yii2 RBAC uses DbManager to implement background permission judgment_php example

The example in this article describes how yii2 RBAC uses DbManager to implement background permission judgment. Share it with everyone for your reference, the details are as follows:

First generate the table in the yii2 framework based on the document

yii migrate --migrationPath=@yii/rbac/migrations/

Generate the following 4 tables:

auth_assignment
auth_item_child
auth_item
auth_rule

Use yii's gii to quickly generate the corresponding model, but since the auth_item table stores roles and permissions at the same time, since we need to divide roles and permissions later to perform curd operations, I created two new models here, RoleForm and PermissionForm, to distinguish the roles. with permissions. Since roles are closely connected with permissions, an additional attribute $child is added to the model generated by auth_item, which will be used later and is ignored for now.

The following is the relevant code of the character model

<&#63;php
namespace app\models;
use Yii;
use app\models\AuthItem;
use yii\rbac\Item;
/*
 * 角色model
 * 指尖上的艺术家
 */
class RoleForm extends AuthItem
{
  public function init() {
    parent::init();
    $this->type = Item::TYPE_ROLE;//yii-rbac-Role隐藏继承常量这里的值是1
  }
}

The following is the relevant code of the permission model

<&#63;php
namespace app\models;
use Yii;
use app\models\AuthItem;
use yii\rbac\Item;
/*
 * 权限model
 * 指尖上的艺术家
 */
class PermissionForm extends AuthItem
{
  public function init() {
    parent::init();
    $this->type = Item::TYPE_PERMISSION;//常量值 2
  }
}

In addition, add an attribute to the AuthItem model

<&#63;php
class AuthItem.....
public $child;//用于角色权限添加
......

Now comes our corresponding controller

First of all, let’s talk about the permission controller. When writing a controller, we need to use the extensions that come with the system
. . .
use yiirbacPermission;
. . .

/*
 * 权限添加
 */
public function actionCreate() {
  $model = new PermissionForm();
  if( $model->load( Yii::$app->request->post() ) && $model->validate() ) {
    //rbac中permission对象
    $permission = new Permission();
    $permission->name = trim( $model->name );
    $permission->type = $model->type;
    //权限添加
    Yii::$app->authManager->add( $permission );
  }
}

When modifying, everything else remains the same, just change the method

/*
 * param string $name 修改的权限名
 * param Object $permission 跟添加一样提交上来的数据
 */
Yii::$app->authManager->update( $name, $permission );

Here is delete

//Returns the named permission.
$permission = Yii::$app->authManager->getPermission( $name );
//Removes a permission or rule from the RBAC system.
Yii::$app->authManager->remove( $permission );

The cud of permissions is all done, so I won’t write it after checking it

The following is the character controller

Bring this

use yii\rbac\Role;
/*
 * 角色添加
 */
public function actionCreate() {
  $model = new RoleForm();
  if ( $model->load( Yii::$app->request->post() ) && $model->validate() ) {
      //实例化角色对象
      $role = new Role();
      $role->name = $model->name;
      $role->type = $model->type;
      //添加角色
      Yii::$app->authManager->add( $role );
  }
  //权限列表( 添加角色的时候我们就可看到当前有没有权限来添加 )
  $permissions = $this->loadPermission();
  //将$model跟$permissions....渲染到视图就好了
}

/*
 * 修改
 * param string $name 修改的角色名
 * param Object $role 跟添加一样提交上来的数据
 */
$bool = Yii::$app->authManager->update( $name, $role );

It’s more troublesome when deleting it

/*
 * param string $name 角色名
 */
$role = Yii::$app->authManager->getRole( $name );//获取当前角色对象
//Returns the child roles.
$childAll = Yii::$app->authManager->getChildren( $role );
if ( isset($childAll) ) {//逐一删除权限
  foreach ($childAll as $value) {
    //Returns the named permission.
    $perObj = Yii::$app->authManager->getPermission($value);
    //Removes a child from its parent.
    Yii::$app->authManager->removeChild( $role, $perObj );
  }
}
Yii::$app->authManager->remove( $role );//最后删除我们的角色了

The most important thing is that we need to give permissions to the role, right? The code is as follows

//当前角色所拥有的权限
$childArray = $this->loadRolePermission( $model->name );//这个就是返回权限数组
if ( !empty( $childArray ) ) {
  $model->child = $childArray;
}
else {
  $model->child = array();
}
//Returns all permissions in the system.
$permissions = Yii::$app->authManager->getPermissions();
$perArr = array();
foreach ($permissions as $key => $value) {
  $perArr[$value->name] = $value->name;
}
if ( $model->load( Yii::$app->request->post() ) && $model->validate() ) {
  //角色对象
  $child = isset( $_POST['AuthItem']['child'] ) ? $_POST['AuthItem']['child'] : NULL;
  //表单无法验证child所以当为空的时候跳回原页面
  if ( empty( $child ) ) {
    return $this->redirect(..你们要跳的页面..);
  }
  //判断角色是否分配权限，已分配则删除，反之增加新的
  if ( !empty( $childArray ) ) {
    //Removed all children form their parent.
    $bool = Yii::$app->authManager->removeChildren( $model );
    if ( !$bool ) {
      throw new HttpException(404, '别想糊弄我！凑你一脸～～～');
    }
  }
  //当前角色对象
  $role = Yii::$app->authManager->getRole( $model->name );
  //child权限添加
  if( isset( $child ) ) {
    foreach ( $child as $val) {
      //获取权限
      $childObj = Yii::$app->authManager->getPermission($val);
      //给item_child表写入数据（权限表）
      Yii::$app->authManager->addChild( $role, $childObj );
    }
    return $this->redirect(..你们要跳的页面..);
  }
}

Finally, our last controller is the role associated with the user

/*
 * 创建角色跟用户之间关联的关键部分代码
 */
//Returns the named role.
$role =Yii::$app->authManager->getRole( $roleName );
// Assigns a role to a user.
Yii::$app->authManager->assign( $role, $userId );<pre name="code" class="php">/*
 * 权限检测
 * param int| string $userId 用户id
 * param string $permission 权限名
 */
Yii::$app->authManager->checkAccess( $userId , $permission ) )

The following is to determine the permissions

/*
 * 权限检测
 * param int| string $userId 用户id
 * param string $permission 权限名
 */
Yii::$app->authManager->checkAccess( $userId , $permission ) )

Readers who are interested in more Yii-related content can check out the special topics of this site: "Introduction to Yii Framework and Summary of Common Techniques", "Summary of Excellent Development Framework of PHP", "Basic Tutorial for Getting Started with Smarty Templates", "Introduction to PHP Object-Oriented Programming" Tutorial", "php string (string) usage summary", "php+mysql database operation introductory tutorial" and "php common database operation skills summary"

I hope this article will help you design PHP programs based on the Yii framework.