TP框架对数据库的操作

1.添加数据

1.1添加一条数据

$user           = new User;

$user->name     = 'thinkphp';

$user->email    = 'thinkphp@qq.com';

$user->save();

$user = new User;

$user->save([

    'name'  =>  'thinkphp',

    'email' =>  'thinkphp@qq.com'

]);

1.2过滤非数据表字段的数据

$user = new User;

// 过滤post数组中的非数据表字段数据

$user->allowField(true)->save($_POST);

1.3指定某些字段数据

$user = new User;

// post数组中只有name和email字段会写入

$user->allowField(['name','email'])->save($_POST);

1.4添加多条数据

$user = new User;

$list = [

    ['name'=>'thinkphp','email'=>'thinkphp@qq.com'],

    ['name'=>'onethink','email'=>'onethink@qq.com']

];

$user->saveAll($list);

1.5静态方法

$user = User::create([

    'name'  =>  'thinkphp',

    'email' =>  'thinkphp@qq.com'

]);

echo $user->name;

echo $user->email;

echo $user->id; // 获取自增ID

2.更新数据

2.1查找并更新

$user = User::get(1);

$user->name     = 'thinkphp';

$user->email    = 'thinkphp@qq.com';

$user->save();

2.2直接更新数据

$user = new User;

// save方法第二个参数为更新条件

$user->save([

    'name'  => 'thinkphp',

    'email' => 'thinkphp@qq.com'

],['id' => 1]);

2.3 过滤非数据表字段

$user = new User;

// 过滤post数组中的非数据表字段数据

$user->allowField(true)->save($_POST,['id' => 1]);

2.4指定某些字段

$user = new User();

// post数组中只有name和email字段会写入

$user->allowField(['name','email'])->save($_POST, ['id' => 1]);

2.5批量更新数据

$user = new User;

$list = [

    ['id'=>1, 'name'=>'thinkphp', 'email'=>'thinkphp@qq.com'],

    ['id'=>2, 'name'=>'onethink', 'email'=>'onethink@qq.com']

];

$user->saveAll($list);

2.6静态方法

User::where('id', 1)

    ->update(['name' => 'thinkphp']);

2.7自动识别

2.7.1显示更新数据

// 实例化模型

$user = new User;

// 显式指定更新数据操作

$user->isUpdate(true)

    ->save(['id' => 1, 'name' => 'thinkphp']);

2.7.2显示新增数据

$user = User::get(1);

$user->name = 'thinkphp';

// 显式指定当前操作为新增操作

$user->isUpdate(false)->save();

3.删除数据

3.1删除当前模型

$user = User::get(1);

$user->delete();

3.2根据主键删除

User::destroy(1);

// 支持批量删除多个数据

User::destroy('1,2,3');

// 或者

User::destroy([1,2,3]);

3.3条件删除

User::destroy(function($query){

    $query->where('id','>',10);

});

4.查询数据

4.1获取单个数据

// 取出主键为1的数据

$user = User::get(1);

echo $user->name;

// 使用查询构造器查询满足条件的数据

$user = User::where('name', 'thinkphp')->find();

echo $user->name;

4.2获取多个数据

// 根据主键获取多个数据

$list = User::all('1,2,3');

// 或者使用数组

$list = User::all([1,2,3]);

// 对数据集进行遍历操作

foreach($list as $key=>$user){

    echo $user->name;

}

// 使用查询构造器查询

$list = User::where('status', 1)->limit(3)->order('id', 'asc')->select();

foreach($list as $key=>$user){

    echo $user->name;

}

4.3获取某个字段或者某个列的值

// 获取某个用户的积分

User::where('id',10)->value('score');

// 获取某个列的所有值

User::where('status',1)->column('name');

// 以id为索引

User::where('status',1)->column('name','id');

巴特西

TP框架对数据库的操作

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