Validating dynamically loaded choices in Symfony 2

Question

I have a choice field type named *sub_choice* in my form whose choices will be dynamically loaded through AJAX depending on the selected value of the parent choice field, na

Answer 1

Suppose for sub choices you have id's right ? Create and empty array with a certain number of values and give it as a choice

$indexedArray = []; for ($i=0; $i<999; $i++){ $indexedArray[$i]= ''; }

then 'choices' => $indexedArray, :)