How to get topic in a post

#1 
{"_id":"cat","startUrl":["https://scratch.mit.edu/discuss/16/"],"selectors":[{"id":"next_page","type":"SelectorLink","selector":"div.linksb div.pagination a","parentSelectors":["_root","next_page"],"multiple":true,"delay":0},{"id":"theme","type":"SelectorElement","selector":"tr:nth-of-type(1) div.tclcon","parentSelectors":["next_page"],"multiple":true,"delay":0},{"id":"author","type":"SelectorText","selector":"span.byuser","parentSelectors":["theme"],"multiple":false,"regex":"","delay":0},{"id":"title","type":"SelectorText","selector":"h3.topic_isread a","parentSelectors":["theme"],"multiple":false,"regex":"","delay":0},{"id":"item","type":"SelectorLink","selector":"h3.topic_isread a","parentSelectors":["theme"],"multiple":false,"delay":0},{"id":"first_post","type":"SelectorText","selector":"div#p1949852.blockpost div.post_body_html","parentSelectors":["item"],"multiple":false,"regex":"","delay":0}]}

website is https://scratch.mit.edu/discuss/16/
this is my graph but it return null when get a topic in a post

1
1.png825×215 9.64 KB

2
2.png1732×501 23.9 KB

#2

Hi!

You're having 'null' data because you set different page as a parent object. An Element selector is a container for a selectors inside, it serves them as a wrapper.

If you set your theme selector as a Link selector, your sitemap will return proper results.