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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\rbac;
use Yii;
use yii\base\InvalidArgumentException;
use yii\base\InvalidCallException;
use yii\caching\CacheInterface;
use yii\db\Connection;
use yii\db\Expression;
use yii\db\Query;
use yii\di\Instance;
/**
* DbManager represents an authorization manager that stores authorization information in database.
*
* The database connection is specified by [[db]]. The database schema could be initialized by applying migration:
*
* ```
* yii migrate --migrationPath=@yii/rbac/migrations/
* ```
*
* If you don't want to use migration and need SQL instead, files for all databases are in migrations directory.
*
* You may change the names of the tables used to store the authorization and rule data by setting [[itemTable]],
* [[itemChildTable]], [[assignmentTable]] and [[ruleTable]].
*
* For more details and usage information on DbManager, see the [guide article on security authorization](guide:security-authorization).
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Alexander Kochetov <creocoder@gmail.com>
* @since 2.0
*/
class DbManager extends BaseManager
{
/**
* @var Connection|array|string the DB connection object or the application component ID of the DB connection.
* After the DbManager object is created, if you want to change this property, you should only assign it
* with a DB connection object.
* Starting from version 2.0.2, this can also be a configuration array for creating the object.
*/
public $db = 'db';
/**
* @var string the name of the table storing authorization items. Defaults to "auth_item".
*/
public $itemTable = '{{%auth_item}}';
/**
* @var string the name of the table storing authorization item hierarchy. Defaults to "auth_item_child".
*/
public $itemChildTable = '{{%auth_item_child}}';
/**
* @var string the name of the table storing authorization item assignments. Defaults to "auth_assignment".
*/
public $assignmentTable = '{{%auth_assignment}}';
/**
* @var string the name of the table storing rules. Defaults to "auth_rule".
*/
public $ruleTable = '{{%auth_rule}}';
/**
* @var CacheInterface|array|string the cache used to improve RBAC performance. This can be one of the following:
*
* - an application component ID (e.g. `cache`)
* - a configuration array
* - a [[\yii\caching\Cache]] object
*
* When this is not set, it means caching is not enabled.
*
* Note that by enabling RBAC cache, all auth items, rules and auth item parent-child relationships will
* be cached and loaded into memory. This will improve the performance of RBAC permission check. However,
* it does require extra memory and as a result may not be appropriate if your RBAC system contains too many
* auth items. You should seek other RBAC implementations (e.g. RBAC based on Redis storage) in this case.
*
* Also note that if you modify RBAC items, rules or parent-child relationships from outside of this component,
* you have to manually call [[invalidateCache()]] to ensure data consistency.
*
* @since 2.0.3
*/
public $cache;
/**
* @var string the key used to store RBAC data in cache
* @see cache
* @since 2.0.3
*/
public $cacheKey = 'rbac';
/**
* @var Item[] all auth items (name => Item)
*/
protected $items;
/**
* @var Rule[] all auth rules (name => Rule)
*/
protected $rules;
/**
* @var array auth item parent-child relationships (childName => list of parents)
*/
protected $parents;
/**
* Initializes the application component.
* This method overrides the parent implementation by establishing the database connection.
*/
public function init()
{
parent::init();
$this->db = Instance::ensure($this->db, Connection::className());
if ($this->cache !== null) {
$this->cache = Instance::ensure($this->cache, 'yii\caching\CacheInterface');
}
}
private $_checkAccessAssignments = [];
/**
* {@inheritdoc}
*/
public function checkAccess($userId, $permissionName, $params = [])
{
if (isset($this->_checkAccessAssignments[(string) $userId])) {
$assignments = $this->_checkAccessAssignments[(string) $userId];
} else {
$assignments = $this->getAssignments($userId);
$this->_checkAccessAssignments[(string) $userId] = $assignments;
}
if ($this->hasNoAssignments($assignments)) {
return false;
}
$this->loadFromCache();
if ($this->items !== null) {
return $this->checkAccessFromCache($userId, $permissionName, $params, $assignments);
}
return $this->checkAccessRecursive($userId, $permissionName, $params, $assignments);
}
/**
* Performs access check for the specified user based on the data loaded from cache.
* This method is internally called by [[checkAccess()]] when [[cache]] is enabled.
