带有多个可选参数的URL

Question

Suppose I have page for searching cars, page takes 3 optional parameters, brand, year and color

Simplified route example:

Route::get('/cars/{brand?}/{year?}/{color?}', function ($brand = NULL, $year = NULL, $color = NULL) {

    echo "brand is:".$brand."<br>";
    echo "year is:".$year."<br>";
    echo "color is:".$color."<br>";

});

I don't realise how to pass for example only year parameter?

Works if passed all of 3 parameters, for example: /cars/_/2010/_ but this is very inelegant solution.

What is proper way for this ?

Answer 1

I don't know if this is possible since you may end up passing only 2 parameters and Laravel wouldn't be able to understand if this is brand, color or year.

I will leave my two cents regarding on my method of URL parameters that I use:

public function getCars(Request $request){
        Validator::validate($request->all(), [
            'brand' => 'nullable|string',
            'year' => 'nullable|integer',
            'color' => 'nullable|string'
        ]);

        $cars = Car::select('id', '...');

        if($request->has('brand')){
            // get cars with that brand
            $cars->where('brand', $request->brand);
        }

        // ... and so on with the other parameters

        $cars = $cars->paginate(10); // or $cars->get()

    }

This is a fairly simple example so you will have to customize to your needs. Hope that helps.