Implement get_billing_email_recipients

CHANGELOG.rst

@@ -6,6 +6,14 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
+`1.4.5`_
+--------
+
+Fixed
+~~~~~
+
+* Implement get_billing_email_recipients() to get invoices send to guardians
+
 `1.4.4`_
 --------
 
@@ -138,3 +146,4 @@ Added
 .. _1.4.1: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.1
 .. _1.4.2: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.2
 .. _1.4.3: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.3
+.. _1.4.5: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.5

aleksis/apps/paweljong/models.py

@@ -274,6 +274,9 @@ class EventRegistration(ExtensibleModel):
     def get_person(self):
         return self.person
 
+    def get_billing_email_recipients(self):
+        return [self.person.email] + list(self.person.guardians.values_list("email", flat=True))
+
     def get_invoice(self):
         # FIXME Maybe do not hard-code this
         client, __ = Client.objects.get_or_create(name="Teckids e.V.")