Laravel convert multidimensional collection

Question

I have a method where I store Collection s into a Collection . The Problem is that I get a multidimensional Collection and I need a one-dimensional Collection so I can use the available methods for Collection s in Laravel.

I tried it with a loop to convert my multidimensional Collection and it works fine, but I look for way to make it a little bit cleaner.

Thanks for help and hints.

$activities = new Collection();
$last       = new Collection();

foreach ($this->members()->get() as $member)
{
    $memberActivity = Activity::where('user_id', $member->id)->get();
    $activities->add($memberActivity);
}

foreach($activities as $activity)
{
    foreach($activity as $result)
    {
        $last->add($result);
    }
}

$result = $result->sortBy('created_at');

return $result->last();

Answer 1

Not sure what you are trying to achieve for certain, but this looks like a many-to-many relationship.

From your question, You appear to have 3 tables members , activities and member_activities with member_activities being your pivot table.

So you should have 2 eloquent Models: Member and Activity . See http://laravel.com/docs/5.1/eloquent-relationships#many-to-many

class Member extends Model
{
  public function activities()
  {
    return $this->belongsToMany(Activity::class, 'member_activities');
  }
}

class Activity extends Model
{
  public function members()
  {
    return $this->belongsToMany(Member::class, 'member_activities');
  }
}

So you can access a members activities by doing something like the following:

$memberWithActivities = Member::with('activities')->find($memberId);

or

$member = Member::all();
foreach ($member->activities as $activity) {
    //
}

or

$activities = Member::find($memberId)->activities()->orderBy('name')->get();

If you want to add an activity to a member, you can attach and detach - see http://laravel.com/docs/5.1/eloquent-relationships#inserting-many-to-many-relationships

nb - I've not checked my syntax, but the concept still applies.