Is there a way to create an entity reference in hook_entity_info? I was hoping for something like the following.

'entity keys' => array(
  'id' => 'id',
  'store_ref_id' => 'store_ref_id',

I have a content type store with its ID, and a new entity_type product. I would like to have a field in the new entity referenced to content type.

How can I do this?

Would it be better to re-use the already created field, which is used as reference between content types?


1 Answer 1


You can attach this field like any other:

function MY_MODULE_install() {
  // Create a field for company reference to be used by various entities
  $field = array(
    'field_name' => 'company_reference',
    'type' => 'entityreference',
    'settings' => array(
      'target_type' => 'company',
      'handler_settings' => array('target_bundles' => NULL),
    'cardinality' => 1,
    'translatable' => FALSE,

  // Attach the company reference field to employee instance
  $instance = array(
    'field_name' => 'company_reference',
    'entity_type' => 'employee',
    'bundle' => 'employee',
    'label' => 'Company',
    'required' => false,
    'widget' => array(
      'type' => 'options_select'
    'settings' => array(
      'target_type' => 'company',
      'handler_settings' => array('target_bundles' => NULL),
    'display' => array(
      'default' => array('label' => 'inline', 'type' => 'entityreference_label'),

Code sample taken from this more comprehensive manual.

  • Do you know what is the easiest way to create admin ui? I would like to have list of all new entities and add/edit/delete actions availabe. Just like at content types.
    – gregab
    Jul 1, 2013 at 9:00
  • 1
    You mean like this? And please ask questions as questions.
    – Mołot
    Jul 1, 2013 at 9:02

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