Pass global variable to laravel group route from current url

Question

I have a route group with this structure:

Route::prefix('admin/{w_id}')->middleware(['auth'])->as('weblog.')->group(function () {
    Route::get('/dashboard', [HomePageController::class, 'index'])->name('dashboard');
    Route::resource('/blogcategory', CategoryController::class);

});

On dashboard route I have w_id in url and when I want to redirect user to blogcategory route (from anywhere) I should pass w_id manully in route helper class, I need some thing to set in globally from current link.

For example when I using this method:

'route' => 'weblog.blogcategory.store'

I got error like :

Missing required parameters for [Route: weblog.blogcategory.store]

And I should pass w_id parameter to all route helper manually, I need set globally w_id from current url of page. I'm developing fully separated admin area for user's weblog and weblog id is exist in all url.

Answer 1

In order to avoid passing w_id again you will need to use URL::defaults(), it will create a default value for your parameter. You can use a middleware to pass the default value.

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\URL;

class SetDefaultWidForWeblogs
{
    public function handle($request, Closure $next)
    {
        URL::defaults(['w_id' => /* pass the default value here*/]);

        return $next($request);
    }
}

Now register the middleware in app/Http/Kernel.php class (See more description here)

protected $routeMiddleware = [
    ...

    'pass_wid' => \App\Http\Middleware\SetDefaultWidForWeblogs::class,
];

---

Then use that middleware So for your route group

Route::prefix('admin/{w_id}')->middleware(['auth', 'pass_wid'])->as('weblog.')->group(function () {
    Route::get('/dashboard', [HomePageController::class, 'index'])->name('dashboard');
    Route::resource('/blogcategory', CategoryController::class);

});

---

See in docs about default values to Url