php 如何在 Laravel 中重新加载关系集合？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/23364276/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do I reload a relation collection in laravel?
提问by Benubird
In laravel, after using attach() or detach() to add or remove something from a relation, the collection has not changed. So if I have a model whose realation contains [1, 2], after this:
在 Laravel 中，在使用 attach() 或 detach() 从关系中添加或删除某些内容后，集合并没有改变。因此，如果我有一个模型，其实现包含[1, 2]，在此之后：
$model->relation()->detach(1);
$model->relation()->attach(3);
it will still contain [1, 2]! How do I refresh it?
它仍然会包含[1, 2]！我如何刷新它？
回答by Benubird
You can easily tell laravel to load a relation with a single command:
你可以很容易地告诉 laravel 用一个命令加载一个关系：
$model->load('relation');
Will tell it to refresh the relation collection, and $model->relationwill now show the correct values.
将告诉它刷新关系集合，$model->relation现在将显示正确的值。
Also unloading a relation will be like this:
卸载关系也将是这样的：
$model->unsetRelation('relation')
回答by Sabrina Leggett
If you want to force all your relations to reload on an as-needed basis and you're inside your model, you can use:
如果您想根据需要强制重新加载所有关系并且您在模型中，则可以使用：
$this->relations = [];
回答by James Akwuh
It is possible to use Eloquent query builder:
可以使用 Eloquent 查询构建器：
$freshCollection = $user->roles()->get();
回答by kevinYang
Conclusion: three solutions in here
结论：这里有三个解决方案
$model->load('relation');
unset($model->relation);
$freshCollection = $user->roles()->get();`
回答by Yevgeniy Afanasyev
either just unsetit and let the system reload on demand.
要么只是unset它，让系统按需重新加载。
unset($model->relation)
or
或者
$model->unsetRelation('relation');
And let it be loaded on request.
并根据要求加载。
