忽略Laravel中的可选参数？

Question

Currently within my routes file I've got the following Route defined:

Route::get('{country}/{county}/{city?}/{id}', 'AdsController@show')->name('show')->where('id', '[0-9]+');

And within the AdsController I've got the following function:

public function show($country, $region, $city = null, $id) {
    if($city !== null)
        echo "we do something here extra";
    echo "Let's run our normal function";
}

The only issue is it appears that I must pass the $city variable? for instance, if I access http://example.com/mycountry/myregion/mycity/1 it works fine? but if I was to run http://example.com/mycountry/myregion/1 it shows a 404 is their anyway around this other than creating multiple routes?

Answer 1

You would have to create two separate routes. Laravel won't interpret a blank slash (/) as a null variable.

You could also pass a zero ('0') value in the route URI (example: /mycountry/myregion/0/1).

Also, you could place the optional route parameters at the end of the route. That may help.