* @param string|int $user the user ID. This should can be either an integer or a string representing
* the unique identifier of a user. See [[\yii\web\User::id]].
* @param string $itemName the name of the operation that need access check
* @param array $params name-value pairs that would be passed to rules associated
* with the tasks and roles assigned to the user. A param with name 'user' is added to this array,
* which holds the value of `$userId`.
* @param Assignment[] $assignments the assignments to the specified user
* @return bool whether the operations can be performed by the user.
* @since 2.0.3
*/
protected function checkAccessFromCache($user, $itemName, $params, $assignments)
{
if (!isset($this->items[$itemName])) {
return false;
}
$item = $this->items[$itemName];
Yii::debug($item instanceof Role ? "Checking role: $itemName" : "Checking permission: $itemName", __METHOD__);
if (!$this->executeRule($user, $item, $params)) {
return false;
}
if (isset($assignments[$itemName]) || in_array($itemName, $this->defaultRoles)) {
return true;
}
if (!empty($this->parents[$itemName])) {
foreach ($this->parents[$itemName] as $parent) {
if ($this->checkAccessFromCache($user, $parent, $params, $assignments)) {
return true;
}
}
}
return false;
}
/**
* Performs access check for the specified user.
* This method is internally called by [[checkAccess()]].
* @param string|int $user the user ID. This should can be either an integer or a string representing
* the unique identifier of a user. See [[\yii\web\User::id]].
* @param string $itemName the name of the operation that need access check
* @param array $params name-value pairs that would be passed to rules associated
* with the tasks and roles assigned to the user. A param with name 'user' is added to this array,
* which holds the value of `$userId`.
* @param Assignment[] $assignments the assignments to the specified user
* @return bool whether the operations can be performed by the user.
*/
protected function checkAccessRecursive($user, $itemName, $params, $assignments)
{
if (($item = $this->getItem($itemName)) === null) {
return false;
}
Yii::debug($item instanceof Role ? "Checking role: $itemName" : "Checking permission: $itemName", __METHOD__);
if (!$this->executeRule($user, $item, $params)) {
return false;
}
if (isset($assignments[$itemName]) || in_array($itemName, $this->defaultRoles)) {
return true;
}
$query = new Query();
$parents = $query->select(['parent'])
->from($this->itemChildTable)
->where(['child' => $itemName])
->column($this->db);
foreach ($parents as $parent) {
if ($this->checkAccessRecursive($user, $parent, $params, $assignments)) {
return true;
}
}
return false;
}
/**
* {@inheritdoc}
*/
protected function getItem($name)
{
if (empty($name)) {
return null;
}
if (!empty($this->items[$name])) {
return $this->items[$name];
}
$row = (new Query())->from($this->itemTable)
->where(['name' => $name])
->one($this->db);
if ($row === false) {
return null;
}
return $this->populateItem($row);
}
/**
* Returns a value indicating whether the database supports cascading update and delete.
* The default implementation will return false for SQLite database and true for all other databases.
* @return bool whether the database supports cascading update and delete.
