How to get data from intermediate table in eloquent, silex - php

Question

I created database tables users, groups, and group_user (MySQL).And group_user table (intermediate table) contains the user_id and role_id. users and groups relationship is many to many. I want to delete a group in groups table. Before deleting a group, I want to check if there is any user belongs to that group.
I tried to do it this way.
Group.php (Model)
public function users()
{
return $this->belongsToMany('\Modules\User\Models\User');
}
Service.php
public function deleteGroup($data) {
if (!isset($data['groupID']))
return ['error' => 'Failed to delete group. Group id is required'];
$group = Group::find($data['groupID']);
if (!$group)
return ['error' => 'Failed to delete group. Group not found'];
// check any user belongs to group.
$result = $group->users()->pivot->user_id;
if(!$result){
$group->delete();
return ['success' => 'Successfully delete group.'];
}
return ['error' => 'Failed to delete group. Group not found'];
}
But this doesn't work.

Answer 1

I find it out.
service.php
public function deleteGroup($data) {
$group = Group::find($data['groupID']);
if (!$group){
return [
"msg" => "Failed to delete group. Group not found."
];
}
// find out any one belongs to the group.
$result = $group->users->first()->userID;
if ($result){
return [
"msg" => "Failed to delete group. Group has users."
];
}
$result = $group->delete($data['groupID']);
if(!$result){
return [
"msg" => "Failed to delete group."
];
}
return [
"msg" => "Successfully deleted group."
];
}
This is how I do it. If there is another way please tell me. Thanks.