tp5更新方法

// 过滤非数据表字段更新
    public function update(Request $request){
        $user = model('User');
        $result = $user -> allowField(true)->save($request->param(),['id'=>1]);
        dump($result);    // 受影响的行数
    }

//更新指定字段
    public function update(Request $request){
        $user = model('User');
        $result = $user -> allowField(['name','email'])->save($request->param(),['id'=>9]);
        dump($result);
    }

数据库类更新数据（推荐）

 public function update(Request $request){
        $user = model('User');
        $user->where('id',1)
            ->update(['name'=>'chrdai']);
    }

闭包更新数据（更新条件为多个时，推荐）

public function update(Request $request){
        $user = model('User');
        $user->save(['name'=>'chrdai'],function($query){
            $query->where('status',1)->where('id','>',18);
        });
    }

静态方法更新数据

    public function update(Request $request){
        $user = model('User');
        $user::where('id',1)
            ->update(['name'=>'chrdai','email'=>'[email protected]']);
    }

批量更新数据saveAll()

$user =model('User');
$list = [
    ['id'=>1, 'name'=>'thinkphp', 'email'=>'[email protected]'],
    ['id'=>2, 'name'=>'onethink', 'email'=>'[email protected]']
];
$user->saveAll($list);