laravel 4 - route with two bound models - php

Question

I need to check that {subcategory} has parent category {category}. How i can get the model of {category} in second binding?
I tried $route->getParameter('category');. Laravel throws FatalErrorException with message "Maximum function nesting level of '100' reached, aborting!".
Route::bind('category', function ($value) {
$category = Category::where('title', $value)->first();
if (!$category || $category->parent_id) {
App::abort(404);
}
return $category;
});
Route::bind('subcategory', function ($value, $route) {
if ($value) {
$category = Category::where('title', $value)->first();
if ($category) {
return $category;
}
App::abort(404);
}
});
Route::get('{category}/{subcategory?}', 'CategoriesController#get');
Update:
Now i made this, but i think it's not the best solution.
Route::bind('category', function ($value) {
$category = Category::where('title', $value)->whereNull('parent_id')->first();
if (!$category) {
App::abort(404);
}
Route::bind('subcategory', function ($value, $route) use ($category) {
if ($value) {
$subcategory = Category::where('title', $value)->where('parent_id', $category->id)->first();
if (!$subcategory) {
App::abort(404);
}
return $subcategory;
}
});
return $category;
});

Answer 1

You may try this and should work, code is self explanatory (ask if need an explanation):
Route::bind('category', function ($value) {
$category = Category::where('title', $value)->first();
if (!$category || $category->parent_id) App::abort(404);
return $category;
});
Route::bind('subcategory', function ($value, $route) {
$category = $route->parameter('category');
$subcategory = Category::where('title', $value)->whereParentId($category->id);
return $subcategory->first() ?: App::abort(404); // shortcut of if
});
Route::get('{category}/{subcategory?}', 'CategoriesController#get');
Update: (As OP claimed that, there is no parameter method available in Route class):
/**
* Get a given parameter from the route.
*
* #param string $name
* #param mixed $default
* #return string
*/
public function getParameter($name, $default = null)
{
return $this->parameter($name, $default);
}
/**
* Get a given parameter from the route.
*
* #param string $name
* #param mixed $default
* #return string
*/
public function parameter($name, $default = null)
{
return array_get($this->parameters(), $name) ?: $default;
}

Answer 2

I can't test this right now for you, but the closure function receives a $value and $route.
The last one is a instance of '\Illuminate\Routing\Route' (http://laravel.com/api/class-Illuminate.Routing.Route.html), and perhaps you could use the getParameter() method to retrieve some data....

Answer 3

I recently ran into same issues while trying to auto validate my stories existence inside my Session Model. So, i tried to check my Story model existence inside my Session Model using model bindings.
This is my solution
$router->bind('stories', function($value, $route) {
$routeParameters = $route->parameters();
$story = Story::where('id', $value)->where('poker_session_id', $routeParameters['poker_sessions']->id)->first();
if (!$story) {
throw new NotFoundHttpException;
}
return $story;
});
You can actually get route parameters using $route->parameters(), which returns an array. In my case, "poker_sessions" key contain an PokerSession Model, which i want.
Please be careful and use this only when you have a /category/{category}/subcategory/{subcategory} url like. Not subcategory without any {category}.
Good luck!.