Programatically create an imagefield on an existing (non-CCK) node type

Thanks very much for this. Both those links are immensely helpful, especially the second. I'm surprised the whole of that site hasn't been incorporated into the handbook pages here on Drupal.org. I'm going to mess around with that code in the next few days, and if it's OK with everyone, I'll post a handbook page about what I learn.

Here's the code I came up with:

function create_cck_imagefield($create = TRUE) {
  module_load_include('inc', 'imagefield', 'imagefield_widget');
  module_load_include('inc', 'filefield', 'filefield_widget');
  module_load_include('inc', 'content', 'includes/content.crud');

  // Taken from a CCK export
  $field = array (
    'label' => t('Image'),
    'type_name' => 'my_node',
    'field_name' => 'my_node_image',
    'type' => 'filefield',
    'widget_type' => 'imagefield_widget',
    'change' => 'Change basic information',
    'weight' => '-4',
    'file_extensions' => 'png gif jpg jpeg',
    'progress_indicator' => 'bar',
    'file_path' => '',
    'max_filesize_per_file' => '',
    'max_filesize_per_node' => '',
    'max_resolution' => 0,
    'min_resolution' => 0,
    'custom_alt' => 0,
    'alt' => '',
    'custom_title' => 0,
    'title_type' => 'textfield',
    'title' => '',
    'use_default_image' => 0,
    'default_image_upload' => '',
    'default_image' => NULL,
    'description' => t('Image for my node'),
    'required' => 0,
    'multiple' => '1',
    'list_field' => '0',
    'list_default' => 1,
    'description_field' => '0',
    'op' => 'Save field settings',
    'module' => 'filefield',
    'widget_module' => 'imagefield',
    'columns' => array (
      'fid' => array (
        'type' => 'int',
        'not null' => false,
        'views' => true,
      ),
      'list' => array (
        'type' => 'int',
        'size' => 'tiny',
        'not null' => false,
        'views' => true,
      ),
      'data' => array (
        'type' => 'text',
        'serialize' => true,
        'views' => true,
      ),
    ),
    'display_settings' => array (
      'label' => array (
        'format' => 'above',
        'exclude' => 0,
      ),
      'teaser' => array (
        'format' => 'image_plain',
        'exclude' => 0,
      ),
      'full' => array (
        'format' => 'image_plain',
        'exclude' => 0,
      ),
      4 => array (
        'format' => 'image_plain',
        'exclude' => 0,
      ),
    ),
  );

  if (module_exists('imagefield_tokens')) {
    $field['alt'] = '[title]';
    $field['title'] = '[title]';
  }

  if ($create) {
    content_field_instance_create($field);
    variable_set('imagefield_active', TRUE);
  }
  else {
    content_field_instance_delete($field['field_name'], $field['type_name'], TRUE);
    variable_del('magefield_active');
  }
}

This code will either create or delete the imagefield, depending on what value you pass to the $create variable. I also included code to set an imagefield_active variable, so you can tell whether or not the imagefield is there if you programatically generate content for it.

Also, $field is the entire CCK export from my custom field, but I'm pretty sure you could just leave off the array fields that are empty.

This function is called by hook_install(), so the field will automatically be generated when the module is installed. (hook_uninstall() calls the function with $create = FALSE.)

If you have any criticisms, please let me know. It's tested and functional using the versions in my first post.