174-            elif campaign.attachment_id:
175-                att = db.get(Attachment, campaign.attachment_id)
176-                if att and att.kind == "html":
177:                    att_html = engine.substitute(att.html_attachment_body or "", rec, g,
178-                                                 custom_fields=cf,
179-                                                 extra={"unsubscribe_link": unsub_url}).text
180-            if att_html:
181-                pdf_bytes = message_builder.html_to_pdf(att_html)
182-                fname = message_builder.generate_attachment_filename(
183-                    var_cfg.get("attachment_kind", "invoice"), cr.generated_invoice_number)
184-                attachments.append({"filename": fname, "content": pdf_bytes,
185-                                    "mime_type": "application/pdf"})
186-                att_names.append(fname)
187-        if campaign.attach_mode in ("file", "image") and campaign.attachment_id:
188-            att = db.get(Attachment, campaign.attachment_id)
189-            if att: