Send email and work with Excel in Grails, Learn Gradle
GORM without Grails, GORM without hasMany, Grails without GORM 🙃
Deep dive into Grails 3 + AngularJS.
Asciidoc tricks, Grails API Versioning, iOS and Android, Groovy Bean Configuration with Spring 4
Groovy Static Website Builders, Groovy DSLs, Grails 3, Custom Databinding, Custom TagLibs
Grails Plugins, Grails + Geb and lots of Spock: Async, timeouts, suites
Groovy Indy, Grails Asset Pipeline Plugin and the incredible creating your first Grails 3 application Guide
Grails Command Objects: Parameter validation, data binding, type conversion and dependency injection.
Application profiles, because there is more to Grails than just Monolith apps
Groovy and XML. Read it, Write, XMLParser, XMLSlurper, MarkupBuilder, StreamingMarkupBuilder ...