laravel：Macroable.php 第 74 行中的 BadMethodCallException：方法分离不存在
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laravel : BadMethodCallException in Macroable.php line 74: Method detach does not exist
提问by Ijaz Khan
I have three tables
我有三张桌子
usersgroupsgroup_user(a pivot table which handles the membership of users in groups)
usersgroupsgroup_user（处理组中用户成员资格的数据透视表）
I am trying to delete the membership of a user from a group like this:
我正在尝试从这样的组中删除用户的成员资格：
public function userDelete (Request $request, $userId)
{
$gid = $request->group;
$group = Group::find($gid);
$user = User::find($userId);
$user->groups->detach();
// and the second method is :
// foreach ($group->users as $user) {
// if ($user->pivot->user_id == $userId) {
// $user->detach($gid);
//
// break;
// }
// }
}
I have tried it in may ways, but it always gives the error that the method detach()is not found:
我已经尝试了多种方法，但它总是给出detach()找不到该方法的错误：
BadMethodCallException in Macroable.php line 74: Method detach does not exist.
Macroable.php 第 74 行中的 BadMethodCallException：方法分离不存在。
回答by jedrzej.kurylo
When you do $user->groups->detach(), you call detach()on the resulting groups collection.
当您执行$user->groups->detach() 时，您对生成的组集合调用detach()。
Instead, you should call the detach()method on the relation:
相反，您应该在关系上调用detach()方法：
$user->groups()->detach();
