Laravel 9 pass variable from route to controller

Question

My problem: I am currently trying to refactor some of my controllers. Doing so I found these two routes:

Route::get('/events', [EventsController::class, 'eventsList'])->name('event-list'); Route::get('/courses', [EventsController::class, 'allCoursesList'])->name('all-events');

they show different filter options in the frontend.

What I want to do:

Example Code:

Route::get('/courses', [ 'all' => 1, EventsController::class, 'courseList' ])->name('all-events');

so having the ability to pass a variable, in this case all to my controller. EventsController So I can check with if in my controller and handle these routes differently with only one function instead of two.

With the current solutions on StackOverflow, users are using:

'uses'=>'myController@index'

now if I try it like this:

Route::get('/courses', [ 'all' => 1, 'uses' => 'EventsController@CourseList' ])->name('all-events');

I get the following error:

Target class [EventsController] does not exist.

Question:
What is the current, correct way, to pass a variable to a controller, from a route. In Laravel 9 and 10.

Not sure but I think you have to use the FQCN (e.g. \App\Http\Controllers\EventsController@Courselist). — D1__1
– D1__1, Commented Feb 7, 2023 at 12:21

lagbox · Accepted Answer · 2023-02-08 00:48:13Z

You can pass arbitrary data to the route as a parameter using the defaults method of Route:

Route::get('courses', [EventsController::class, 'list']) ->name('all-events') ->defaults('all', 1); Route::get('events', [EventsController::class, 'list']) ->name('event-list'); public function list(Request $request, $all = 0) { ... }

There are also other ways of using the Route to pass data.

D1__1 · Accepted Answer · 2023-02-07 13:21:40Z

Laravel versions 8 and above do not automatically apply namespace prefixes. This means that when passing the class name as a string, you need to use the fully qualified class name (FQCN).

For example:

Route::get('/courses', [ 'all' => 1, 'uses' => '\App\Http\Controllers\EventsController@CourseList' ])->name('all-events');

If it makes sense for your use case, you could also use URL parameters. For example, if your Course models belong to a Category model, you might do something like this:

Route::get('/courses/{category}', [EventsController::class, 'allCourseList');

Then in your countroller, you define the allCoursesList function like so:

public function allCoursesList(Category $category) { // ... do something with $category which is an instance of the Category model. }

Seyid Takele · Accepted Answer · 2023-02-07 13:24:48Z

You can use Route Parameters to pass variable from route to controller.

// web.php Route::get('/events/{all}', [EventsController::class, 'eventsList'])->name('event-list');

then in your controller you can access the variables

 public function eventsList(Request $request,$all){ if($all==1){ //your logic for handling the condition when $all =1 } // the remaining condition }

if you have multiple parameters you can pass them like so, you can use ? for optional parameter.

// web.php Route::get('/courses/{param_one}/{param_two?}', [EventsController::class, 'allCoursesList'])->name('all-events');

then in your controller you can access the variables

 public function allCoursesList(Request $request,$paramOne,$paramTwo){ return $paramOne.' '.$paramTwo; }

to access the query parameter

// web.php Route::get('/evets', [EventsController::class, 'allCoursesList'])->name('all-events');

if the route were /events?timeframe=0&category=1 you can access the query parameter like so

 public function allCoursesList(Request $request,$paramOne,$paramTwo){ $timeframe= $request->query('timeframe'); // do this for all the query parameters }

While this could make sense. I dont think that it could work in my case, maybe you have another idea. The URL Parameters are e.g. /events?timeframe=0&category=1

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