所以我基本上想做的是将我的长代码重构为更简单的代码。我在这个 website 找到了这段代码而且我真的不明白代码里面发生了什么。考虑到我使用的是与标准不同的策略和方法，我认为这段代码不会起作用。

来自网站的代码片段:

//PermissionsServiceProvider.php 
public function boot()
 {
     Permission::get()->map(function($permission){
        Gate::define($permission->slug, function($user) use ($permission){
           return $user->hasPermissionTo($permission);
        });
     });
 }

谁能解释一下这段代码到底发生了什么？

我的代码:

// Posts Policy
Gate::define('post.view', 'App\Policies\Blog\PostsPolicy@view');
Gate::define('post.create', 'App\Policies\Blog\PostsPolicy@create');
Gate::define('post.update', 'App\Policies\Blog\PostsPolicy@update');
Gate::define('post.delete', 'App\Policies\Blog\PostsPolicy@delete');
Gate::define('post.publish', 'App\Policies\Blog\PostsPolicy@publish');
Gate::define('post.edit', 'App\Policies\Blog\PostsPolicy@edit');
Gate::define('post.global', 'App\Policies\Blog\PostsPolicy@global');

// Categories Policy
Gate::define('category.view', 'App\Policies\Blog\CategoriesPolicy@view');
Gate::define('category.create', 'App\Policies\Blog\CategoriesPolicy@create');
Gate::define('category.update', 'App\Policies\Blog\CategoriesPolicy@update');
Gate::define('category.delete', 'App\Policies\Blog\CategoriesPolicy@delete');
Gate::define('category.edit', 'App\Policies\Blog\CategoriesPolicy@edit');
Gate::define('category.global', 'App\Policies\Blog\CategoriesPolicy@global');

// Tags Policy
Gate::define('tag.view', 'App\Policies\Blog\TagsPolicy@view');
Gate::define('tag.create', 'App\Policies\Blog\TagsPolicy@create');
Gate::define('tag.update', 'App\Policies\Blog\TagsPolicy@update');
Gate::define('tag.delete', 'App\Policies\Blog\TagsPolicy@delete');
Gate::define('tag.edit', 'App\Policies\Blog\TagsPolicy@edit');
Gate::define('tag.global', 'App\Policies\Blog\TagsPolicy@global');

// Parts Section Policy
Gate::define('part.section.view', 'App\Policies\Parts\PartSectionsPolicy@view');
Gate::define('part.section.create', 'App\Policies\Parts\PartSectionsPolicy@create');
Gate::define('part.section.update', 'App\Policies\Parts\PartSectionsPolicy@update');
Gate::define('part.section.delete', 'App\Policies\Parts\PartSectionsPolicy@delete');
Gate::define('part.section.edit', 'App\Policies\Parts\PartSectionsPolicy@edit');
Gate::define('part.section.global', 'App\Policies\Parts\PartSectionsPolicy@global');

// Parts Policy
Gate::define('part.view', 'App\Policies\Parts\PartsPolicy@view');
Gate::define('part.create', 'App\Policies\Parts\PartsPolicy@create');
Gate::define('part.update', 'App\Policies\Parts\PartsPolicy@update');
Gate::define('part.delete', 'App\Policies\Parts\PartsPolicy@delete');
Gate::define('part.edit', 'App\Policies\Parts\PartsPolicy@edit');
Gate::define('part.global', 'App\Policies\Parts\PartsPolicy@global');

// Admin Management Policy
Gate::define('admin.global', 'App\Policies\AdminManagementPolicy@global');

// User Management Policy
Gate::define('user.global', 'App\Policies\UserManagementPolicy@global');

有没有办法通过我的权限表中的 foreach 循环来执行此操作？这是一些伪代码:

foreach($permissions as $permission) {
    Gate::define($permission->slug, 'App\Policies\' . $permission->category . 'Policy@' . $permission->name);
}

问题有什么方法可以使我的代码更紧凑，更易于阅读，就像网站上的代码片段一样？

最佳答案

首先，那篇文章的作者根本没有使用策略，他创建了一个权限表，然后通过代码片段将他创建的权限绑定(bind)到laravel gates

 Permission::get()->map(function($permission){
    Gate::define($permission->slug, function($user) use ($permission){
       return $user->hasPermissionTo($permission);
    });
 });

让我们逐行分解

Permission::get() // Query all permissions defined in permissions database table
->map(function($permission){ // Foreach permission do the following
   Gate::define($permission->slug, // Create new gate with the permission slug
   function($user) use ($permission){
      return $user->hasPermissionTo($permission); // the user table has many to many relation with permissions table, here we only check if $user is associated with $permission
   });
});

为了使您的代码更具动态性，我建议您执行以下操作:

数据库结构

1. 创建权限数据库表

2. 创建角色数据库表

3. 创建permission_role 数据透视表

4. 创建role_user 数据透视表

定义关系

1. 角色有很多权限(多对多关系，用belongsToMany定义)

2. 权限属于多个角色(多对多关系，用belongsToMany定义)

3. 用户有很多角色(多对多关系，用belongsToMany定义)

减少全局权限的数量

通过使用Gate::before，您可以允许具有global 或root 权限的特定用户授权所有定义的能力:

Gate::before(function ($user, $ability) {
    if ($user->hasPermission('root-access')) {
        return true;
    }
});

如果您实现数据库权限，您不再需要为每个模型创建策略，并且将使用上述代码动态定义门。

关于php - Laravel - 将用户权限 "Gate::Define"代码重构为更易于阅读的代码，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52231177/