Laravel resource: How define the name of the key parameter?

When you define a resource with Route::resource('recipe', 'RecipeController');, among others, the following route is defined: /photo/{photo}/edit, and once you define all your resources you have something like this:

/recipes/{recipes}/edit
/allergens/{allergens}/edit
/ingredients/{ingredients}/edit

Because all my records use id as primary key (MongoDB), I'd like to have {id} instead, like so:

/recipes/{id}/edit
/allergens/{id}/edit
/ingredients/{id}/edit

I dug in the Router class but I don't see how to specify this.

More over when I create a form with Form::model($record) I get actions like /recipes/{recipes} because recipes is a property of $record.

How can I define the name of the key parameter to id instead of recipes, allergens, ingredients?

Solution

In order to change the param name for Route::resource, you need custom ResourceRegistrar implementation.

Here's how you can achieve that in a shortest possible way:

// AppServiceProvider (or anywhere you like)
public function register()
{
  $this->app->bind('Illuminate\Routing\ResourceRegistrar', function ($app) {

    // *php7* anonymous class for brevity,
    // feel free to create ordinary `ResourceRegistrar` class instead
    return new class($app['router']) extends \Illuminate\Routing\ResourceRegistrar 
    {

      public function register($name, $controller, array $options = [])
      {
        if (str_contains($name, '/')) {
          return parent::register($name, $controller, $options);
        }

        // ---------------------------------
        // this is the part that we override
        $base = array_get($options, 'param', $this->getResourceWildcard(last(explode('.', $name))));
        // ---------------------------------

        $defaults = $this->resourceDefaults;

        foreach ($this->getResourceMethods($defaults, $options) as $m) {
          $this->{'addResource'.ucfirst($m)}($name, $base, $controller, $options);
        }
      }
    };
  });
}

Now your routes will look like:

Route::resource('users', 'UsersController', ['param' => 'some_param'])
/users/{some_param}

// default as fallback
Route::resource('users', 'UsersController')
/users/{users}

Mind that this way can't work for nested resources and thus they will be a mix of default and custom behaviour, like this:

Route::resource('users.posts', 'SomeController', ['param' => 'id'])
/users/{users}/posts/{id}