Field api - sinsunsan/archiref_wiki GitHub Wiki

Ressources

• The field api is the major inovation of drupal 7, and allow modules like organic group that once have custom tables tio use the same api than other modules.
  http://drupal.org/node/707832 Field API tutorial

• Tuto to learn field api with the help of a color picker module http://www.figover.com/node/15

Drupal 6 only

• content_fields
  Fetch infos about all fields if no field name is given http://drupalcontrib.org/api/drupal/contributions%21cck%21content.module/function/content_fields/6

Attach fields to display them

• field_attach_prepare_view
  http://api.drupal.org/api/drupal/modules!field!field.attach.inc/function/field_attach_prepare_view/7
  Allow to modify field before display

• entity_prepare_view
  http://api.drupal.org/api/drupal/includes%21common.inc/function/entity_prepare_view/7
  Useful when an object is entity is called inside another entity

• field_attach_view
  http://api.drupal.org/api/drupal/modules!field!field.attach.inc/function/field_attach_view/7
  Return of a renderable array

Exemple of the use of this 3 functions in https://gist.github.com/40e049c86061a114cfde

• field_default_view
  http://api.drupal.org/api/drupal/modules!field!field.default.inc/function/field_default_view/7
  Function called when the field is viewed and transform it into a renderable array

edit a field value
http://api.drupal.org/api/drupal/modules!field!field.crud.inc

• field_info_field
  http://api.drupal.org/api/drupal/modules!field!field.info.inc/function/field_info_field/7
  Retrieve a field object in the language it'll be displayed (d7)
  For exemple we have loaded a $term object, and we want the field object of one of its fields.

$position = field_get_items('taxonomy_term', $term, 'field_term_position');

• field_get_display
  http://api.drupal.org/api/drupal/modules!field!field.module/function/field_get_display/7
  Get the display to use for a given field

• Get field language code Recupérer un champs sans se préoccuper des codes de langues(und ...) solution qui semble la plus simple

$taxonomy_major = field_get_items('node', $node, 'field_taxonomy_main', $node->language);

Autres solutions un peu moins simple

$lang = field_language('node', $node, 'field_taxonomy_main');
$term_major = $node->field_taxonomy_main[$lang][0]['tid'];