小编mik*_*ard的帖子

我正在阅读"Grails入门"电子书,并在第38页(实际第50页)第4章(验证)中遇到了问题.这是代码:

哦,书中的代码可能有拼写错误,但它不会影响我得到的行为或错误消息,如下所示:

def code = badField?.codes.find { 
   it == 'race.startDate.validator.invalid'
}

正如我所说,它不会影响主要的执行,但只是好奇,如果我是对的,或者如果这是Groovy中的东西,我还没有遇到过.我把我认为它应该放在下面.

package racetrack

import groovy.util.GroovyTestCase


class RaceIntegrationTests extends GroovyTestCase { 

    void testRaceDatesBeforeToday() {
    def lastWeek = new Date() - 7 
    def race = new Race(startDate:lastWeek) 
    assertFalse "Validation should not succeed", race.validate() 
    // It should have errors after validation fails 
    assertTrue "There should be errors", race.hasErrors()

    println "\nErrors:" 
    println race.errors ?: "no errors found"

    def badField = race.errors.getFieldError('startDate') 
    println "\nBadField:" 
    println badField ?: "startDate wasn't a bad field" 
    assertNotNull "Expecting …