Grails 2.2.4：瞬态属性：为啥自定义验证器被调用两次？
Posted
技术标签:
【中文标题】Grails 2.2.4：瞬态属性：为啥自定义验证器被调用两次？【英文标题】：Grails 2.2.4: Transient Property: Why is the Custom Validator being called twice?Grails 2.2.4：瞬态属性：为什么自定义验证器被调用两次？ 【发布时间】：2016-05-13 08:35:53 【问题描述】：给定一个具有瞬态属性的简单域，例如：
package org.example.domain
class Ninja
String name
String sensei
static transients = ['name']
static constraints =
name nullable:false, bindable:true, validator: val, obj, errors ->
obj.log.error "[VALIDATING] 'name': $val, $obj FIRED!", new Exception()
sensei nullable:false, bindable:true, validator: val, obj, errors ->
obj.log.error "[VALIDATING] 'sensei': $val, $obj FIRED!", new Exception()
还有一个针对域约束的简单单元测试，如下：
package org.example.domain
import grails.test.mixin.Mock
import spock.lang.Specification
import grails.test.mixin.TestFor
@TestFor(Ninja)
class NinjaSpec extends Specification
def "Should not fire the name's custom validator twice"()
given:
def instance = new Ninja(name: 'Naruto',
sensei: 'Kakashi')
when:
instance.validate(['sensei'])
then:
instance.errors['name'] == null
当我运行这个规范时，它只是为了验证非瞬态属性 sensei，发生了两件意想不到的事情：
-
正在调用两个自定义验证器；
不仅名称的自定义验证器被调用，而且事实上，它被调用两次。
检查一下：
➜ grails test-app unit:spock -echoOut NinjaSpec
| Running 1 unit test... 1 of 1
--Output from Should not fire the name's custom validator twice--
2016-02-04 19:08:25.208 [main] grails.app.domain.org.example.domain.Ninja
ERROR [VALIDATING] 'name': Naruto, org.example.domain.Ninja : (unsaved) FIRED!
java.lang.Exception
at org.example.domain.Ninja$__clinit__closure1_closure2.doCall(Ninja.groovy:15)
at org.grails.datastore.gorm.GormValidationApi.doValidate(GormValidationApi.groovy:64)
at org.grails.datastore.gorm.GormValidationApi.validate(GormValidationApi.groovy:107)
at org.example.domain.NinjaSpec.$spock_feature_0_0(NinjaSpec.groovy:17)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.invokeFeatureMethod(BaseSpecRunner.java:285)
at org.spockframework.runtime.BaseSpecRunner.doRunIteration(BaseSpecRunner.java:256)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runIteration(BaseSpecRunner.java:223)
at org.spockframework.runtime.BaseSpecRunner.initializeAndRunIteration(BaseSpecRunner.java:214)
at org.spockframework.runtime.BaseSpecRunner.runSimpleFeature(BaseSpecRunner.java:205)
at org.spockframework.runtime.BaseSpecRunner.doRunFeature(BaseSpecRunner.java:199)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runFeature(BaseSpecRunner.java:175)
at org.spockframework.runtime.BaseSpecRunner.runFeatures(BaseSpecRunner.java:152)
at org.spockframework.runtime.BaseSpecRunner.doRunSpec(BaseSpecRunner.java:112)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runSpec(BaseSpecRunner.java:91)
at org.spockframework.runtime.BaseSpecRunner.run(BaseSpecRunner.java:82)
at org.spockframework.runtime.Sputnik.run(Sputnik.java:63)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.junit.runner.JUnitCore.run(JUnitCore.java:117)
at grails.plugin.spock.test.GrailsSpecTestType.doRun(GrailsSpecTestType.groovy:73)
at _GrailsTest_groovy$_run_closure4.doCall(_GrailsTest_groovy:290)
at _GrailsTest_groovy$_run_closure2.doCall(_GrailsTest_groovy:248)
at _GrailsTest_groovy$_run_closure1_closure21.doCall(_GrailsTest_groovy:195)
at _GrailsTest_groovy$_run_closure1.doCall(_GrailsTest_groovy:184)
at TestApp$_run_closure1.doCall(TestApp:82)
2016-02-04 19:08:25.216 [main] grails.app.domain.org.example.domain.Ninja
ERROR [VALIDATING] 'sensei': Kakashi, org.example.domain.Ninja : (unsaved) FIRED!
