sync laravel

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

1For example, a blog post may have an infinite number of comments. And a single
2comment belongs to only a single post  
3
4class Post extends Model
5{
6    public function comments()
7    {
8        return $this->hasMany('App\Models\Comment');
9    }
10}
11
12class Comment extends Model
13{
14    public function post()
15    {
16        return $this->belongsTo('App\Models\Post');
17    }
18}

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

1$user = User::find(1);
2
3$user->roles()->detach([1, 2, 3]);
4
5$user->roles()->attach([
6    1 => ['expires' => $expires],
7    2 => ['expires' => $expires],
8]);

1$user->roles()->attach($roleId, ['expires' => $expires]);

1$user->roles()->sync([1, 2, 3]);