我创建了数据库表users,groups和group_user(MySQL).而group_user表(中间表)包含user_id和role_id.用户和群体的关系是多对多的.我想删除组表中的组.在删除组之前,我想检查是否有任何用户属于该组.
我试着这样做.
Group.PHP(型号)
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){
$group->delete();
return ['success' => 'Successfully delete group.'];
}
return ['error' => 'Failed to delete group. Group not found'];
}
但这不起作用.
最佳答案
我发现了.
service.PHP
public function deleteGroup($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."
];
}
我就是这样做的.如果还有其他方式请告诉我.谢谢.