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Explain how to check if a route exists #9845

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May 29, 2018
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Explain how to check if a route exists #9845

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22 changes: 22 additions & 0 deletions components/routing.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -229,6 +229,28 @@ a certain route::
of the current :class:`Symfony\\Component\\Routing\\RequestContext` does
not match the requirement.

Check if a Route Exists
~~~~~~~~~~~~~~~~~~~~~~~

In highly dynamic applications, it may be necessary to check whether a route
exists before using it to generate a URL. In those cases, don't use the
:method:`Symfony\\Component\\Routing\\Router::getRouteCollection` method because
that regenerates the routing cache and slows down the application.

Instead, try to generate the URL and catch the
:class:`Symfony\\Component\\Routing\\Exception\\RouteNotFoundException` thrown
when the route doesn't exist::

use Symfony\Component\Routing\Exception\RouteNotFoundException;

// ...

try {
$url = $generator->generate($dynamicRouteName, $parameters);
} catch (RouteNotFoundException $e) {
// the route is not defined...
}

Load Routes from a File
~~~~~~~~~~~~~~~~~~~~~~~

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