How do I debug work of 2sxc if Visual Query works perfectly during debug, but cshtml code can't access data?

Question

I've edited some existing visual queries of Blog 4.0 application and when I was debugging it - it worked perfectly. But then on page it stopped working. Any attempt to use key with Data like Data["Posts"] raises System.Collections.Generic.KeyNotFoundException. App.Query["Blog Posts List"]["Posts"] returns something, but any attempt to access its fields raises another exception (don't remember the name, but it said that there's no such member inside that object). I didn't rename queries, I didn't change application settings. I just edited logic of 2 queries. I renamed 1 wiring endpoint name across 3 queries in whole chain. How do I debug it? How can I see what does cshtml receive from database so I don't guess and put my crystal ball away?

Answer 1

My bad: I confused two different files - _List.cshtml and _List Paging.cshtml. So I was searching for an error in the code of wrong file.