Full membership support

apps/note/admin.py

@@ -138,6 +138,13 @@ class TransactionAdmin(PolymorphicParentModelAdmin):
         return []
 
 
+@admin.register(MembershipTransaction)
+class MembershipTransactionAdmin(PolymorphicChildModelAdmin):
+    """
+    Admin customisation for Transaction
+    """
+
+
 @admin.register(TransactionTemplate)
 class TransactionTemplateAdmin(admin.ModelAdmin):
     """

apps/note/models/transactions.py

@@ -140,6 +140,7 @@ class Transaction(PolymorphicModel):
         max_length=255,
         default=None,
         null=True,
+        blank=True,
     )
 
     class Meta: