简单工厂<?php# 简单工厂abstract class mycoach{public function __construct(){}}class cultivatecpc extends mycoach{public function __construct(){echo "把陈培昌培养为搏击教练"."\n";}}class cultivatecj extends mycoach{public function __…
错误信息:缺少对象,An entity with the same identity already exists in this EntitySet RIA 解决方案: 1、如果你的表是要更新的,需要设置主键; 2、identity字段,如果你的数据中这个字段值有零的就特别要…