passing two parameter in form cant seem to figue out - php

Question

Basically I have an event ID and User ID i need to pass in the form to store... however when i hit create it comes up with
Route pattern "/roles/{id}/{{id}}" cannot reference variable name "id" more than once.
However if i hit enter in the URL bar it works... so not to sure whats happening here... help would be greatful here the code.
Route file
// POST Add Users Race
Route::post('racehistory/{event_id}/store/{user_id}/race/', 'racehistoryController#store');
// GET Current Races
Route::get('events/currentRace', 'racingeventController#viewCurrentRace');
// GET Users
Route::get('events/{event_id}/users', 'racingeventController#users');
// GET Users with Group ID
Route::get('events/{event_id}/{group_id}', 'racingeventController#grouped');
// GET Add Users Race Form
Route::get('events/{event_id}/user/{user_id}/addrace', 'racingeventController#addUserRace');
// Add User to Event
Route::get('events/{event_id}/user/{user_id}', 'racingeventController#addUserToEvent');
// DELETE Remove User from Race Event
Route::get('events/{event_id}/delete/user/{user_id}', 'racingeventController#deleteUserToEvent');
// DELETE Race Event
Route::get('events/delete/{event_id}', 'racingeventController#destroy');
Route::resource('events', 'racingeventController');
Form View
{{ Form::open(array('class' => 'form-horizontal', 'method' => 'post', 'action' => array('racehistoryController#store', $user->id, $event->id))) }}
Controller - racehistoryController
public function store($event_id, $user_id)
{
$rules = array(
'start_event' => 'required',
'end_event' => 'required',
'pool_type' => 'required|max:3|min:3',
'name' => 'required|max:35|min:3',
'location' => 'required|max:35|min:3',
);
$validator = Validator::make(Input::all(), $rules);
if ($validator->fails()) {
return 'form works';
}
}

Answer 1

Name your route:
Route::get(
'racehistory/{event_id}/store/{user_id}/race/',
['as' => 'store', 'uses' => 'racehistoryControlle#store']
);
Fix Form::open() helper:
{{
Form::open([
'class' => 'form-horizontal',
'method' => 'post',
'route' => ['store', $user->id, $event->id]
])
}}