easyUI Treegrid 页面问题?



idField : 'unNo' 这一句有错误，改为idField : 'unitName'则没事

unNo可以得到值，并没有问题，请问这个是什么原因不可以用idField : 'unNo' ?

unNo在数据库中是char(8)主键，在映射文件中是String。


点击收回时报错：



改为idField : 'unitName'则没事，并可以收回。
------解决方案--------------------
你把你数据 看下有没有问题 。看个 tree 数据你看看

[{

	"id":1,

	"name":"C",

	"size":"",

	"date":"02/19/2010",

	"children":[{

		"id":2,

		"name":"Program Files",

		"size":"120 MB",

		"date":"03/20/2010",

		"children":[{

			"id":21,

			"name":"Java",

			"size":"",

			"date":"01/13/2010",

			"state":"closed",

			"children":[{

				"id":211,

				"name":"java.exe",

				"size":"142 KB",

				"date":"01/13/2010"

			},{

				"id":212,

				"name":"jawt.dll",

				"size":"5 KB",

				"date":"01/13/2010"

			}]

		},{

			"id":22,

			"name":"MySQL",

			"size":"",

			"date":"01/13/2010",

			"state":"closed",

			"children":[{

				"id":221,

				"name":"my.ini",

				"size":"10 KB",

				"date":"02/26/2009"

			},{

				"id":222,

				"name":"my-huge.ini",

				"size":"5 KB",

				"date":"02/26/2009"

			},{

				"id":223,

				"name":"my-large.ini",

				"size":"5 KB",

				"date":"02/26/2009"

			}]

		}]

	},{

		"id":3,

		"name":"eclipse",

		"size":"",

		"date":"01/20/2010",

		"children":[{

			"id":31,

			"name":"eclipse.exe",

			"size":"56 KB",

			"date":"05/19/2009"

		},{

			"id":32,

			"name":"eclipse.ini",

			"size":"1 KB",

			"date":"04/20/2010"

		},{