在 Laravel 5.5 中向用户发送通知

Question

This is the scenario. I've User A that send via notification to other User B,C,D... a request to join a group. So in laravel I've created the migration and the controller to handle the notification.

This is the code of GroupController

...

foreach ($userINList as $userIN) {
            $userIN = str_replace(' ', '', $userIN);
            $userDBList = User::all();
            foreach ($userDBList as $userDB) {
                $name = $userDB->last_name . $userDB->first_name;
                $name = str_replace(' ', '', $name);
                if (strcmp($name, $userIN) == 0) {
                    $newGroup->users()->attach($userDB->id, ['role' => 'member', 'state' => 'pending']);

                    $notification = User::find($userIN->id);
                    $notification->notify(new GroupNotification($newGroup));

                }
            }

        }

...

So in $notification I'll try to pass the id of Users that receive the invite and then I use the notify() method to send the notification, but after User A created the group and there aren't notifications to User B, C, D... I've included the use Notifiable in group model. So what's the problem? What I've have to do.

Thanks

Answer 1

As far as I can tell from the code you're doing the following:

1. There is an array of names in the $userINList variable
2. You loop through each of the names in the array
3. Remove all spaces in the name
4. Retrieve every User
5. Loop through each User
6. Remove all the spaces in the User 's name
7. Compare the 2 names
8. If the comparison passes then you add the User to the group and send a notification

There are quite a few improvements we can make here. For example, we already know which users you wish to notify so you do not need to fetch and compare all users.

Firstly, $userINList should either be an array of User objects or an array of User id s — an array of User objects is better. Then you can simply iterate through each one.

For example, if you have an array of ids then you could do this:

$group = Group::find(1);
$userINList = [1, 2, 3, 4];

User::whereIn('id', $userINList)
    ->get()
    ->each(function ($user) use ($group) {
        $group->users()->attach($user->id, [
          'role' => 'member',
          'state' => 'pending'
        ]);

        $user->notify(new GroupNotification($group));
    });

And if you had an array of objects it would be even easier, you could do this:

$group = Group::find(1);

collect($users)->each(function ($user) use ($group) {
    $group->users()->attach($user->id, [
        'role' => 'member',
        'state' => 'pending'
    ]);

    $user->notify(new GroupNotification($group));
});

Super simple :-)