Grails 3 is a substantial and radical change in the Grails Ecosystem, and it requires some effort to migrate applications from Grails 2 to the newest version. This presentation explains which steps have to be taken and which ‘gotchas’ exist in the migration process. As well as the theory we will migrate an existing application that is productive and running with Grails 2 towards the newest version of Grails 3. This presentation will feature a few slides and tons of code.
