Acces raw data in Drupal 8 view template -

in overridden template of view module (views-view-field.html.twig), i'm trying access raw data of field.

in doc file, can read this:

 * available variables: ...  * - fields: list of fields, each 1 contains: ...  *   - raw: raw data field, if exists. not output safe. ... 

but it's alway's empty.

{{ dump(fields.field_myfieldname) }} 

print object(stdclass)[1899] ...

{{ dump(fields.field_myfieldname.raw) }} 

print null

i want raw build file path value of field.

why it's empty? there other whay raw data of field in template ?

edit : i'm trying this:

 <img src="/path/to/image/{{ fields.title.raw | escape('uri')}}.jpg" />  

why hard ?

instead of building stuff in twig files, should instead preprocess data , reference new variable in twig file.

for example, if custom theme called mytheme, in mytheme.theme file, add following function

function mytheme_preprocess_field(&$variables, $hook) {    if( $variables['field_name'] === 'field_myfieldname') {      // manipulate data , return in variable.      $data = $variables['items'][0]['content']['#context']['value'];      $variables['customfield'] = "whatever want, can html";      } } 

then in field--node--field-myfieldname.html.twig file, call new variable

{{ customfield }} 

if returning html, call new variable so

{{ customfield|raw }}