Laravel Route Controller with Forced Parameter

Question

So i have checked out PHP - Routing with Parameters in Laravel and Laravel 4 mandatory parameters error

However using what is said - I cannot seem to make a simple routing possible unless im not understanding how filter/get/parameters works.

So what I would like to do is have a route a URL of /display/2 where display is an action and the 2 is an id but I would like to restrict it to numbers only.

I thought

Route::get('displayproduct/(:num)','SiteController@display');
Route::get('/', 'SiteController@index');

class SiteController extends BaseController {

public function index()
{

    return "i'm with index";
}

public function display($id)
{
    return $id;
}
}

The problem is that it throws a 404 if i use

Route::get('displayproduct/{id}','SiteController@display');

it will pass the parameter however the URL can be display/ABC and it will pass the parameter. I would like to restrict it to numbers only.

I also don't want it to be restful because index I would ideally would like to mix this controller with different actions.

Answer 1

假设您使用的是Laravel 4，则无法使用（：num），则需要使用正则表达式进行过滤。

Route::get('displayproduct/{id}','SiteController@display')->where('id', '[0-9]+');

Answer 2

You may also define global route patterns

Route::pattern('id', '\d+');

How/When this is helpful?

Suppose you have multiple Routes that require a parameter (lets say id ):

Route::get('displayproduct/{id}','SiteController@display');
Route::get('editproduct/{id}','SiteController@edit');

And you know that in all cases an id has to be a digit(s).

Then simply setting a constrain on ALL id parameter across all routes is possible using Route patterns

Route::pattern('id', '\d+');

Doing the above will make sure that all Routes that accept id as a parameter will apply the constrain that id needs to be a digit(s).