Type error: Too few arguments to function Scheb\TwoFactorBundle\Controller\FormController::__construct(), 0 passed about two-factor-bundle

[scheb]

scheb_two_factor.form_controller:form should work, the scheb_two_factor.form_controller part is the name of the service definition, which is provided by the bundle, see here: https://github.com/scheb/two-factor-bundle/blob/master/Resources/config/two_factor.xml#L54-L60

Your workaround, using SchebTwoFactorBundle:form:form instead, cannot work. The application is missing information what services to inject into the constructor, therefore it doesn't pass any services and fails with the Too few arguments error message.

Using service names in routes is definitely a Symfony 3.4 feature, as it's described in the documentation.

In addition to using the logical name or the fully-qualified class name, Symfony supports a third way of referring to a controller. This method uses just one colon separator (e.g. service_name:indexAction) and refers to the controller as a service (see How to Define Controllers as Services).

So when you're saying "this doesnt work", what exactly doesn't work? Did you even try it?

[herrieb]

i really did try this before, but it did not work at the time.

I now copied and pasted it from your message, and voila it works.

keep up the great work!

vielen dank!