TP6多态笔记

梦里梦外; 2022-09-03 14:30 265阅读 0赞

最近研究pearAdmin TP版时看到了获取用户权限时with关联查询的时候,看到了没理解的语句，后面查询了解到是多态用法，下面附上代码

// 用户的所有权限
        public static function permissions($id,$root)
        { 
            // $aaa = self::with(['roles.permissions', 'directPermissions'])->fetchSql(true)->find($id);
            // roles.permissions 多态用法只，roles模型里的permissions方法
            $admin = self::with(['roles.permissions', 'directPermissions'])->findOrEmpty($id)->toArray();
            $permissions = [];
            //超级管理员缓存所有权限
            if ($admin['id'] == 1){ 
                $perms = AdminPermission::order('sort','asc')->select()->toArray();
                foreach ($perms as $p){ 
                    if($p['status'] == 1){ 
                        $permissions[$p['id']] =  $p;
                        $permissions[$p['id']]['href'] = is_url($p['href'])??$root.$p['href'];
                     }
                }
                if(env('APP_DEBUG')==true){ 
                    $permissions[0] = [
                        "id" => -1,
                        "pid" => 0,
                        "title" => "CRUD",
                        "icon" => "layui-icon layui-icon-util",
                        "href" => $root."/crud/index",
                        "type" => 1,
                    ];
                }
            }else{ 
                 //处理角色权限
                 if (isset($admin['roles']) && !empty($admin['roles'])) { 
                    foreach ($admin['roles'] as $r) { 
                        if (isset($r['permissions']) && !empty($r['permissions'])) { 
                            foreach ($r['permissions'] as $p) { 
                                if($p['status'] == 1){ 
                                    $permissions[$p['id']] =  $p;
                                    $permissions[$p['id']]['href'] = is_url($p['href'])??$root.$p['href'];
                                 }
                            }
                        }
                    }
                }
                //处理直接权限
                if (isset($admin['directPermissions']) && !empty($admin['directPermissions'])) { 
                    foreach ($admin['directPermissions'] as $p) { 
                        if($p['status'] == 1){ 
                           $permissions[$p['id']] =  $p;
                           $permissions[$p['id']]['href'] = is_url($p['href'])??$root.$p['href'];
                        }
                    }
                }
                $key = array_column($permissions, 'sort');
                array_multisort($key,SORT_ASC,$permissions);
            }
            //合并权限为用户的最终权限
            return $permissions;
        }

在搜索学习过程中发现了一遍介绍得比较详细得文章《[tp6使用with方法改进笔记！][tp6_with]》，这边就直接搬他的文章了

用户表模型：`User.php`

namespace app\common\model;
    
    class User extends BaseModel
    { 
        /* * 微信信息关联 */
        public function userWeixin()
        { 
            return $this->hasOne(UserWeixin::class,'user_id')->bind([
                'nickname'=>'nickName',
                'openid'=>'wxOpenid',
                'headimg'=>'headImg',
    
            ]);
        }
        //多级关联上级取指定字段
        public function up()
        { 
            return $this->belongsTo(User::class,'upid')->field('id,mobile,upid');
        }
    
    }

有问题写法（中间一级丢失微信关联）：

$user = User::field('id,mobile,upid')
        ->with(['userWeixin','up','up.userWeixin','up.up','up.up.userWeixin'])
        ->where('id','=',function($query) use($uid){ 
            $query->name('user')->where("id = { $uid}")->field('upid');
        })->find()->toArray();

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NjA2NDAw_size_16_color_FFFFFF_t_70]  
改进写法：

$user = User::field('id,mobile,upper')
       ->with(['userWeixin','up'=>['userWeixin','up'=>['userWeixin']]]) 
       ->where('id','=',function($query) use($uid){ //因为传的ID是当前用户，需要的是上级用户ID
           $query->name('user')->where("id = { $uid}")->field('upid');//简写
          # $query->table(config('database.connections.mysql.prefix').'user')->where("id = {$uid}")->field('upid');
       })->find()->toArray() ;
    dd($user);

语法对比：

with(['userWeixin','up','up.userWeixin','up.up','up.up.userWeixin']) 
     with(['userWeixin','up.userWeixin','up.up.userWeixin'])  
    改成下面写法：
     with(['userWeixin','up'=>['userWeixin','up'=>['userWeixin']]]) 
     with(['userWeixin','up'=>['userWeixin','up.userWeixin']])

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NjA2NDAw_size_16_color_FFFFFF_t_70 1]

[tp6_with]: https://www.jianshu.com/p/09173b4946b5
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NjA2NDAw_size_16_color_FFFFFF_t_70]: /images/20220829/1f9977a0f94145c1ba3c25015a0a9911.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NjA2NDAw_size_16_color_FFFFFF_t_70 1]: /images/20220829/2a9a487373e747a8aae643a46be56954.png