Question

我玩弄grails但是在控制器中渲染JSON时我遇到了麻烦，我有这个代码

import grails.converters.*

        class CourseController {
        def index = { redirect(action:list,params:params) }
        // the delete, save and update actions only accept POST requests
            static allowedMethods = [delete:'POST', save:'POST', update:'POST']

            def list = {
                params.max = Math.min( params.max ? params.max.toInteger() : 10,  100)
                //[ courseInstanceList: Course.list( params ) , courseInstanceTotal: Course.count() ]
                def courses = Course.list( params )
                // return a bunch of json data with metadata.
                def json = [        
                     totalCount: courses.size,
                     results: courses
                ]

                render json as JSON


            }
    //other methods.... that i didn't touch
}

但是当我执行“run-app”命令时，我得到了一个错误的错误：

unable to resolve class org.codehaus.groovy.grails.co
mmons.metaclass.ExpandoMetaClass
 @ line 4, column 1.
   import org.codehaus.groovy.grails.commons.metaclass.ExpandoMetaClass

我真的不知道为什么:(

Answer 1

看起来像Grails安装错误 - GRAILS_HOME设置正确吗？

或者是Groovy jar的冲突 - 类路径上有两个版本的Groovy吗？

Grails中的JSON问题

1 个答案: