Database groovy.lang.MissingMethodException-保存GORM

我是groovy grails的新开发人员，在数据库测试中有一个名为user的表。我通过使用grails成功登录到该数据库，但无法成功注册新用户。我曾使用GORM导入数据库，但出现了一个奇怪的错误，我无法找到任何可能的解决方案来修复此问题

我的域类

package com.example.ulu

import grails.persistence.Entity;

@Entity
class User {

    String userName
    String password
    String fullName


    static constraints = {

    }
}

dependencies {

        runtime 'mysql:mysql-connector-java:5.1.29'

        test "org.grails:grails-datastore-test-support:1.0.2-grails-2.4"
        compile "javax.validation:validation-api:1.1.0.Final"
        compile "org.grails:grails-spring:2.4.5"
        compile "org.codehaus.groovy:groovy-all:2.4.5"
        runtime "org.hibernate:hibernate-validator:5.0.3.Final"

    }

    plugins {

        build ":tomcat:8.0.22"


        compile ":scaffolding:2.1.2"
        compile ':cache:1.1.8'
        compile ":asset-pipeline:2.1.5"
        runtime ":resources:1.2.14"


        runtime ":hibernate4:4.3.8.1"
        runtime ":database-migration:1.4.0"
        runtime ":jquery:1.11.1"
    }

控制器

def registeruser = { 

    User a = new User()
    a.fullName("John")
    a.userName("burak")
    a.password("1") 
    a.save()


}

插件和依赖项

package com.example.ulu

import grails.persistence.Entity;

@Entity
class User {

    String userName
    String password
    String fullName


    static constraints = {

    }
}

dependencies {

        runtime 'mysql:mysql-connector-java:5.1.29'

        test "org.grails:grails-datastore-test-support:1.0.2-grails-2.4"
        compile "javax.validation:validation-api:1.1.0.Final"
        compile "org.grails:grails-spring:2.4.5"
        compile "org.codehaus.groovy:groovy-all:2.4.5"
        runtime "org.hibernate:hibernate-validator:5.0.3.Final"

    }

    plugins {

        build ":tomcat:8.0.22"


        compile ":scaffolding:2.1.2"
        compile ':cache:1.1.8'
        compile ":asset-pipeline:2.1.5"
        runtime ":resources:1.2.14"


        runtime ":hibernate4:4.3.8.1"
        runtime ":database-migration:1.4.0"
        runtime ":jquery:1.11.1"
    }

这是完全错误的。Groovy使用JavaBean表示法，属性赋值必须如下所示：

a.fullName = "John"
a.userName = "burak"
a.password ="1"

或

或

---

好奇哪位向导以这种方式误导了你。你是刚编出来的还是在什么地方找到了在线学习的方法

a[ 'fullName' ] = "John"
a[ 'userName' ] = "burak"
a[ 'password' ] ="1"