Laravel migration won't reference second foreign key - laravel

Question

I am trying to reference the id of a product on two tables (a categories and a brands table).
public function up()
{
Schema::create('products', function($table)
{
$table->increments('id');
$table->integer('category_id')->unsigned();
$table->integer('brand_id')->unsigned();
$table->string('title');
$table->text('description');
$table->decimal('price', 6, 2);
$table->boolean('availability')->default(1);
$table->string('image');
$table->timestamps();
});
Schema::table('products', function($table){
$table->foreign('category_id')->references('id')->on('categories');
$table->foreign('brand_id')->references('id')->on('brands');
});
}
But I get the following errors:
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL
: alter table `products` add constraint products_brand_id_foreign foreign k
ey (`brand_id`) references `brands` (`id`))
[PDOException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint
Which is the correct way to do this?
Update
Migration public function up for the brands table
public function up()
{
Schema::create('brands', function($table){
$table->increments('id');
$table->string('name');
$table->timestamps();
});
}
Solution
Finally, the error was on the naming of the migration. Due to the fact that brands table was the most recent table I had to changed its name from: 2014_12_12_164325_create_brands_table to this 2014_10_12_164325_create_brands_table and the tables were migrated successfully.

Answer 1

Everything looks ok to me. Furthermore, since it only complains about the second part, the categories foreign key must've worked. I would think the brands table doesn't exist or there is something wrong there. Does the table exist and does it have a primary key "id"?
I also use
$table->engine = 'InnoDB';
at the beginning, because MyISAM doesn't support foreign keys as of now. I don't think it should be an issue in the above case, but perhaps still advisable, if you want to do foreign key restrictions on the DB level.