Custom redirect locations

[StevenClontz]

This PR extends the behavior of save_passwordless_redirect_location! to support saving custom URLs, and uses it to support implementing redirect_to parameter on the #new action. Example usage:

<%= link_to "Sign in", users_sign_in_path(redirect_to: request.url) %>

Otherwise, I don't believe there's a solution for developers to manually set a redirect location, other than something like session[redirect_session_key(User)] = params[:redirect_to] directly (which I currently have running as a before_action on session#new).

[mikker]

Interesting! Not saying this is bad – would config.success_redirect_path suffice? Or do you specifically want to set it to different things depending on context/page or something like that?

[StevenClontz]

Or do you specifically want to set it to different things depending on context/page or something like that?

Exactly. Feedback on my app was that users would click my sign in button, enter their code, and then have trouble navigating back to the page they were at when they originally tried to log in. So now my buttons have redirect_to=CURRENT_URL so the sign in route knows where to set the redirect session key.