function content_multigroup_allowed_in in Content Construction Kit (CCK) 6.3

Helper function for deciding if a field is allowed into a Multigroup.

2 calls to content_multigroup_allowed_in()

content_multigroup_field_basic_form in modules/content_multigroup/content_multigroup.admin.inc

Alter the basic field settings form.

content_multigroup_field_overview_form_validate in modules/content_multigroup/content_multigroup.admin.inc

Validation for creating/moving fields and groups on the Manage Fields screen.

File

modules/content_multigroup/content_multigroup.admin.inc, line 135

Implementation of node type administration functions for content multigroup.

Code

function content_multigroup_allowed_in($field, $group) {
  if ($group['group_type'] != 'multigroup') {
    return array(
      'allowed' => TRUE,
      'message' => '',
    );
  }

  // We can't allow fields with more multiple values than the group has
  // to be moved into it.
  $max_existing = content_max_delta($field['field_name']);
  $group_multiple = $group['settings']['multigroup']['multiple'];
  $multiple_values = content_multigroup_multiple_values();
  if ($group_multiple != 1 && $max_existing > $group_multiple) {
    return array(
      'allowed' => FALSE,
      'message' => t('This change is not allowed. The field %field already has %multiple values in the database but the group %group only allows %group_max. Making this change would result in the loss of data.', array(
        '%field' => $field['widget']['label'],
        '%multiple' => $max_existing,
        '%group' => $group['label'],
        '%group_max' => $multiple_values[$group_multiple],
      )),
    );
  }

  // Fields that handle their own multiple values may not have the same values
  // in Multigroup fields and normal fields. We don't know if they will work or not.
  // Adding a hook here where widgets that handle their own multiple values
  // that will work correctly in Multigroups can allow their fields in.
  if (content_handle('widget', 'multiple values', $field) != CONTENT_HANDLE_CORE) {
    $allowed_widgets = array(
      'optionwidgets_select',
      'optionwidgets_buttons',
      'optionwidgets_onoff',
      'nodereference_buttons',
      'nodereference_select',
      'userreference_buttons',
      'userreference_select',
    );
    $allowed_widgets = array_merge($allowed_widgets, module_invoke_all('content_multigroup_allowed_widgets'));
    if (!in_array($field['widget']['type'], $allowed_widgets)) {
      return array(
        'allowed' => FALSE,
        'message' => t('This change is not allowed. The field %field handles multiple values differently than the Content module. Making this change could result in the loss of data.', array(
          '%field' => $field['widget']['label'],
        )),
      );
    }
  }

  // Allow other modules to intervene.
  // Any failure will prevent this action.
  foreach (module_implements('content_multigroup_allowed_in') as $module) {
    $function = $module . '_content_multigroup_allowed_in';
    $result = $function($field, $group);
    if ($result['allowed'] === FALSE) {
      return array(
        'allowed' => FALSE,
        'message' => $result['message'],
      );
    }
  }
  $message = t('You are moving the field %field into a Multigroup.', array(
    '%field' => $field['widget']['label'],
  ));
  return array(
    'allowed' => TRUE,
    'message' => $message,
  );
}