a

finance/serializers.py

@@ -6,6 +6,8 @@ from finance.models import Bill, Invoice
 class BillSerializer(serializers.ModelSerializer):
     opener = serializers.SerializerMethodField()
     user = serializers.SerializerMethodField()
+    course = serializers.SerializerMethodField()
+    invoices = serializers.SerializerMethodField()
 
     class Meta:
         model = Bill
@@ -15,6 +17,14 @@ class BillSerializer(serializers.ModelSerializer):
     def get_user(self):
         return self.user.email
 
+    @staticmethod
+    def get_course(self):
+        return self.course.title
+
+    @staticmethod
+    def get_invoices(self):
+        return [InvoiceSerializer(i).data for i in self.invoice_set.all()]
+
     @staticmethod
     def get_opener(self):
         return self.opener.email