workflows: fix attachements xml import on sendmail action (#20319)

tests/test_workflow_import.py

@@ -477,6 +477,22 @@ def test_sendmail_other_destination(pub):
     assert Role.count() == 0
     assert wf2.possible_status[0].items[0].to == sendmail.to
 
+def test_sendmail_attachments(pub):
+    wf = Workflow(name='status')
+    st1 = wf.add_status('Status1', 'st1')
+
+    sendmail = SendmailWorkflowStatusItem()
+    st1.items.append(sendmail)
+    sendmail.parent = st1
+
+    sendmail.attachments = ['form_var_file_raw', 'form_fbo1']
+    wf2 = assert_import_export_works(wf)
+    assert wf2.possible_status[0].items[0].attachments == sendmail.attachments
+
+    sendmail.attachments = []
+    wf2 = assert_import_export_works(wf)
+    assert wf2.possible_status[0].items[0].attachments == []
+
 def test_sms(pub):
     wf = Workflow(name='status')
     st1 = wf.add_status('Status1', 'st1')

wcs/workflows.py

@@ -2054,6 +2054,12 @@ class SendmailWorkflowStatusItem(WorkflowStatusItem):
         return super(SendmailWorkflowStatusItem, self)._get_role_id_from_xml(
                 elem, charset, include_id=include_id)
 
+    def attachments_init_with_xml(self, elem, charset, include_id=False):
+        if elem is None:
+            self.attachments = None
+        else:
+            self.attachments = [item.text.encode(charset) for item in elem.findall('attachment')]
+
     def render_list_of_roles_or_emails(self, roles):
         t = []
         for r in roles: