class Race {      String name     Date startDateTime     String city     String state     Float distance     Float cost     Integer maxRunners = 100000          static hasMany = [registrations:Registration]          static constraints = {         name(maxLength:50,blank:false)         startDateTime(validator: {return (it > new Date())})         city(maxLength:30,blank:false)         state(inList:['GA', 'NC', 'SC', 'VA'],blank:false)         distance(min:3.1f,max:100f)         cost(min:0f,max:999.99f)     }         String toString() { "${this.name} : ${this.city}, ${this.state}" }         }