*/
protected function supportsCascadeUpdate()
{
return strncmp($this->db->getDriverName(), 'sqlite', 6) !== 0;
}
/**
* {@inheritdoc}
*/
protected function addItem($item)
{
$time = time();
if ($item->createdAt === null) {
$item->createdAt = $time;
}
if ($item->updatedAt === null) {
$item->updatedAt = $time;
}
$this->db->createCommand()
->insert($this->itemTable, [
'name' => $item->name,
'type' => $item->type,
'description' => $item->description,
'rule_name' => $item->ruleName,
'data' => $item->data === null ? null : serialize($item->data),
'created_at' => $item->createdAt,
'updated_at' => $item->updatedAt,
])->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function removeItem($item)
{
if (!$this->supportsCascadeUpdate()) {
$this->db->createCommand()
->delete($this->itemChildTable, ['or', '[[parent]]=:name', '[[child]]=:name'], [':name' => $item->name])
->execute();
$this->db->createCommand()
->delete($this->assignmentTable, ['item_name' => $item->name])
->execute();
}
$this->db->createCommand()
->delete($this->itemTable, ['name' => $item->name])
->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function updateItem($name, $item)
{
if ($item->name !== $name && !$this->supportsCascadeUpdate()) {
$this->db->createCommand()
->update($this->itemChildTable, ['parent' => $item->name], ['parent' => $name])
->execute();
$this->db->createCommand()
->update($this->itemChildTable, ['child' => $item->name], ['child' => $name])
->execute();
$this->db->createCommand()
->update($this->assignmentTable, ['item_name' => $item->name], ['item_name' => $name])
->execute();
}
$item->updatedAt = time();
$this->db->createCommand()
->update($this->itemTable, [
'name' => $item->name,
'description' => $item->description,
'rule_name' => $item->ruleName,
'data' => $item->data === null ? null : serialize($item->data),
'updated_at' => $item->updatedAt,
], [
'name' => $name,
])->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function addRule($rule)
{
$time = time();
if ($rule->createdAt === null) {
$rule->createdAt = $time;
}
if ($rule->updatedAt === null) {
$rule->updatedAt = $time;
}
$this->db->createCommand()
->insert($this->ruleTable, [
'name' => $rule->name,
'data' => serialize($rule),
'created_at' => $rule->createdAt,
'updated_at' => $rule->updatedAt,
])->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function updateRule($name, $rule)
{
if ($rule->name !== $name && !$this->supportsCascadeUpdate()) {
$this->db->createCommand()
->update($this->itemTable, ['rule_name' => $rule->name], ['rule_name' => $name])
->execute();
}
$rule->updatedAt = time();
$this->db->createCommand()
->update($this->ruleTable, [
'name' => $rule->name,
'data' => serialize($rule),
'updated_at' => $rule->updatedAt,
], [
'name' => $name,
])->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function removeRule($rule)
{
if (!$this->supportsCascadeUpdate()) {
$this->db->createCommand()
->update($this->itemTable, ['rule_name' => null], ['rule_name' => $rule->name])
->execute();
}
$this->db->createCommand()
->delete($this->ruleTable, ['name' => $rule->name])
->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
protected function getItems($type)
{
$query = (new Query())
->from($this->itemTable)
->where(['type' => $type]);
$items = [];
foreach ($query->all($this->db) as $row) {
$items[$row['name']] = $this->populateItem($row);
}
return $items;
}
/**
* Populates an auth item with the data fetched from database.
* @param array $row the data from the auth item table
* @return Item the populated auth item instance (either Role or Permission)
*/
protected function populateItem($row)
{
$class = $row['type'] == Item::TYPE_PERMISSION ? Permission::className() : Role::className();
if (!isset($row['data']) || ($data = @unserialize(is_resource($row['data']) ? stream_get_contents($row['data']) : $row['data'])) === false) {
$data = null;
}
return new $class([
'name' => $row['name'],
'type' => $row['type'],
'description' => $row['description'],
'ruleName' => $row['rule_name'] ?: null,
'data' => $data,
'createdAt' => $row['created_at'],
'updatedAt' => $row['updated_at'],
]);
}
/**
* {@inheritdoc}
* The roles returned by this method include the roles assigned via [[$defaultRoles]].
*/
public function getRolesByUser($userId)
{
if ($this->isEmptyUserId($userId)) {
return [];
}
$query = (new Query())->select('b.*')
->from(['a' => $this->assignmentTable, 'b' => $this->itemTable])
->where('{{a}}.[[item_name]]={{b}}.[[name]]')
->andWhere(['a.user_id' => (string) $userId])
->andWhere(['b.type' => Item::TYPE_ROLE]);
$roles = $this->getDefaultRoleInstances();
foreach ($query->all($this->db) as $row) {
$roles[$row['name']] = $this->populateItem($row);
}
return $roles;
}
/**
* {@inheritdoc}
*/
public function getChildRoles($roleName)
{
$role = $this->getRole($roleName);
if ($role === null) {
throw new InvalidArgumentException("Role \"$roleName\" not found.");
}
$result = [];
$this->getChildrenRecursive($roleName, $this->getChildrenList(), $result);
$roles = [$roleName => $role];
$roles += array_filter($this->getRoles(), function (Role $roleItem) use ($result) {
return array_key_exists($roleItem->name, $result);
});
return $roles;
}
/**
* {@inheritdoc}
*/
public function getPermissionsByRole($roleName)
{
$childrenList = $this->getChildrenList();
$result = [];
$this->getChildrenRecursive($roleName, $childrenList, $result);
if (empty($result)) {
return [];
}
$query = (new Query())->from($this->itemTable)->where([
'type' => Item::TYPE_PERMISSION,
'name' => array_keys($result),
]);
$permissions = [];
foreach ($query->all($this->db) as $row) {
$permissions[$row['name']] = $this->populateItem($row);
}
return $permissions;
}
/**
* {@inheritdoc}
*/
public function getPermissionsByUser($userId)
{
if ($this->isEmptyUserId($userId)) {
return [];
}
$directPermission = $this->getDirectPermissionsByUser($userId);
$inheritedPermission = $this->getInheritedPermissionsByUser($userId);
return array_merge($directPermission, $inheritedPermission);
}
/**
* Returns all permissions that are directly assigned to user.
* @param string|int $userId the user ID (see [[\yii\web\User::id]])
* @return Permission[] all direct permissions that the user has. The array is indexed by the permission names.
* @since 2.0.7
*/
protected function getDirectPermissionsByUser($userId)
{
$query = (new Query())->select('b.*')
->from(['a' => $this->assignmentTable, 'b' => $this->itemTable])
->where('{{a}}.[[item_name]]={{b}}.[[name]]')
->andWhere(['a.user_id' => (string) $userId])
->andWhere(['b.type' => Item::TYPE_PERMISSION]);
$permissions = [];
foreach ($query->all($this->db) as $row) {
$permissions[$row['name']] = $this->populateItem($row);
}
return $permissions;
}
/**
* Returns all permissions that the user inherits from the roles assigned to him.
* @param string|int $userId the user ID (see [[\yii\web\User::id]])
* @return Permission[] all inherited permissions that the user has. The array is indexed by the permission names.
* @since 2.0.7
*/
protected function getInheritedPermissionsByUser($userId)
{
$query = (new Query())->select('item_name')
->from($this->assignmentTable)
->where(['user_id' => (string) $userId]);
$childrenList = $this->getChildrenList();
$result = [];
foreach ($query->column($this->db) as $roleName) {
$this->getChildrenRecursive($roleName, $childrenList, $result);
}
if (empty($result)) {
return [];
}
$query = (new Query())->from($this->itemTable)->where([
'type' => Item::TYPE_PERMISSION,
'name' => array_keys($result),
]);
$permissions = [];
foreach ($query->all($this->db) as $row) {
$permissions[$row['name']] = $this->populateItem($row);
}
return $permissions;
}
/**
* Returns the children for every parent.
* @return array the children list. Each array key is a parent item name,
* and the corresponding array value is a list of child item names.
*/
protected function getChildrenList()
{
$query = (new Query())->from($this->itemChildTable);
$parents = [];
foreach ($query->all($this->db) as $row) {
$parents[$row['parent']][] = $row['child'];
}
return $parents;
}
/**
* Recursively finds all children and grand children of the specified item.
* @param string $name the name of the item whose children are to be looked for.
* @param array $childrenList the child list built via [[getChildrenList()]]
* @param array $result the children and grand children (in array keys)
*/
protected function getChildrenRecursive($name, $childrenList, &$result)
{
if (isset($childrenList[$name])) {
foreach ($childrenList[$name] as $child) {
$result[$child] = true;
$this->getChildrenRecursive($child, $childrenList, $result);
}
}
}
/**
* {@inheritdoc}
*/
public function getRule($name)
{
if ($this->rules !== null) {
return isset($this->rules[$name]) ? $this->rules[$name] : null;
}
$row = (new Query())->select(['data'])
->from($this->ruleTable)
->where(['name' => $name])
->one($this->db);
if ($row === false) {
return null;
}
$data = $row['data'];
if (is_resource($data)) {
$data = stream_get_contents($data);
}
return unserialize($data);
}
/**
* {@inheritdoc}
*/
public function getRules()
{
if ($this->rules !== null) {
return $this->rules;
}
$query = (new Query())->from($this->ruleTable);
$rules = [];
foreach ($query->all($this->db) as $row) {
$data = $row['data'];
if (is_resource($data)) {
$data = stream_get_contents($data);
}
$rules[$row['name']] = unserialize($data);
}
return $rules;
}
/**
* {@inheritdoc}
*/
public function getAssignment($roleName, $userId)
{
if ($this->isEmptyUserId($userId)) {
return null;
}
$row = (new Query())->from($this->assignmentTable)
->where(['user_id' => (string) $userId, 'item_name' => $roleName])
->one($this->db);
if ($row === false) {
return null;
}
return new Assignment([
'userId' => $row['user_id'],
'roleName' => $row['item_name'],
'createdAt' => $row['created_at'],
]);
}
/**
* {@inheritdoc}
*/
public function getAssignments($userId)
{
if ($this->isEmptyUserId($userId)) {
return [];
}
$query = (new Query())
->from($this->assignmentTable)
->where(['user_id' => (string) $userId]);
$assignments = [];
foreach ($query->all($this->db) as $row) {
$assignments[$row['item_name']] = new Assignment([
'userId' => $row['user_id'],
'roleName' => $row['item_name'],
'createdAt' => $row['created_at'],
]);
}
return $assignments;
}
/**
* {@inheritdoc}
* @since 2.0.8
*/
public function canAddChild($parent, $child)
{
return !$this->detectLoop($parent, $child);
}
/**
* {@inheritdoc}
*/
public function addChild($parent, $child)
{
if ($parent->name === $child->name) {
throw new InvalidArgumentException("Cannot add '{$parent->name}' as a child of itself.");
}
if ($parent instanceof Permission && $child instanceof Role) {
throw new InvalidArgumentException('Cannot add a role as a child of a permission.');
}
if ($this->detectLoop($parent, $child)) {
throw new InvalidCallException("Cannot add '{$child->name}' as a child of '{$parent->name}'. A loop has been detected.");
}
$this->db->createCommand()
->insert($this->itemChildTable, ['parent' => $parent->name, 'child' => $child->name])
->execute();
$this->invalidateCache();
return true;
}
/**
* {@inheritdoc}
*/
public function removeChild($parent, $child)
{
$result = $this->db->createCommand()
->delete($this->itemChildTable, ['parent' => $parent->name, 'child' => $child->name])
->execute() > 0;
$this->invalidateCache();
return $result;
}
/**
* {@inheritdoc}
*/
public function removeChildren($parent)
{
$result = $this->db->createCommand()
->delete($this->itemChildTable, ['parent' => $parent->name])
->execute() > 0;
$this->invalidateCache();
return $result;
}
/**
* {@inheritdoc}
*/
public function hasChild($parent, $child)
{
return (new Query())
->from($this->itemChildTable)
->where(['parent' => $parent->name, 'child' => $child->name])
->one($this->db) !== false;
}
/**
* {@inheritdoc}
*/
public function getChildren($name)
{
$query = (new Query())
->select(['name', 'type', 'description', 'rule_name', 'data', 'created_at', 'updated_at'])
->from([$this->itemTable, $this->itemChildTable])
->where(['parent' => $name, 'name' => new Expression('[[child]]')]);
$children = [];
foreach ($query->all($this->db) as $row) {
$children[$row['name']] = $this->populateItem($row);
}
return $children;
}
/**
* Checks whether there is a loop in the authorization item hierarchy.
* @param Item $parent the parent item
* @param Item $child the child item to be added to the hierarchy
* @return bool whether a loop exists
*/
protected function detectLoop($parent, $child)
{
if ($child->name === $parent->name) {
return true;
}
foreach ($this->getChildren($child->name) as $grandchild) {
if ($this->detectLoop($parent, $grandchild)) {
return true;
}
}
return false;
}
/**
* {@inheritdoc}
*/
public function assign($role, $userId)
{
$assignment = new Assignment([
'userId' => $userId,
'roleName' => $role->name,
'createdAt' => time(),
]);
$this->db->createCommand()
->insert($this->assignmentTable, [
'user_id' => $assignment->userId,
'item_name' => $assignment->roleName,
'created_at' => $assignment->createdAt,
])->execute();
unset($this->_checkAccessAssignments[(string) $userId]);
return $assignment;
}
/**
* {@inheritdoc}
*/
public function revoke($role, $userId)
{
if ($this->isEmptyUserId($userId)) {
return false;
}
unset($this->_checkAccessAssignments[(string) $userId]);
return $this->db->createCommand()
->delete($this->assignmentTable, ['user_id' => (string) $userId, 'item_name' => $role->name])
->execute() > 0;
}
/**
* {@inheritdoc}
*/
public function revokeAll($userId)
{
if ($this->isEmptyUserId($userId)) {
return false;
}
unset($this->_checkAccessAssignments[(string) $userId]);
return $this->db->createCommand()
->delete($this->assignmentTable, ['user_id' => (string) $userId])
->execute() > 0;
}
/**
* {@inheritdoc}
*/
public function removeAll()
{
$this->removeAllAssignments();
$this->db->createCommand()->delete($this->itemChildTable)->execute();
$this->db->createCommand()->delete($this->itemTable)->execute();
$this->db->createCommand()->delete($this->ruleTable)->execute();
$this->invalidateCache();
}
/**
* {@inheritdoc}
*/
public function removeAllPermissions()
{
$this->removeAllItems(Item::TYPE_PERMISSION);
}
/**
* {@inheritdoc}
*/
public function removeAllRoles()
{
$this->removeAllItems(Item::TYPE_ROLE);
}
/**
* Removes all auth items of the specified type.
