Yii 为什么这条路线不匹配

Yii why this route does not match

我想为文章路由创建简单的路由但没有成功。我有第一条路线应该匹配正则表达式,第二条路线应该匹配 slug 路线。第二个效果很好,但第一个不匹配任何东西。这条路线有什么问题?

    'urlManager' => [
        'enablePrettyUrl' => true,
        'showScriptName' => false,
        'rules' => [
            'article/<action: (index|view|delete|create|update)>' => 'article/<action>',
            'article/<slug>' => 'article/view'
        ],
    ],

action:后应该没有space:

'urlManager' => [
    'enablePrettyUrl' => true,
    'showScriptName' => false,
    'rules' => [
        'article/<action:(index|view|delete|create|update)>' => 'article/<action>',
        'article/<slug>' => 'article/view'
    ],
],