Viewing the generated source code

Debugging GSP code with a debugger

Viewing information about templates used to render a single url

GSP templates are re-used in large web applications by using the g:render taglib. A lot of small templates can be used to render a single page. It might be hard to find out what gsp template actually renders the html seen in the result. The debug templates -feature adds html comments to the output. The comments contain debug information about gsp templates used to render the page.

Usage is simple: append "?debugTemplates" or "&debugTemplates" to the url and view the source of the result in your browser. "debugTemplates" is restricted to development mode. It won't work in production.

Here is an example of comments added by debugTemplates :

<!-- GSP #2 START template: /home/user/sampleapp/grails-app/views/_carousel.gsp precompiled: false lastmodified: 22.6.2010 10:45 -->
.
.
.
<!-- GSP #2 END template: /home/user/sampleapp/grails-app/views/_carousel.gsp rendering time: 115 ms -->

Each comment block has a unique id so that you can find the start & end of each template call.