grails - Grails用户定义类型的域类属性的默认值

Question

我有一个域类计划，如下所示:

class Plan{
  String name
  static constraints={
    name(unique:true,nullable:false)
  }
}

另一个域类是User:

class User{
 // Other attribures and code
 // ....
 Plan plan
 static constraints = {
   // other constraints..
   plan(nullable:false, defaultValue: Plan.findByName("default"))
 }
}

上面的代码给我错误:

Caused by: java.lang.IllegalStateException: Method on class [mypackage.Plan] was used outside of a Grails application. If running in the context of a test using the mocking API or bootstrap Grails correctly.
at mypackage.User$__clinit__closure1.doCall(User.groovy:31)

上面错误的行是

plan(nullable:true,defaultValue: Plan.findByName("default"))

我也在BootStrap.groovy中定义了默认计划:

if(!Plan.findByName("default")){
            new Plan(name: "default",brandPartner: null,secRole: null).save(failOnError: true, flush: true)
            log.info("initPlans: No default plan found, hence created a new default plan!")
}

那么我应该如何设置计划属性(用户定义类型)的默认值？

Answer 1

使用拦截器代替约束:

class User{
  Plan plan
  static beforeInsert = {
    if( !plan ) Plan.withTransaction {
      plan = Plan.findByName 'default'
    }
  }
}