I have written a custom Form Handler for JMSSerializerBundle that I\'m using with FOSRestBundle. According to the documentation it should be as easy as tagging a service co
you do not enable the form error handler by tagging, but by setting the jms_serializer.form_error_handler.class parameter to point to your class:
jms_serializer.form_error_handler.class
parameters: jms_serializer.form_error_handler.class: AppBundle\Handler\FormErrorHandler