The new Grails Version 1.2 was release right before Christmas 2009.
Compared to the time-consuming and nerve-wracking Grails Upgrade from 1.0 to 1.1 that users experienced, the upgrade to Version 1.2 is a lot easier.
This time the major showstopper is a bug in Grails’ build-in datepicker (see GRAILS-5593 and GRAILS-5610). This issue is already fixed in 1.2.1 trunk. So if you use the datepicker in your app, you should probably wait with the upgrade until 1.2.1 is released – which is scheduled to be released end of january 2010.
Some other issues that users could experience when upgrading to Grails 1.2 are listed in Robert Fletcher’s Blog:
http://adhockery.blogspot.com/2010/01/upgrading-grails-11-12.html
The main imprevements in Grails 1.2 are:
- Spring 3 integration
- Dependency resolution DSL
- Per-method transactions in services
- GORM improvements (e.g. Named Query Support)
- Performance optimizations (GSP rendering improvements, GSPs are now precompiled)
Full changelog can be found at the Grails website:
http://www.grails.org/1.2+Release+Notes
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