function entity_example_field_extra_fields

Implements hook_field_extra_fields().

This exposes the "extra fields" (usually properties that can be configured as if they were fields) of the entity as pseudo-fields so that they get handled by the Entity and Field core functionality. Node titles get treated in a similar manner.

Related topics

Example: Entity
Example creating a core Entity API entity.

File

entity_example/entity_example.module, line 370

Code

function entity_example_field_extra_fields() {
    $form_elements['item_description'] = array(
        'label' => t('Item Description'),
        'description' => t('Item Description (an extra form field)'),
        'weight' => -5,
    );
    $display_elements['created'] = array(
        'label' => t('Creation date'),
        'description' => t('Creation date (an extra display field)'),
        'weight' => 0,
    );
    $display_elements['item_description'] = array(
        'label' => t('Item Description'),
        'description' => t('Just like title, but trying to point out that it is a separate property'),
        'weight' => 0,
    );
    // Since we have only one bundle type, we'll just provide the extra_fields
    // for it here.
    $extra_fields['entity_example_basic']['first_example_bundle']['form'] = $form_elements;
    $extra_fields['entity_example_basic']['first_example_bundle']['display'] = $display_elements;
    return $extra_fields;
}