partial() doesn't render correctly, and how to debug geddy?

[night-wan]

After I replaced some .css files and rewrote application.html.ejs, I found that the content of form.html was replaced by "###partial###"+id. It happens to both add and edit of all my models . No exception thrown, no error logged.
Anybody have any idea where the problem possibly is?

besides, how can I single-step debug geddy? I tried installing geddy locally in my program directory, importing the project into webstorm, and editting the debug configuration by setting js file to "\node_modules\geddy\bin\cli.js". By clicking debug icon, the server seems started successfully, but can't be visited by browser