class Address { AddressType addressType Supplier supplier Person person Site site String street1 = '' String street2 = '' String city = '' String state = '' String postCode = '' String country = '' // hasMany = [] static belongsTo = [Supplier, Person, Site] static constraints = { street1(blank:false,maxSize:50) street2(maxSize:50) city(blank:false,maxSize:50) state(blank:false,maxSize:50) postCode(blank:false,maxSize:50) country(blank:false,maxSize:50) supplier(nullable:true) person(nullable:true) site(nullable:true) } String toString() { "${this.addressType}: ${this.street1}, ${this.city}" } }