能否将detach()方法应用于Laravel中的一对多关系? [英] can detach() method also be applied to one to many relationship in Laravel?

问题描述

在Laravel文档中，我找到了detach()方法来分离所有对象之间的多对多关系.能否将detach()方法也应用于Laravel中的一对多关系?如果没有，在这种情况下如何分离所有n个对象?

in Laravel documentation i found detach() method to detach all objects in many to many relationships. Can detach() method also be applied to one to many relationship in Laravel? if not, how can I detach all n objects in this case?

推荐答案

在多对多关系中，除非您具有特定的级联删除功能，否则detach()方法仅删除数据库中的数据透视表条目.

In many to many relationships, detach() method only delete pivot entry in your database, except if you have specific cascade deleting.

对于一对多关系，您想使用dissociate()方法解除该关系的绑定，并使用associate()将其绑定到belongsTo Side.

For one to many relationship, you want to use dissociate() method to unbind the relation and associate() to bind it on the belongsTo Side.

    $comment->post()->associate($post->id);

相反，您可以在hasMany端使用attach()添加帐户:

On the contrary, you would add account using attach() on the hasMany side:

    $post->comments()->attach($comment->id);

要删除所有评论，请执行以下操作:

To delete all comments you would do :

    $post->comments()->delete();

更多信息在这里: https://laravel.com/docs/5.6/eloquent-relationships

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