如果数据库为空,代码将不起作用

if the database is empty, code will not work

如果数据库不包含条目,代码将不起作用。如果条目存在,则代码有效。有谁知道为什么代码只有在数据库中已有条目时才有效?

我收到超时错误:

Maximum execution time of 30 seconds exceeded

_

使用我创建用户的代码,然后将他的个人资料与邀请 URL 联系起来。创建一个长度为 7 个字符的唯一代码,即个人邀请 URL。 我需要循环,因为必须检查代码是否已生成。或者有更好的解决方案吗?

 protected function create(array $data)
{
    if($data['gender'])

    {
        $avatar = 'defaults\avatars\male.jpg';
    }

    else

    {
        $avatar = 'defaults\avatars\female.jpg';
    }

    if (array_key_exists('team_id', $data) && $data['team_id']){
        $team = $data['team_id'];
    }else{
       $team = Null;
    }

    if (isset($data['invited_id']) && $data['invited_id']){
        $invited_from = $data['invited_id'];
    }else{
        $invited_from = Null;
    }

    $user = User::create([
        'name' => $data['name'],
        'team_id' => $team,
        'invited_from_id' => $invited_from,
        'username' => $data['username'],
        'email' => $data['email'],
        'password' => bcrypt($data['password']),
        'birthday' => $data['birthday'],
        'gender' => $data['gender'],
        'slug' => str_slug($data['username']),
        'avatar' => $avatar,
        'active' => false,
        'activation_token' => str_random(255)
    ]);

    $user->profile()->save(new Profile());

    while (true) {
        $randomstring = substr(str_shuffle("0123456789abcdefghijklmnopqrstuvwxyz"), 0, 7);
        if (Invite::where('url','!=', $randomstring)->exists()) {
            Invite::create([
            'user_id' => $user->id,
            'url' => $randomstring
            ]);
            break;
        }
    }

    //store notify for user in database
    $usern = User::find($invited_from);

    if($usern) {
        User::find($usern->id)->notify(new NotifyInvite($user));
    }

    return $user;
}

问题不在于你的数据库,问题在于如果条件不满足,你永远不会跳出循环。所以 while(true) 将永远 运行。您需要为您的条件添加一个默认情况,这将退出循环。