Php 对布尔函数调用成员函数getRole（）

登录时出现以下错误：

FatalThrowableError in RoleHierarchy.php line 43: Call to a member function getRole() on boolean

    in RoleHierarchy.php line 43
    at RoleHierarchy->getReachableRoles(array(false)) in RoleHierarchyVoter.php line 39
    at RoleHierarchyVoter->extractRoles(object(UsernamePasswordToken)) in RoleVoter.php line 42
    at RoleVoter->vote(object(UsernamePasswordToken), object(Request), array('IS_AUTHENTICATED_ANONYMOUSLY')) in classes.php line 4857
    at AccessDecisionManager->decideAffirmative(object(UsernamePasswordToken), array('IS_AUTHENTICATED_ANONYMOUSLY'), object(Request)) in classes.php line 4851
    at AccessDecisionManager->decide(object(UsernamePasswordToken), array('IS_AUTHENTICATED_ANONYMOUSLY'), object(Request)) in DebugAccessDecisionManager.php line 48
    at DebugAccessDecisionManager->decide(object(UsernamePasswordToken), array('IS_AUTHENTICATED_ANONYMOUSLY'), object(Request)) in AccessListener.php line 69
    at AccessListener->handle(object(GetResponseEvent)) in classes.php line 5044
    at Firewall->onKernelRequest(object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
    at call_user_func(array(object(Firewall), 'onKernelRequest'), object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher)) in WrappedListener.php line 106
    at WrappedListener->__invoke(object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher))
    at call_user_func(object(WrappedListener), object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher)) in classes.php line 2923
    at EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent)) in classes.php line 2838
    at EventDispatcher->dispatch('kernel.request', object(GetResponseEvent)) in TraceableEventDispatcher.php line 136
    at TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent)) in classes.php line 4273
    at HttpKernel->handleRaw(object(Request), 1) in classes.php line 4243
    at HttpKernel->handle(object(Request), 1, true) in Kernel.php line 168
    at Kernel->handle(object(Request)) in app_dev.php line 28
    at require('/home/owner/Desktop/Workspace/Documentary/web/app_dev.php') in router_dev.php line 40

security.yml

# To get started with security, check out the documentation:
# http://symfony.com/doc/current/security.html
security:
    encoders:
        DW\UserBundle\Entity\User:
            algorithm: bcrypt
            cost: 12

    role_hierarchy:
        ROLE_ADMIN:       ROLE_USER
        ROLE_SUPER_ADMIN: [ROLE_USER, ROLE_ADMIN, ROLE_ALLOWED_TO_SWITCH]

    # http://symfony.com/doc/current/security.html#b-configuring-how-users-are-loaded
    providers:
        main:
            entity:
                class: DW\UserBundle\Entity\User
                property: username
        in_memory:
            memory: ~

    firewalls:
        # disables authentication for assets and the profiler, adapt it according to your needs
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        main:
            pattern:    ^/
            anonymous: ~
            form_login:
                login_path:  login
                check_path:  login_check
                default_target_path: /
                always_use_default_target_path: true
            logout:
                path:   logout
                target: /

    access_control:
        - { path: ^/login, roles: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/register, roles: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/connect/facebook, roles: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/admin, roles: ROLE_ADMIN }
        - { path: ^/, roles: IS_AUTHENTICATED_ANONYMOUSLY }

使用者

更改

    public function getRoles()
    {
        return $this->roles->toArray();
    }

到

<?php

namespace DW\UserBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Symfony\Component\Security\Core\Role\RoleInterface;

    class Role implements RoleInterface
    {
        /**
         * @var string
         */
        private $id;

        /**
         * @var string
         */
        private $name;

        /**
         * @var string
         */
        private $role;

        /**
         * @var ArrayCollection|User[]
         */
        private $users;

        public function __construct()
        {
            $this->users = new ArrayCollection();
        }

        /**
         * @return string
         */
        public function getId()
        {
            return $this->id;
        }

        /**
         * @return string
         */
        public function getName()
        {
            return $this->name;
        }

        /**
         * @param string $name
         */
        public function setName(string $name)
        {
            $this->name = $name;
        }

        /**
         * @return string
         */
        public function getRole()
        {
            return $this->role;
        }

        /**
         * @param string $role
         */
        public function setRole(string $role)
        {
            $this->role = $role;
        }

        /**
         * @return ArrayCollection|User[]
         */
        public function getUsers()
        {
            return $this->users;
        }

        /**
         * @param ArrayCollection|User[] $users
         */
        public function setUsers($users)
        {
            $this->users = $users;
        }
    }

    public function getRoles()
    {
        return $this->roles->toArray();
    }

    public function getRoles()
    {
        $roleNames = [];
        foreach ($this->roles as $role) {
            $roleNames[] = $role->getRole();
        }
        return $roleNames;
    }