资源路由中缺少索引路由 Laravel

Index Route missing in Resource Routes Laravel

使用某些前缀时我无法获取资源的索引路由,

当我的路线是这样的:

Route::resource('subjects', 'SubjectController')->middleware('auth:admin');

我得到了这条路线列表:

| subjects                | subjects.index
| subjects                | subjects.store
| subjects/create         | subjects.create
| subjects/{subject}      | subjects.update
| subjects/{subject}      | subjects.destroy
| subjects/{subject}      | subjects.show
| subjects/{subject}/edit | subjects.edit

但是当我添加这样的前缀时:

Route::prefix('admin')->group(function () {
    Route::resource('subjects', 'SubjectController')->middleware('auth:admin');
});

索引路由消失,路由列表变成这样:

| admin/subjects                | subjects.store
| admin/subjects/create         | subjects.create
| admin/subjects/{subject}      | subjects.update
| admin/subjects/{subject}      | subjects.destroy
| admin/subjects/{subject}      | subjects.show
| admin/subjects/{subject}/edit | subjects.edit

得到解决方案。实际上在我的 web.php 中还有另一条路线 ('subjects')。我需要删除它,因为它们都在碰撞。