Laravel 多态多对多不分离？

Question

我有一个多态的多对多 User/Location - Group 关系，但我有时间让基本单元测试通过。

/** @test */
public function it_can_have_groups()
{
    $user = factory(User::class)->create();
    $group = factory(Group::class)->create();

    $user->addToGroup($group);
    $this->assertCount(1, $user->groups);  // true

    $user->removeFromGroup($group);
    $this->assertCount(0, $user->groups);  // false
}

这些方法只需根据 documentation:

调用 attach 和 detach

To remove a many-to-many relationship record, use the detach method. The detach method will delete the appropriate record out of the intermediate table; however, both models will remain in the database

public function addToGroup(Group $group)
{
    $this->groups()->attach($group->id);
}

public function removeFromGroup(Group $group)
{
    $this->groups()->detach($group->id));
    dump($group->users());                 // []
}

所以它似乎有效（？），但仅从组方面来看，断言仍然失败。为什么，我应该采取哪些不同的做法？

Answer 1

它可能就像您正在测试的模型具有陈旧的关系一样简单。试试这个：

/** @test */
public function it_can_have_groups()
{
    $user = factory(User::class)->create();
    $group = factory(Group::class)->create();

    $user->addToGroup($group);
    $this->assertCount(1, $user->groups->fresh());  // true

    $user->removeFromGroup($group);
    $this->assertCount(0, $user->groups->fresh());  // false
}

Laravel 多态多对多不分离？

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