WEBVTT

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We now have control over where
the user goes after registering.

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But... it's not as awesome as it could be.

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Let me show you why.

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First, look at my app/config/security.yml file.

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In order to access any URL that start
with /admin, you need to be logged in.

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For example, if I go to /admin/genus,
it sends me to the login page.

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Thanks to Symfony's form_login
system, if we logged in,

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it would automatically redirect
us back to /admin/genus...

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which is awesome!

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That's clearly where the user wants to go.

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But what if I instead clicked a link
to register and submitted that form?

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Shouldn't that also redirect
me back to /admin/genus after?

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Yea, that would be way better: I want to
keep the user's experience really smooth.

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How can we do this?

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Guess what?

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It's almost effortless, thanks to a trait that
was added in Symfony 3.1: TargetPathTrait.

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In your subscriber, use TargetPathTrait.

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Then, down in onRegistrationSuccess,

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add $url = $this->getTargetPath()
- a method provided by that trait.

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Pass this $event->getRequest()->getSession()
and for the "provider key" argument, pass main.

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Provider key is a fancy term
for your firewall's name.

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What's going on here?

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Well, whenever you try to access a secured page
anonymously, Symfony stores that URL somewhere

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in the session before redirecting
you to the login page.

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Then form_login uses that to
redirect you after you authenticate.

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The TargetPathTrait is just a shortcut for
us to read that same key from the session.

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If $url is empty - it means the user
went directly to the registration page.

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No worries!

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Just send them to the homepage.

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Let's try the entire flow.

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I'll go back to /admin/genus: it
redirects me to the login page and sets

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that session key behind the scenes.

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Then, I'll manually type in /register
- but pretend like we clicked a link.

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Register as aquanaut6, password turtles.

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Booya! Logged in and on the /admin/genus page.

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That's a kick butt registration form.