I'm fairly new to Grails and today was following a tutorial on spicing up Grails with Ajax (prototype). The tutorial was simple quote of the day Grails app that would asynchronously fetch random quote from the db. I've spent almost 3 hours getting ajax to work, finally got it to work with weird outcome. Basically, ajax wouldn't work unless I put the following two lines to both gsp of the view and gsp of the layout:
<g:javascript library="prototype" />
<r:layoutResources />
I tried to put the above lines into either one, but that wouldn't work. It had to be in both places. Is that the expected behavior of grails?
That's not the expected behaviour. Get the latest Grails version and use jQuery as described in the documentation: http://grails.org/doc/latest/guide/theWebLayer.html#6.7%20Ajax
Prototype can also be used, but jQuery is preferred since Grails 2.0.
A simple <g:javascript library="jquery" /> should then do the trick.
BTW: V2.0 is pretty new. Most tutorials and books are still refering to 1.3.7 . So if you run into problems, check the really fine manual. But don't get me wrong: most of the books and tutorials are still great and valuable - you should just consult the manual, too!