yii2 RBAC uses DbManager to implement background permission judgment

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
  }
}

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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
  }
}

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In addition, add an attribute to the AuthItem model

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

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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 );
  }
}

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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 );

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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 );

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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
}

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/*
 * 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 );

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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

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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'] ) &#63; $_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..);
  }
}

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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 ) )

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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 ) )

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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.

yii2 RBAC uses DbManager to implement background permission judgment_php example