Laravel 5.2 ACL权限系统判定权限问题

首先，权限系统参考
http://9iphp.com/web/laravel/laravel-5-acl-define.html
该文章编写的。

Model：

CommonUser.php

<?php

namespace App\Models;

use Illuminate\Foundation\Auth\User as Authenticatable;

class CommonUser extends Authenticatable
{
    public function groups()
    {
        return $this->belongsToMany(CommonGroup::class, 'common_group_user', 'user_id', 'group_id');
    }

    // 判断用户是否属于某个用户组
    public function hasGroup($group)
    {
        if (is_string($group)) {
            return $this->groups->contains('name', $group);
        }

        return !! $group->intersect($this->groups)->count();
    }

    // 判断用户是否具有某权限
    public function hasPermission($permission)
    {
        return $this->hasGroup($permission->groups);
    }

    // 给用户分配角色
    public function assignGroup($group)
    {
        return $this->groups()->save(
            CommonGroup::whereName($group)->firstOrFail()
        );
    }
}

CommonGroup.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class CommonGroup extends Model
{
    protected $table = 'common_groups';

    protected $fillable = [
        'name', 'label', 'description',
    ];

    public function permissions()
    {
        return $this->belongsToMany(CommonPermission::class, 'common_permission_group', 'group_id', 'permission_id');
    }

    //给用户组添加权限
    public function givePermissionTo($permission)
    {
        return $this->permissions()->save($permission);
    }
}

CommonPermission.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class CommonPermission extends Model
{
    protected $table = 'common_permissions';

    protected $fillable = [
        'name', 'label', 'description',
    ];

    public function groups()
    {
        return $this->belongsToMany(CommonGroup::class, 'common_permission_group', 'permission_id', 'group_id');
    }
}

App\Providers\AuthServiceProvider.php

public function boot(GateContract $gate)
    {
        // $this->registerPolicies($gate);

        parent::registerPolicies($gate);

        $permissions = \App\Models\CommonPermission::with('groups')->get();
        foreach ($permissions as $permission) {
            $gate->define($permission->name, function($user) use ($permission) {
                return $user->hasPermission($permission);
            });
        }
    }

Database

1. common_users
id: 1
username: Bantes

2. common_groups
id: 1
name: admin

3. common_permissions
id: 1
name: show-system-setting

4. common_group_user
user_id: 1
group_id: 1

5. common_permission_group
group_id: 1

`

Blade

1. layout.blade.php | @include(menu.blade.php)

2. index.blade.php | @extends(layout.blade.php)