validation - 命令类中缺少validate()方法

Question

我很难找出这个简单的代码出了什么问题:

这是我用来更改密码的命令:

package myapp.commands

import org.springframework.web.context.request.RequestContextHolder as RCH
import myapp.User

class PasswordCommand {
String currentPassword
String password
String passwordConfirm
private u

User getUser() {
    def id = RCH.requestAttributes.session?.user?.id
    if (!u && id) {
        u = User.get(id)
    }
    return u
}

static constraints = {
    currentPassword blank: false, validator: { val, cmd ->
        if (cmd.user && cmd.user.password != val)
            return "user.password.invalid"
    }
...
}

在适当的 Controller 中，我使用以下操作:

 def doPassword = { PasswordCommand cmd ->
    if (!cmd.hasErrors()) {
        User user = cmd.getUser()
           ...

不幸的是，当我尝试更改密码时，出现错误500:

URI: /Myapp/user/doPassword
Class: java.lang.NoSuchMethodError
Message: PasswordCommand.validate()Z

到底是怎么回事 ？!

Answer 1

添加@Validateable批注:

import grails.validation.Validateable
...

@Validateable
class PasswordCommand {
...
}