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从grails 1.3.7升级到2.0.1后我在控制器中验证命令对象时遇到了奇怪的异常。grails升级2.0.1命令对象验证错误
groovy.lang.GroovyRuntimeException: Ambiguous method overloading for method org.codehaus.groovy.grails.orm.hibernate.HibernateGormValidationApi#validate.
Cannot resolve which method to invoke for [class at.pdts.etsweb.commandobject.UserCommand, null] due to overlapping prototypes between:
[class java.lang.Object, interface java.util.List]
[class java.lang.Object, interface java.util.Map]
at org.grails.datastore.gorm.InstanceMethodInvokingClosure.call(GormEnhancer.groovy:251)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
我UserCommand命令对象看起来像这样:
package at.pdts.etsweb.commandobject
import at.pdts.etsweb.Common
import grails.validation.Validateable
@Validateable
class UserCommand {
String username
String password
String firstname
String lastname
static constraints = {
username blank: false, email: true
password blank: false, minSize: 8, maxSize: 64, validator: Common.passwordValidator
firstname blank: false
lastname blank: false
}
}
控制器绑定数据如下:
def save { UserCommand command ->
...
}
此时我发现了上述错误消息。我也尝试使用命令对象作为参数保存(UserCommand命令),但没有效果。有没有人有一些提示?