ThinkPHP中实例Model方法的区别说明
在TP中,我们对数据库操作时多数都是用TP提供的model去先创建一个表的映射实例,然后在对数据进行处理,但是不同的创建方法对数据的处理和信息的返回却有所不同
在TP中,美国空间,我们可以用下面两种方法去创建一个数据表的映射对象(我暂时用到的)
第一种:$Test = D('Test')
第二种:$Test = new Model('Test')
虽然这两种都可以对数据进行select,insert,delete,udpate操作,在数据验证上有很大的不同,
我们来看看效果,先创建一个 TestModel
复制代码 代码如下:
class TestModel extends Model{
protected $_validate = array{
array('title','require','请输入标题',1),
array('content','require','请输入内容',1),
}
}
创建一个TestAction
复制代码 代码如下:
class TestAction extends Action{
public function Dtest(){
$test = D('Test'); //第一种情况
$test = new Model('Test'); //第二种情况
if($test->Create()){
$test->Add();
}else{
$test->getError();
}
}
}
在运行的时候,香港服务器,大家会发现,香港虚拟主机,用第一种方式实例一个模型就会有数据检查功能,如果 title 没有填写的话就会提示 “请输入标题” (这个是tp提供的一个自动验证功能,当然也需要在相应的model中定义好验证条件);如果用第二种就没有了·····

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