无法在 grails 中的空对象上获取属性“显示”

如何解决无法在 grails 中的空对象上获取属性“显示”

我得到：

无法在我的 grails 项目中的空对象上获取属性“显示”

这是我的代码

package com.djamware

class TestController {

    EmployeeService employeeService
 
    def secondaryDataSourceTemplate

    def mainDataSourceTemplate
 
    def testService
    static allowedMethods = [save: "POST",update: "PUT",delete: "DELETE"]

    def index() {
        render  testService.show
    }

     def show() {
 
         Employee employee=new Employee();
         employee.setName("Gaurav chauhan")
         employee.setEmail("[e-mail]")
         employee.setPosition("Java Devloper")
         employee.setSalary(new Double(15000.0))
         String sqlQuery = "SELECT name FROM Employee";
         def counti=new Integer(1);
         try {
            def result = secondaryDataSourceTemplate.queryForList(sqlQuery)
    
            println "result of Query is =====>"+result.name
            println "Size of Result ========> "+result.size();
            counti=result.size();
    
         }
    
         catch (Exception e) {
             e.printstacktrace();
             counti=new Integer(10);
         }
         employeeService.save(employee)
         render  counti;
    }
}

解决方法

尝试将 show 的定义包含到您的静态方法中

static allowedMethods = [show: "GET",save: "POST",update: "PUT",delete: "DELETE"]