gsp - Grails: How to define a domain property rendered on views but not persisted? -

i have domain classes, let's say:

class person {   string name   integer age   //car data needs shown , filled in views    //but not persisted in person class   string model   string color    static afterinsert = {     def car = new car(model: model, color: color)     car.save()   } }  class car {   string model   string color   } 

what need show in person views (create , edit) model , color properties defined inside person class these doesn't have persisted class. these data, model , color, have persisted using car domain class maybe using afterinsert event. in other words, need save data domain class using views domain class.

thanks in advance.

you can use transients on properties want gorm ignore, example

class person {    static transients = ['model', 'color']    string name   integer age   //car data needs shown , filled in views    //but not persisted in person class   string model   string color   .. } 

just curious there reason you're not using associations

class person {   ..   static hasmany = [cars: car] }  class car {   ..   static belongsto = [person]    static hasmany = [drivers: person] } 

.. or composition

class person {   car car } 

or data binding multiple domains

//params passed controller /personcarcontroller/save?person.name=john&age=30&car.model=honda&car.color=red  //in controller def person = new person(params.person) def car = new car(params.car)