_xref_buttons(txn)
+
+        if txn.customer_id:
+            customer = clientele.locate_customer_for_key(Session(), txn.customer_id)
+            if customer:
+                person = app.get_person(customer)
+                if person:
+                    url = self.request.route_url('people.view_profile', uuid=person.uuid)
+                    buttons.append(self.make_xref_button(text=str(person),
+                                                         url=url,
+                                                         internal=True))
+
+        return buttons
+
     def get_row_data(self, transaction):
         return self.Session.query(self.model_row_class)\
                            .filter(self.model_row_class.transaction == transaction)