getdata on File input to return only filename, not array of details - zend-framework2

Question

I have a form that has a fieldset with a file upload field in it. When I do a var_dump on $form->getData() I am being shown an array of data for the file field:
array (size=13)
'logo' =>
array (size=5)
'name' => string 'my-image.gif' (length=12)
'type' => string 'image/gif' (length=9)
'tmp_name' => string 'C:\xampp\htdocs\images\my-image.gif' (length=35)
'error' => int 0
'size' => int 391
//... other fields here
How do get the element to return only the name when I call getData?
e.g.
array (size=13)
'logo' => string 'my-image.gif' (length=12)
//... other fields here
I am using the form for other things and have already overridden getData so would like to keep the answer located in the fieldset.

Answer 1

You can override the getData() method in your form.
public function getData()
{
$data = parent::getData();
$logo = $data['logo'];
$data['logo'] = $logo['name'];
return $data;
}
Add all necessary precautions to ensure the existence of the keys in the arrays.
Supplements for a fieldset
Using a fileset, you can use a Filter to change the return file structure :
namespace your\namespace;
use Zend\Filter;
class FilterFileName extends Filter\AbstractFilter
{
public function filter($value)
{
if (! is_scalar($value) && ! is_array($value)) {
return $value;
}
if (is_array($value)) {
if (! isset($value['name'])) {
return $value;
}
$return = $value['name'];
} else {
$return = $value;
}
return $return;
}
}
Your fieldset class must implement InputFilterProviderInterface
use your\namespace\FilterFileName;
class YourFieldset extends ZendFiedset implements InputFilterProviderInterface
{
public function __construct()
{
// your code ... like :
parent::__construct('logo');
$file_element = new Element\File('my-element-file');
$file_element->setLabel('Chooze')
->setAttribute('id', 'my-element-file')
->setOption('error_attributes', [
'class' => 'form-error'
]);
$this->add($file_element);
}
public function getInputFilterSpecification()
{
return [
'element-file' => [
'name' => 'my-element-file',
'filters' => [
['name' => FilterFileName::class]
]
]
];
}
}
You can chain multiple filters, eg to rename the file before.