I would like to create grails domain classes from an existing database, normally i was creating database from domain classes now i need to create it from an existing database schema. Please help me if there is any command available for that.
I'm on the same problem and I've found this Grails plugin: http://grails-plugins.github.com/grails-db-reverse-engineer/docs/manual/guide/single.html. It works perfectly: it inspects the existent database and creates domain classes, all ready to go. Just follow the steps showed in the example and you're done.
There is a tool called GRAG: http://grag.sourceforge.net
Perhaps this might help.
- add plugin (runtime ':db-reverse-engineer:3.0.0') in buildconfig.groovy
- Change Hibernate version from hibernate4:4.3.6.1 to hibernate:3.6.10.18
- Define package config in config.groovy to generate domain class grails.plugin.reveng.packageName="com.app.promotion"
- List the tables, you want to generate domain classes in config.groovy grails.plugin.reveng.includeTables=["promotion","event","promotionexecutionstrategy"]
- Define the shcema config in config.groovy grails.plugin.reveng.defaultSchema=”t0006”
- Then execute the command “grails -Dgrails.env=development db-reverse-engineer”. Here development is the environment in the datasource.
- After complete these steps we can see the domain classes in the package as we defined list items.
来源：https://stackoverflow.com/questions/5454897/grails-domain-class-creation-from-database