Groovy&Grails-代碼剪輯-domain對象保存

默認domain對象中，沒有在constraints中聲明的屬性都是必填項。

如User對象

<!-- lang: groovy -->
package com.example

class User {
    String username
    String firstname
    String lastname

    static constraints {
    }
}

測試代碼

<!-- lang: groovy -->
@TestFor(User)
class UserTests {

    void testSave() {
        def user = new User(username:'test',firstname:'zhang')	
        assertNotNull user.save()
    }
}

會出現用例測試錯誤，將全部字段都填值後，測試代碼運行正常

<!-- lang: groovy -->
def user = new User(username:'test',firstname:'zhang',lastname:'san')

在constraints中聲明lastname容許爲空

<!-- lang:groovy -->
static constraints = {
    loginName(nullable:false)
    firstName(nullable:false)
    lastName(nullable:true)
}

再測試不填寫lastname屬性值代碼，測試正常

<!-- lang:groovy -->
def user = new User(username:'test',firstname:'zhang')
assertNotNull user.save()