Laravel - 404 | Not Found upon "/{id}" entry - php

Question

I am getting a "404 | Not Found" error when i try to access a specific item from my database. The items with the specific ID's do exist in the database, but i am not even sure if that even has any influence on the problem.
My routing looks likes this:
Route::prefix('departments')->group(function() {
Route::get('/{id}', [DepartmentController::class, 'showDepartment']);
});
And the related controller looks like this:
public function showDepartment() {
return '';
}
}
I haven't yet finished the function. I just wanted to check if the routing even worked by returning an empty string.
So what am i doing wrong? Is it the routing or the controller?

Answer 1

According to the Laravel documentation, you have to define the parameter in the route then use it in the controller as a parameter.
in your controller:
public function showDepartment($id) {
return 'Hello';
}
The id is not bound to any model to fetch from the database to do that you can use Laravel route model binding
for example when you have a model named Department you write your route like this:
Route::get('/{department}', [DepartmentController::class, 'showDepartment']);
and in the controller:
public function showDepartment(Department $department) {
return 'Hello from depratment';
}
When your department exists it returns the response otherwise return 404.

Answer 2

You may need a Department model class. Then you can find the item from database by id $department = Department::findOrFail($id);

Answer 3

you are send parameter in route and this function without any parameter
route :
Route::prefix('departments')->group(function() {
Route::get('/{id}', [DepartmentController::class, 'showDepartment']);
});
your function in controller should be
public function showDepartment($id) {
$department = Department::findOrFail($id);
}
}