add('rule', TextType::class, array( 'required' => true, 'label' => 'config.form_rules.rule_label', )) ->add('save', SubmitType::class, array( 'label' => 'config.form.save', )) ; $tagsField = $builder ->create('tags', TextType::class, array( 'label' => 'config.form_rules.tags_label', )) ->addModelTransformer(new StringToListTransformer(',')); $builder->add($tagsField); } public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults(array( 'data_class' => 'Wallabag\CoreBundle\Entity\TaggingRule', )); } public function getBlockPrefix() { return 'tagging_rule'; } }