ThinkPHP CURD方法之data方法详解_PHP
ThinkPHP
ThinkPHP CURD方法的data方法也是模型类的连贯操作方法之一,用于设置当前要操作的数据对象的值,很多开发人员却并不太习惯用这个方法,今天来讲解下如何用好data方法。
具体用法如下:
1.写操作
通常情况下我们都是通过create方法或者赋值的方式生成数据对象,然后写入数据库,例如:
$Model = D('User'); $Model->create(); // 这里略过具体的自动生成和验证判断 $Model->add();
又或者直接对数据对象赋值,例如:
$Model = M('User'); $Model->name = '流年'; $Model->email = 'thinkphp@qq.com'; $Model->add();
那么data方法则是直接生成要操作的数据对象,例如:
$Model = M('User'); $data['name'] = '流年'; $data['email'] = 'thinkphp@qq.com'; $Model->data($data)->add();
注意:如果我们同时使用create方法和data创建数据对象的话,则后调用的方法有效。
data方法支持数组、对象和字符串,对象方式如下:
$Model = M('User'); $obj = new stdClass; $obj->name = '流年'; $obj->email = 'thinkphp@qq.com'; $Model->data($obj)->add();
字符串方式用法如下:
$Model = M('User'); $data = 'name=流年&email=thinkphp@qq.com'; $Model->data($data)->add();
也可以直接在add方法中传入数据对象来新增数据,例如:
$Model = M('User'); $data['name'] = '流年'; $data['email'] = 'thinkphp@qq.com'; $Model->add($data);
但是这种方式data参数只能使用数组。
当然data方法也可以用于更新数据,例如:
$Model = M('User'); $data['id'] = 8; $data['name'] = '流年'; $data['email'] = 'thinkphp@qq.com'; $Model->data($data)->save();
当然我们也可以直接这样用:
$Model = M('User'); $data['id'] = 8; $data['name'] = '流年'; $data['email'] = 'thinkphp@qq.com'; $Model->save($data);
同样,此时data参数只能传入数组。
在调用save方法更新数据的时候 会自动判断当前的数据对象里面是否有主键值存在,如果有的话会自动作为更新条件。也就是说,下面的用法和上面等效:
$Model = M('User'); $data['name'] = '流年'; $data['email'] = 'thinkphp@qq.com'; $Model->data($data)->where('id=8')->save();
2.读操作
除了写操作外,data方法还可以用于读取当前的数据对象,例如:
$User = M('User'); $map['name'] = '流年'; $User->where($map)->find(); // 读取当前数据对象 $data = $User->data();

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