eloquent relationships

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();

1When updating a belongsTo relationship, you may use the associate method. This 
2method will set the foreign key on the child model:
3
4	$account = App\Account::find(10);
5	$user->account()->associate($account);
6	$user->save();
7
8When removing a belongsTo relationship, you may use the dissociate method. This
9method will set the relationship foreign key to null:
10
11	$user->account()->dissociate();
12	$user->save();

1$roles = App\User::find(1)->roles()->orderBy('name')->get();