Groovy&Grails经验

<script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"><!-- </p> .</span> </p> <pre class="displaycode"><textarea cols="50" rows="15" name="code" class="java"> class hotel{ static constraints = { name() crtime(nullable:true) uptime(nullable:true) } string name date crtime date uptime def beforeinsert = { crtime = new date() } def beforeupdate = { uptime = new date() } } </textarea> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <p><br /> <script type="text/javascript"><!--mce:1 // --></script>
最好封掉我的blog，csdn现在s×b×得厉害，居然不能用google的广告。

 

在Domain class中设置beforeInsert 之类的事件时，必须要将对应操作的属性设置成nullable=true。domain class所有属性默认是nullable=false的。总结一下正确的格式应该如下,注意nullable:true
class Hotel{ static constraints = { name() crTime(nullable:<script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"><!-- mce:2 // --></script> def beforeUpdate = { upTime = new Date() } }