field_view_field

Versions

mediamosa-21

field_view_field($entity_type, $entity, $field_name, $display = array(), $langcode = NULL)

Returns a renderable array for the value of a single field in an entity.

The resulting output is a fully themed field with label and multiple values.

This function can be used by third-party modules that need to output an isolated field.

• Do not use inside node (or other entities) templates, use render($content[FIELD_NAME]) instead.
• Do not use to display all fields in an entity, use field_attach_prepare_view() and field_attach_view() instead.

The function takes care of invoking the prepare_view steps. It also respects field access permissions.

Parameters

$entity_type The type of $entity; e.g. 'node' or 'user'.

$entity The entity containing the field to display. Must at least contain the id key and the field data to display.

$field_name The name of the field to display.

$display Can be either:

• The name of a view mode. The field will be displayed according to the display settings specified for this view mode in the $instance definition for the field in the entity's bundle. If no display settings are found for the view mode, the settings for the 'full' view mode will be used.
• An array of display settings, as found in the 'display' entry of $instance definitions. The following key/value pairs are allowed:
  • label: (string) Position of the label. The default 'field' theme implementation supports the values 'inline', 'above' and 'hidden'. Defaults to 'above'.
  • type: (string) The formatter to use. Defaults to the 'default_formatter' for the field type, specified in hook_field_info(). The default formatter will also be used if the requested formatter is not available.
  • settings: (array) Settings specific to the formatter. Defaults to the formatter's default settings, specified in hook_field_formatter_info().
  • weight: (float) The weight to assign to the renderable element. Defaults to 0.

$langcode (Optional) The language the field values are to be shown in. The site's current language fallback logic will be applied no values are available for the language. If no language is provided the current language will be used.

Return value

A renderable array for the field value.

Related topics

Field API

Attach custom data fields to Drupal entities.

Code

modules/field/field.module, line 570

<?php
function field_view_field($entity_type, $entity, $field_name, $display = array(), $langcode = NULL) {
  $output = array();

  if ($field = field_info_field($field_name)) {
    if (is_array($display)) {
      // When using custom display settings, fill in default values.
      $display = _field_info_prepare_instance_display($field, $display);
    }
    else {
      // When using a view mode, make sure we have settings for it, or fall
      // back to the 'full' view mode.
      list(, , $bundle) = entity_extract_ids($entity_type, $entity);
      $instance = field_info_instance($entity_type, $field_name, $bundle);
      if (!isset($instance['display'][$display])) {
        $display = 'full';
      }
    }

    // Hook invocations are done through the _field_invoke() functions in
    // 'single field' mode, to reuse the language fallback logic.
    $options = array('field_name' => $field_name, 'language' => field_multilingual_valid_language($langcode, FALSE));
    $null = NULL;

    // Invoke prepare_view steps if needed.
    if (empty($entity->_field_view_prepared)) {
      list($id) = entity_extract_ids($entity_type, $entity);

      // First let the field types do their preparation.
      _field_invoke_multiple('prepare_view', $entity_type, array($id => $entity), $display, $null, $options);
      // Then let the formatters do their own specific massaging.
      _field_invoke_multiple_default('prepare_view', $entity_type, array($id => $entity), $display, $null, $options);
    }

    // Build the renderable array.
    $result = _field_invoke_default('view', $entity_type, $entity, $display, $null, $options);

    // Invoke hook_field_attach_view_alter() to tet other modules alter the
    // renderable array, as in a full field_attach_view() execution.
    $context = array(
      'obj_type' => $entity_type,
      'object' => $entity,
      'view_mode' => '_custom',
      'langcode' => $langcode,
    );
    drupal_alter('field_attach_view', $result, $context);

    if (isset($result[$field_name])) {
      $output = $result[$field_name];
      $output['#attached']['css'][] = drupal_get_path('module', 'field') . '/theme/field.css';
    }
  }

  return $output;
}
?>