Grails：AddTo 的问题

Question

我试图向自己证明 addTo 将同时保存添加的域对象及其父对象，并在父对象上进行保存。我构建了这个简单的测试：

package testapp

import grails.test.mixin.TestFor
import spock.lang.Specification

/**
 * See the API for {@link grails.test.mixin.domain.DomainClassUnitTestMixin} for usage instructions
 */
@TestFor(Person)
class PersonSpec extends Specification {

    def setup() {
    }


    def cleanup() {
    }

    void "test PersonCreation"() {
        when: "create a person with a hobby"
        Hobby h = new Hobby(name: "Fishing")
        Person p = new Person()
        p.first="Sam"
        p.last="Parker"
        p.age = 30
        p.addToHobby(h)
        p.save()
        then: "Hobby is saved as well"
        Hobby.count() == 1
    }
}

运行然而，它在 p.addToHobby(h) 处产生了这个错误行：

java.lang.NullPointerException
    at org.grails.datastore.gorm.GormEntity$Trait$Helper.addTo(GormEntity.groovy:350)
    at testapp.PersonSpec.test PersonCreation(PersonSpec.groovy:27)


Process finished with exit code 255

域类和您想象的一样简单：

人：

package testapp

class Person {

  String first
  String last
  Integer age

  static hasMany = [hobby: Hobby]

  static constraints = {}
}

爱好：

class Hobby {
    String name
    static constraints = {}
    static belongsTo = [person: Person]

}

我试过清理和重新编译，没有任何变化。（Grails 版本 3.2.2）

Answer 1

您需要为 Person 和 Hobby 添加 @Mock 注释。这会将动态方法（如 addTo）添加到域-类.

@Mock([Person, Hobby])
class PersonSpec extends Specification {
    ...your test code...
}

Grails：AddTo 的问题

Grails: trouble with AddTo

grails

grails-domain-class