Redirect to route with GET parameters

Question

I'd like a route that parses and puts together an array of GET parameters to redirect to another route that expects GET parameters.

I had hoped this would work, where I pass $search_params as part of the pathFor() method:

// SEARCH VIEW
$app->get('/search', function ($request, $response, $args) {
    $api = $this->APIRequest->get($request->getAttribute('path'),$request->getQueryParams());
    $args['data'] = json_decode($api->getBody(), true);
    return $this->view->render($response, 'search.html.twig', $args);
})->setName('search');

// ADVANCED SEARCH VIEW
$app->get('/advanced_search', function ($request, $response, $args) {    
    return $this->view->render($response, 'advanced_search.html.twig', $args);
});

// ADVANCED SEARCH PROCESS
$app->post('/advanced_search', function ($request, $response, $args) {    

    // get settings
    $settings = $this->get('settings');

    // get post parameters
    $qp = $request->getParsedBody();

    // translate advanced search form parameters to Solr-ese
    $search_params = array();
    $search_params['q'] = $qp['query'];

    // redirect to GET:/search, with search parameters
    $url = $this->router->pathFor('search', $search_params);    
    return $response->withStatus(302)->withHeader('Location', $url);

});

But this did not append the array $search_params as GET parameters. I understand that if the /search route had expected arguments in the URL with something like {q} it would get caught, but I need to append an unknown bunch of GET parameters.

My workaround is to do the following, manually using http_build_query() to append the GET parameters as a string to the route URL:

// SEARCH VIEW
$app->get('/search', function ($request, $response, $args) {
    $api = $this->APIRequest->get($request->getAttribute('path'),$request->getQueryParams());
    $args['data'] = json_decode($api->getBody(), true);
    return $this->view->render($response, 'search.html.twig', $args);
})->setName('search');

// ADVANCED SEARCH VIEW
$app->get('/advanced_search', function ($request, $response, $args) {    
    return $this->view->render($response, 'advanced_search.html.twig', $args);
});

// ADVANCED SEARCH PROCESS
$app->post('/advanced_search', function ($request, $response, $args) {    

    // get settings
    $settings = $this->get('settings');

    // get post parameters
    $qp = $request->getParsedBody();

    // translate advanced search form parameters to Solr-ese
    $search_params = array();
    $search_params['q'] = $qp['query'];

    // redirect to GET:/search, with search parameters
    $url = $this->router->pathFor('search')."?".http_build_query($search_params);    
    return $response->withStatus(302)->withHeader('Location', $url);

});

But that feels clunky. Am I missing something about Slim 3 and redirects?

Is it related to a POST route redirecting to a GET route? I tried using the HTTP code 307 for the withStatus() in the redirect, but as somewhat expected, that changed the method request going to /search, which doesn't work for our purposes.

Answer 1

You want to add the q-param inside the query, the router has 3 parameter:

1. The route name
2. Associative array of route pattern placeholders and replacement values
3. Associative array of query parameters

You are currently adding your q-parameter as route placeholder, that would work if you have something like this as route /search/{q} so for adding it as query parameter, use the 3rd parameter

$url = $this->router->pathFor('search', [], $search_params);