通过模型添加及验证数据

（1）模型控制器admin/model/Link.php

<?php
 namespace app\admin\model;

use think\Model;

class Link extends Model
{

}

（2）admin/controller/Link.php

<?php
namespace app\admin\controller;
use think\Controller;
use app\admin\model\Link as Links;
class Link extends Controller
{
    public function lst()
    {
    //   $cateres=\think\Db::name('cate')->select();
    //   $this->assign('cateres',$cateres);
        return $this->fetch();
    }

    public function add()
    {
        if(request()->isPost()){
            $links=new links;
            $links->data([
                'title'=>input('title'),
                'url'=>input('url'),
                'desc'=>input('desc'),
            ]);
            $validate = \think\Loader::validate('Link');
            if($validate->check(links)){//这一行验证有点问题
                // $db=\think\Db::name('Link')->insert($data);
                 if($links->save()){
                    return $this->success('添加链接成功!','lst');
                }else{
                    return $this->error('添加链接失败！');
                }
            }else{
                return $this->error($validate->getError());
            }
            return;
        }
        return $this->fetch();
    }

（3）admin/validate/Link.php

<?php

namespace app\admin\validate;

use think\Validate;

class Link extends Validate
{
    protected $rule = [
        'title'  =>  'require|max:25|unique:link',
        'url'  =>  'require',
    ];

protected $message  =   [
    'title.require' => '链接标题不能为空! ', 
    'title.unique' => '链接标题不能重复! ', 
    'title.max' => '链接标题不能大于25位! ', 
    'url.require' => '链接地址不能为空! ', 
];//按照代码次序验证

}
?>

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