java.lang.Exception
at org.example.domain.Ninja$__clinit__closure1_closure3.doCall(Ninja.groovy:18)
at org.grails.datastore.gorm.GormValidationApi.doValidate(GormValidationApi.groovy:64)
at org.grails.datastore.gorm.GormValidationApi.validate(GormValidationApi.groovy:107)
at org.example.domain.NinjaSpec.$spock_feature_0_0(NinjaSpec.groovy:17)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.invokeFeatureMethod(BaseSpecRunner.java:285)
at org.spockframework.runtime.BaseSpecRunner.doRunIteration(BaseSpecRunner.java:256)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runIteration(BaseSpecRunner.java:223)
at org.spockframework.runtime.BaseSpecRunner.initializeAndRunIteration(BaseSpecRunner.java:214)
at org.spockframework.runtime.BaseSpecRunner.runSimpleFeature(BaseSpecRunner.java:205)
at org.spockframework.runtime.BaseSpecRunner.doRunFeature(BaseSpecRunner.java:199)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runFeature(BaseSpecRunner.java:175)
at org.spockframework.runtime.BaseSpecRunner.runFeatures(BaseSpecRunner.java:152)
at org.spockframework.runtime.BaseSpecRunner.doRunSpec(BaseSpecRunner.java:112)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runSpec(BaseSpecRunner.java:91)
at org.spockframework.runtime.BaseSpecRunner.run(BaseSpecRunner.java:82)
at org.spockframework.runtime.Sputnik.run(Sputnik.java:63)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.junit.runner.JUnitCore.run(JUnitCore.java:117)
at grails.plugin.spock.test.GrailsSpecTestType.doRun(GrailsSpecTestType.groovy:73)
at _GrailsTest_groovy$_run_closure4.doCall(_GrailsTest_groovy:290)
at _GrailsTest_groovy$_run_closure2.doCall(_GrailsTest_groovy:248)
at _GrailsTest_groovy$_run_closure1_closure21.doCall(_GrailsTest_groovy:195)
at _GrailsTest_groovy$_run_closure1.doCall(_GrailsTest_groovy:184)
at TestApp$_run_closure1.doCall(TestApp:82)
2016-02-04 19:08:25.223 [main] grails.app.domain.org.example.domain.Ninja
ERROR [VALIDATING] 'name': Naruto, org.example.domain.Ninja : (unsaved) FIRED!
java.lang.Exception
at org.example.domain.Ninja$__clinit__closure1_closure2.doCall(Ninja.groovy:15)
at org.grails.datastore.gorm.GormValidationApi.doValidate(GormValidationApi.groovy:64)
at org.grails.datastore.gorm.GormValidationApi.validate(GormValidationApi.groovy:107)
at org.example.domain.NinjaSpec.$spock_feature_0_0(NinjaSpec.groovy:17)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.invokeFeatureMethod(BaseSpecRunner.java:285)
at org.spockframework.runtime.BaseSpecRunner.doRunIteration(BaseSpecRunner.java:256)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runIteration(BaseSpecRunner.java:223)
at org.spockframework.runtime.BaseSpecRunner.initializeAndRunIteration(BaseSpecRunner.java:214)
at org.spockframework.runtime.BaseSpecRunner.runSimpleFeature(BaseSpecRunner.java:205)
at org.spockframework.runtime.BaseSpecRunner.doRunFeature(BaseSpecRunner.java:199)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runFeature(BaseSpecRunner.java:175)
at org.spockframework.runtime.BaseSpecRunner.runFeatures(BaseSpecRunner.java:152)
at org.spockframework.runtime.BaseSpecRunner.doRunSpec(BaseSpecRunner.java:112)
at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:138)
at org.spockframework.runtime.BaseSpecRunner.invokeRaw(BaseSpecRunner.java:330)
at org.spockframework.runtime.BaseSpecRunner.invoke(BaseSpecRunner.java:311)
at org.spockframework.runtime.BaseSpecRunner.runSpec(BaseSpecRunner.java:91)
at org.spockframework.runtime.BaseSpecRunner.run(BaseSpecRunner.java:82)
at org.spockframework.runtime.Sputnik.run(Sputnik.java:63)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.junit.runner.JUnitCore.run(JUnitCore.java:117)
at grails.plugin.spock.test.GrailsSpecTestType.doRun(GrailsSpecTestType.groovy:73)
at _GrailsTest_groovy$_run_closure4.doCall(_GrailsTest_groovy:290)
at _GrailsTest_groovy$_run_closure2.doCall(_GrailsTest_groovy:248)
at _GrailsTest_groovy$_run_closure1_closure21.doCall(_GrailsTest_groovy:195)
at _GrailsTest_groovy$_run_closure1.doCall(_GrailsTest_groovy:184)
| Completed 1 spock test, 0 failed in 2872ms
因此，我只想知道的是：
考虑到测试只验证属性sensei：
为什么要调用两个自定义验证器？ 另外，为什么 transient 属性 name 的自定义验证器会被调用两次？Sample Project @ github
==== 编辑：
一件有趣的事：
奇怪的是，每当我在名称的自定义验证器中放置一个rejectValue 时，例如：
name nullable:false, bindable:true, validator: val, obj, errors ->
obj.log.error "[VALIDATING] 'name': $val, $obj FIRED!", new Exception()
errors.rejectValue 'name', 'should.not.be.fired!', [].toArray(), null
自定义验证器只被调用一次。
但是，不应该调用名称的自定义验证器不吗？
【问题讨论】：
【参考方案1】：这个问题与Spock无关，主要与Grails有关。
据我所知，Grails 无法保证何时以及多少次调用 bean 的约束。也许它们被调用一次，也许是 100 次。
Grails 测试并不完全是单元测试（具有正确的术语定义）。它们在 Grails 引擎中运行，所以很多事情都发生在幕后。
另外需要注意的是，您已经使用 @TestFor 注释标记了您的测试，但您没有使用 Grails 创建的测试 Ninja 实例，而是创建了自己的（可能在 Grails 上下文之外创建）
我手头没有安装 grails 2，但我认为正确的单元测试应该使用由 @TestFor 创建的字段，或者为你的 Ninja 类使用 @Mock() 注释。
【讨论】：
以上是关于Grails 2.2.4：瞬态属性：为啥自定义验证器被调用两次？的主要内容，如果未能解决你的问题，请参考以下文章