laravel attach

1use Illuminate\Database\Eloquent\Builder;
2
3// Retrieve posts with at least one comment containing words like foo%...
4$posts = App\Post::whereHas('comments', function (Builder $query) {
5    $query->where('content', 'like', 'foo%');
6})->get();
7
8// Retrieve posts with at least ten comments containing words like foo%...
9$posts = App\Post::whereHas('comments', function (Builder $query) {
10    $query->where('content', 'like', 'foo%');
11}, '>=', 10)->get();

1// Detach a single role from the user...
2$user->roles()->detach($roleId);
3
4// Detach all roles from the user...
5$user->roles()->detach();

1//id for single
2$user->reasons->attach($reasonId);
3
4//array for multiple
5$user->reasons->attach($reasonIds);
6
7$user->save();