Yii Framework 2.0 基于角色的访问控制 RBAC

Question

学习 Yii Framework 2.0 我尝试使用 Yii 2.0 文档中的角色库访问控制。但是指南文档对我来说太短了，我无法完成这个学习。我已将以下代码添加到我的配置文件中。

'components' => [
    'authManager' => [
        'class' => 'yii\rbac\DbManager',
    ],
],

我已经使用以下 sql 脚本创建了数据库表。

drop table [auth_assignment];
drop table [auth_item_child];
drop table [auth_item];
drop table [auth_rule];

create table [auth_rule]
(
    [name]  varchar(64) not null,
    [data]  text,
    [created_at]           integer,
    [updated_at]           integer,
    primary key ([name])
);

create table [auth_item]
(
   [name]                 varchar(64) not null,
   [type]                 integer not null,
   [description]          text,
   [rule_name]            varchar(64),
   [data]                 text,
   [created_at]           integer,
   [updated_at]           integer,
   primary key ([name]),
   foreign key ([rule_name]) references [auth_rule] ([name]) on delete set null on update    cascade
);

create index [idx-auth_item-type] on [auth_item] ([type]);

create table [auth_item_child]
(
   [parent]               varchar(64) not null,
   [child]                varchar(64) not null,
   primary key ([parent],[child]),
   foreign key ([parent]) references [auth_item] ([name]) on delete cascade on update cascade,
   foreign key ([child]) references [auth_item] ([name]) on delete cascade on update cascade
);

create table [auth_assignment]
(
   [item_name]            varchar(64) not null,
   [user_id]              varchar(64) not null,
   [created_at]           integer,
   primary key ([item_name], [user_id]),
   foreign key ([item_name]) references [auth_item] ([name]) on delete cascade on update cascade
);

我已经使用以下内容构建了身份验证数据。

class RbacController extends Controller
{
    public function actionInit()
    {
        $auth = Yii::$app->authManager;

        // add "createPost" permission
        $createPost = $auth->createPermission('createPost');
        $createPost->description = 'Create a post';
        $auth->add($createPost);

        // add "updatePost" permission
        $updatePost = $auth->createPermission('updatePost');
        $updatePost->description = 'Update post';
        $auth->add($updatePost);

        // add "author" role and give this role the "createPost" permission
        $author = $auth->createRole('author');
        $auth->add($author);
        $auth->addChild($author, $createPost);

        // add "admin" role and give this role the "updatePost" permission
        // as well as the permissions of the "author" role
        $admin = $auth->createRole('admin');
        $auth->add($admin);
        $auth->addChild($admin, $updatePost);
        $auth->addChild($admin, $author);

        // Assign roles to users. 1 and 2 are IDs returned by IdentityInterface::getId()
        // usually implemented in your User model.
        $auth->assign($author, 2);
        $auth->assign($admin, 1);
    }
}

当通过这个控制器访问这个actionInit()方法时，上面的数据库表已经根据上面的代码填充了数据。此外，在我的用户表中，我有两个用户，管理员用户的 ID 号为 1，作者用户的 ID 号为 2。我使用以下代码创建用户。

public function create()
{
    if ($this->validate()) {
        $user = new User();
        $user->username = $this->username;
        $user->email = $this->email;
        $user->setPassword($this->password);
        $user->generateAuthKey();
        $user->save(false);

        // the following three lines were added:
        $auth = Yii::$app->authManager;
        $authorRole = $auth->getRole('author');
        $auth->assign($authorRole, $user->getId());

        return $user;
    }

    return null;
}

使用上面的代码，所有新插入的用户都将成为作者。使用下面的 if 语句，我可以授予或拒绝访问权限。

if (\Yii::$app->user->can('createPost')) {
    // create post
}

if (\Yii::$app->user->can('updatePost')) {
    // update post
}

到目前为止一切顺利。一切正常。上述代码的场景是普通作者可以创建帖子，但不能更新帖子。管理员可以更新帖子并可以做作者可以做的一切。现在我希望普通作者能够更新他/她自己的帖子。我不知道如何从这里走得更远。我遵循了 Yii 指南文档/安全/授权段落基于角色的访问控制 (RBAC)。我从未使用过 Yii 1。这就是为什么我无法用如此简短的 Yii 2.0 文档 RBAC 解释来弄清楚。

Answer 1

if (\Yii::$app->user->can('updatePost', ['post' => $post])) {
    // update post }

在我的脚本中，我将$post 更改为$model

if (\Yii::$app->user->can('updatePost', ['post' => $model])) {
    // update post }

然后就可以了。

Answer 2

您需要访问规则，并且文档很清楚，所以创建它就像

namespace app\rbac;

use yii\rbac\Rule;

/**
 * Checks if authorID matches user passed via params
 */
class AuthorRule extends Rule
{
    public $name = 'isAuthor';

    /**
     * @param string|integer $user the user ID.
     * @param Item $item the role or permission that this rule is associated with
     * @param array $params parameters passed to ManagerInterface::checkAccess().
     * @return boolean a value indicating whether the rule permits the role or permission it is associated with.
     */
    public function execute($user, $item, $params)
    {
        return isset($params['post']) ? $params['post']->createdBy == $user : false;
    }
}

然后，将其添加到您的 RBAC 角色中

$auth = Yii::$app->authManager;

// add the rule
$rule = new \app\rbac\AuthorRule;
$auth->add($rule);

// add the "updateOwnPost" permission and associate the rule with it.
$updateOwnPost = $auth->createPermission('updateOwnPost');
$updateOwnPost->description = 'Update own post';
$updateOwnPost->ruleName = $rule->name;
$auth->add($updateOwnPost);

// "updateOwnPost" will be used from "updatePost"
$auth->addChild($updateOwnPost, $updatePost);

// allow "author" to update their own posts
$auth->addChild($author, $updateOwnPost);

最后在注册时为用户分配角色

$auth = Yii::$app->authManager;
$authorRole = $auth->getRole('author');
$auth->assign($authorRole, $userid_here);

检查用户是否有能力编辑下面的使用代码，其中 $post 是帖子的模型

if (\Yii::$app->user->can('updatePost', ['post' => $post])) {
    // update post
}

所有这些都来自指南。 如果您有任何问题，请告诉我