cakephp 对数据库操作的封装方法的使用

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假设有表books ，其中分别有字段id,book_name,type_id,type_name,year,status,create_time

1. 添加数据

$this->loadModal('Book');
$data['book_name'] = '雨季不再来';
$data['type_id'] = 4;
$data['type_name'] = '小说';
$data['year'] '2014';
$data['status'] = 1;
$data['create_time'] = date('Y-m-d H:i:s');
$result = $this->Book->save($data);
//pr($result);  --->结果为
Array
(
    [BookMedal] => Array
        (
            [book_name] => 雨季不再来
            [type_id] => 4
            [type_name] => 小说
            [year] => 2014
            [status] => 1
            [create_time] => 2014-03-13 14:31:34
        )

)
//判断是否保存成功
if($result){
    echo 'ok';
}else{
    echo 'wrong';
}

 

 //多条保存

$data[0]['book_name'] = '雨季不再来';
$data[0]['type_id'] = 4;
$data[0]['type_name'] = '小说';
$data[0]['year'] '2014';
$data[0]['status'] = 1;
$data[0]['create_time'] = date('Y-m-d H:i:s');

$data[1]['book_name'] = '数学高考联系';
$data[1]['type_id'] = 3;
$data[1]['type_name'] = '数学';
$data[1]['year'] '2014';
$data[1]['status'] = 1;
$data[1]['create_time'] = date('Y-m-d H:i:s');
$result = $this->Book->saveAll($data);

 2. 删除数据

$this->loadModal('Book');

//单条删除

$result = $this->Book->delete(4);   //删除id为4的数据

//多条删除

$result = $this->Book->deleteAll(array('status'=>0));//删除状态为冻结的数据

 

3. 修改数据

1）单条修改，如修改id为12的状态为冻结

$this->loadModal('Book');
$result = $this->Book->updateAll(array('status' => 0), array('id' => 12));

 

2）多条修改，修改名称带‘语文’的状态为冻结

$result = $this->Book->updateAll(array('status' => 0), array('book_name like' => '%语文%'));
//修改id为1,2,3,4的类别为‘数学’
$result = $this->Book->updateAll(array('type_name' => '数学','type_id'=>3), array('id' => array( 1, 2, 3, 4 )));

4. 查询数据

$this->loadModal('Book');
//查询总数
$result = $this->Book->find('count',
array('conditions'=>array('status'=>1),	 //条件是status=1
'fileds'=>array('book_name','type_name','create_time'), //查询的字段
'order'=>array('id'=>'DESC'),	 //按id倒序排列
'limit'=>"{$start},{$this->perpage}"	 //分页查询
)
);