cck module: programmatically add a field of an existing type

try this:

/**
 * Create a new field for an existing content type.
 *
 * @param $content_type       Required. Existing content type (text id).
 * @param $field_name         Required. A field name using only alpha-numeric and underscores.
 * @param $field_widget_type  Required. A special name that uniquely identifies both the field type
 *                            and widget type. Each option item on the first page of the 'Add Field' form.
 * @param $properties         Optional. An array of additional properties for the field.
 *
 * NOTE: Use install add_existing_field() to add an existing field.
 *
 * TIP: You can call print_r(install_get_widget_types()); to display a list of available
 *      $field_widget_type options.
 */
function install_create_field($content_type, $field_name, $field_widget_type, $label, $properties = array()) {

  include_once(drupal_get_path('module', 'content') .'/content_admin.inc');

  // Manage weight, so that fields are ordered as they are created.
  // Pass 'weight' => ##, on the properties array to reset.
  static $weight = 1;
  $weight = isset($properties['weight']) ? $properties['weight'] : $weight + 1;

  $widget_types = install_get_widget_types();
  if (!array_key_exists($field_widget_type, $widget_types)) {
    drupal_set_message("'$field_widget_type' is not an available field/widget.");
    return;
  }

  // First step of creating the field - create the basic field.
  // Corresponds to first page of the Add field UI.
  $default_field_add = array(
    'type_name' => $content_type,
    'field_name' => $field_name,
    'field_widget_type' => $field_widget_type,
    'label' => $label,
    'op' => 'Create field',
    'submit' => 'Create field',
    'form_id' => '_content_admin_field_add_new',
  );
  // Create our new field.
  _content_admin_field_add_new_submit('_content_admin_field_add_new', $default_field_add);

  // Second step, update the field with our custom properties.
  // Corresponds to the second page (general config page) of content type creation.

  // We define defaults for a number of different field/widget types (eg. "referenceable_types"
  // is applicable to nodereference. These are ignored in cck when not applicable.
  $default_field_edit = array(
    'type_name' => $content_type,
    'field_name' => $field_name,
    'label' => $label,
    'weight' => $weight,
    'description' => '',
    'default_value_php' => '',
    'group' => 0,
    'required' => 0,
    'multiple' => FALSE,
    'text_processing' => 0,
    'max_length' => '',
    'allowed_values' => '',
    'allowed_values_php' => '',
    'rows' => 1,
    'op' => 'Save field settings',
    'submit' => 'Save field settings',
    'form_id' => '_content_admin_field',
  );
  foreach($properties as $p => $prop) {
    // Or just array merge...
    if (!isset($default_field_edit[$p])) {
      $default_field_edit[$p] = $prop;
    }
  }  
  foreach($default_field_edit AS $key => $value) {
    if (isset($properties[$key])) {
      $default_field_edit[$key] = $properties[$key];
    }
  }
  if (isset($properties['default_value'])) {
    $default_field_edit['default_value'][0]['value'] = $properties['default_value'];
  } 
  
  // Derive the widget and type from the input type.
  $widget_parts = explode('-', $field_widget_type);
  $default_field_edit['field_type'] = $widget_parts[0];
  $default_field_edit['widget_type'] = $widget_parts[1];
  $default_field_edit['module'] = $widget_parts[0] .', optionwidgets';

  _content_admin_field_submit('_content_admin_field_add_new', $default_field_edit);
}

/**
 * Returns an array of available fieldtype-widgettype arguments to
 * the $field_widget_type parameter of install_create_field()
 */
function install_get_widget_types() {
  $field_types = _content_field_types();
  $widget_types = _content_widget_types();
  $field_type_options = array();
  foreach ($field_types as $field_name => $field_type) {
    foreach ($widget_types as $widget_name => $widget_type) {
      if (in_array($field_name, $widget_type['field types'])) {
        $field_type_options[$field_name .'-'. $widget_name] = $field_type['label'] .': '. $widget_type['label'];
      }
    }
  }
  return $field_type_options;
}

like this:

  //set field properties
  $properties = array (
    'allowed_values' => "0|No\n1|Yes",
    'required' => '1',
  );

  //create field
  install_create_field('basic', 'field_basic_problematic', 'number_integer-options_select', 'Problematic', $properties);

note that I can get a list of all 'widget_types' like this:

dpr(install_get_widget_types());

Hi,

I'm with one problem. I need to present some result of query result like a field in all drupal nodes.
I pass to explain.
I execute some queries, and i need to present in node, as link to another contents. But my problem is in, how to do this....

I already change the form of add and edit, to add somes fields as i need.. But I can't add some like this in final node form.

Anyone can help me??

Thanks