This is my route where I'm trying to attach a category to a newly created News item.

Route::post('news', function(){
  $data = Input::only('title', 'body');
  $news = News::create($data);
  $category = Category::find(Input::get('tags')['id']);
  $news->noms()->save($category);
  $news->noms();
  return $category;
});

This is my Category model.

class Category extends \Eloquent {
  protected $table = 'categories';
  protected $fillable = array('title');    
  public function news()
  {
    return $this->morphedByMany('News', 'categoryable');
  }
}

This is my News model.

class News extends \Eloquent {
  protected $table = 'news';
  protected $softDelete = true;
  protected $fillable = array('title', 'body');    
  public function categories()
  {
    return $this->morphToMany('Category', 'categoryable');
  }
}

The error is pointing to this method in Eloquent model.php

public function morphToMany($related, $name, $table = null, $foreignKey = null, $otherKey = null, $inverse = false)
{
  $caller = $this->getBelongsToManyCaller();

  // First, we will need to determine the foreign key and "other key" for the
  // relationship. Once we have determined the keys we will make the query
  // instances, as well as the relationship instances we need for these.
  $foreignKey = $foreignKey ?: $name.'_id';

  $instance = new $related;

  $otherKey = $otherKey ?: $instance->getForeignKey();

  // Now we're ready to create a new query builder for this related model and
  // the relationship instances for this relation. This relations will set
  // appropriate query constraints then entirely manages the hydrations.
  $query = $instance->newQuery();

  $table = $table ?: str_plural($name);

  return new MorphToMany(
    $query, $this, $name, $table, $foreignKey,
    $otherKey, $caller, $inverse
  );
}

More specifically it's complaining that this method (morphToMany) doesn't know the class "Category" (my class), on this line.

$instance = new $related;

I've used composer dump-autoload in both my workbench dir and the root laravel dir, but it doesn't help.