code: def cmd_rename(old_docid, new_docid):
      
      dsearch = get_docsearch()
      doc = dsearch.get(old_docid)
      if doc is None:
          raise Exception(
              "Document {} not found. Cannot remove label from it".format(
                  old_docid
              )
          )
  
      index_updater = dsearch.get_index_updater(optimize=False)
  
      # just clone the in-memory data, not the on-disk content
      clone = doc.clone()
  
      # so we can change the ID safely
      doc.docid = new_docid
  
      index_updater.del_doc(clone)
      index_updater.add_doc(doc)
      index_updater.commit()
  
      verbose("Document {} renamed into {}".format(old_docid, new_docid))
      reply({
          "old_docid": old_docid,
          "new_docid": new_docid
      })
docs: Arguments: <current document_id> <new document_id>
  
      Change the ID of a document.
  
      Note that the document id are also their date.
      Using an ID that is not a date may have side effects
      (the main one being the document won't be sorted correctly).
  
      Possible JSON replies:
          --
          {
              "status": "error", "exception": "yyy",
              "reason": "xxxx", "args": "(xxxx, )"
          }
          --
          {
              "status": "ok",
              "old_docid": "xxxx",
              "new_docid": "yyyy",
          }