php - Adding a 'other, please specify' option to my ChoiceType form field in Symfony -

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i'm trying create form field set of choices text input needs filled out if choose 'other':

how exercise? (*) not exercise @ moment  ( ) once month ( ) once week ( ) once day ( ) other, please specify: [             ]

currently, i'm using choicetype have set choices this:

$form->add('exercise', type\choicetype::class, array(     'label' => 'how exercise?',     'choices' => [ 'i not excerise @ moment' => 'not', ... ],     'expanded' => true,     'multiple' => false,     'required' => true,     'constraints' => [ new assert\notblank() ], ));

how 'other, please specify' option work expected?

in case need create custom form type combination of choicetype , texttype. nice intro custom form types can find id doc: http://symfony.com/doc/master/form/create_custom_field_type.html

this should similar to:

class choicewithothertype extends abstracttype {     /**      * {@inheritdoc}      */     public function buildform(formbuilderinterface $builder, array $options)     {         // prepare passed $options          $builder             ->add('choice', type\choicetype::class, $options)             ->add('other', type\texttype::class, $options)         ;          // requires custom modeltransformer         $builder->addmodeltransformer($transformer)          // constraints can added in listener         $builder->addeventlistener(formevents::pre_set_data, function (formevent $event) {             // ... adding constraint if needed         });      }      /**      * {@inheritdoc}      */     public function buildview(formview $view, forminterface $form, array $options)     {         // if needed     }      /**      * {@inheritdoc}      */     public function configureoptions(optionsresolver $resolver)     {         //      }  ));

please take at:

i think best way achieve take @ source code of datetimetype.


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