* @param int $type the auth item type (either Item::TYPE_PERMISSION or Item::TYPE_ROLE)
*/
protected function removeAllItems($type)
{
if (!$this->supportsCascadeUpdate()) {
$names = (new Query())
->select(['name'])
->from($this->itemTable)
->where(['type' => $type])
->column($this->db);
if (empty($names)) {
return;
}
$key = $type == Item::TYPE_PERMISSION ? 'child' : 'parent';
$this->db->createCommand()
->delete($this->itemChildTable, [$key => $names])
->execute();
$this->db->createCommand()
->delete($this->assignmentTable, ['item_name' => $names])
->execute();
}
$this->db->createCommand()
->delete($this->itemTable, ['type' => $type])
->execute();
$this->invalidateCache();
}
/**
* {@inheritdoc}
*/
public function removeAllRules()
{
if (!$this->supportsCascadeUpdate()) {
$this->db->createCommand()
->update($this->itemTable, ['rule_name' => null])
->execute();
}
$this->db->createCommand()->delete($this->ruleTable)->execute();
$this->invalidateCache();
}
/**
* {@inheritdoc}
*/
public function removeAllAssignments()
{
$this->_checkAccessAssignments = [];
$this->db->createCommand()->delete($this->assignmentTable)->execute();
}
public function invalidateCache()
{
if ($this->cache !== null) {
$this->cache->delete($this->cacheKey);
$this->items = null;
$this->rules = null;
$this->parents = null;
}
$this->_checkAccessAssignments = [];
}
public function loadFromCache()
{
if ($this->items !== null || !$this->cache instanceof CacheInterface) {
return;
}
$data = $this->cache->get($this->cacheKey);
if (is_array($data) && isset($data[0], $data[1], $data[2])) {
list($this->items, $this->rules, $this->parents) = $data;
return;
}
$query = (new Query())->from($this->itemTable);
$this->items = [];
foreach ($query->all($this->db) as $row) {
$this->items[$row['name']] = $this->populateItem($row);
}
$query = (new Query())->from($this->ruleTable);
$this->rules = [];
foreach ($query->all($this->db) as $row) {
$data = $row['data'];
if (is_resource($data)) {
$data = stream_get_contents($data);
}
$this->rules[$row['name']] = unserialize($data);
}
$query = (new Query())->from($this->itemChildTable);
$this->parents = [];
foreach ($query->all($this->db) as $row) {
if (isset($this->items[$row['child']])) {
$this->parents[$row['child']][] = $row['parent'];
}
}
$this->cache->set($this->cacheKey, [$this->items, $this->rules, $this->parents]);
}
/**
* Returns all role assignment information for the specified role.
* @param string $roleName
* @return string[] the ids. An empty array will be
* returned if role is not assigned to any user.
* @since 2.0.7
*/
public function getUserIdsByRole($roleName)
{
if (empty($roleName)) {
return [];
}
return (new Query())->select('[[user_id]]')
->from($this->assignmentTable)
->where(['item_name' => $roleName])->column($this->db);
}
/**
* Check whether $userId is empty.
* @param mixed $userId
* @return bool
*/
private function isEmptyUserId($userId)
{
return !isset($userId) || $userId === '';
}
}
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