class City implements TypeaheadEntityInterface
{
  public static function configureTypeaheadKeys()
  {
    return [
      "cities"=>[ ]   // no options, use defaults
    ] ;
  }

  public static function configureTypeaheadColumns()
  {
    return ["display_value"];
  }
}
    

$builder->add("city", "wjb_typeahead", [
  "entity_class"=>'Main\ProgramBundle\Entity\City',
  "key"=>"cities",
  "constraints"=>[
    new Assert\NotNull( ["message"=>"You must select a city"])
  ],
]);
    

$builder->add("photos", "wjb_uploader", [
  "type"=>"image_fb_type",
  "preview"=>"500x500",
  "constraints"=>[
    new Assert\Count( [
      "min"=>1, "minMessage"=>"You must upload at least 1 image",
      "max"=>10, "maxMessage"=>"For demo purposes, number of photos per album is limited to {{ limit }}"
    ] )
  ]
]) ;

$builder->add("image_user_references", "wjb_image_tagger", [
  "options"=>[
    "data_class"=>'Main\ProgramBundle\Entity\ImageUserReference',
    "accessor"=>"user",
    "entity_class"=>'Main\ProgramBundle\Entity\User',
    "typeahead_key"=>"users",
  ]
]);
    

<form role="form" action="" method="post" novalidate="novalidate" autocomplete="off">
    
{{ form_errors(form, { 'global_errors': true }) }}
{{ form_row(form.name) }}
{{ form_row(form.city) }}

<a class="btn btn-info btn-xs wjb-uploader-files-picker pickfiles" href="#" id="pickfiles">Upload files</a>
<div class="panel panel-info">
  {{ form_row(form.photos) }}
</div>
</form>