Grails - Object Relational Mapping (GORM)

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Description

The Grails is a full stack open source framework which uses Hibernate framework as well as implements its own Object Relational Mapping (ORM) layer for groovy known as GORM.

GORM is the persistence component of Grails for handling relational databases. The Object Relational Mapping is implemented in Grails called Domain Class.

In this chapter we will see how GORM implements its Object model in the domain class. You can create a domain class by using the following command:

grails create-domain-class Employee

The above command will create a file which looks like:

package first
class Employee {
}

Let's modify the generated file by adding the properties:

package first
class Employee {
    String Firstname
    Integer age
}

Once done, use the below command in shell or console to load an interactive GUI to run Groovy commands:

grails console