ThinkPHP中的模型2
ThinkPHP中的模型二
ThinkPHP中的模型
1、为什么要创建数据对象
案例：使用ThinkPHP完成部门管理
① 设计数据库
② 创建Dept控制器
路径：./Application/Admin/Controller创建控制器
规则：DeptController.class.php
编程程序三步走
③ 复制add.html模板到./Application/Admin/View/Dept文件夹，更改模板路径
④ 更改View/Index/index.html左侧导航
⑤ 获取添加功能的上级部门（使用模型）
路径：./Application/Admin/Model/DeptModel.class.php
编程模型代码三步走：
在控制器中实例化模型，完成载入上级部门功能。
1）实例化模型
2）调用select方法
3）分配变量到模板文件
在模板文件add.html中，显示上级部门列表
⑥ 实现数据的添加功能addOk
在模板页面中，编程Javascript代码，提交表单数据
定义表单提交页面
在控制器中定义addOk方法实现添加操作
要用到的知识点：I方法，主要功能：接收表单数据，安全性更高
2、数据对象的创建方式
⑦ 引入create方法创建数据对象
以上addOk虽然可以正常添加数据到数据库，但是对于表单的接收和处理过于冗余，我们在ThinkPHP中可以使用create方法对其进行简化操作。
3、create方法分析
使用Zend软件追踪create方法，如下图所示：
当数据处理完成后，会将接收的表单数据赋值给当前对象
问题：为什么add方法不添加任何参数也可以添加成功呢？
答：继续分析add方法，代码如下：
如果add方法中没有任何参数，系统会自动读取$this->data这个属性，又由于刚才create方法在处理完成后，会将表单数据存放于$this->data属性中，所以系统会自动将表单数据添加到数据表中。
4、完成部门列表功能
① 在控制器中定义index方法，如下图所示：
② 复制index.html模板到./Application/Admin/View/Dept文件夹下并更改路径
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