2

I imported a load of content from wordpress, and I am using the teaser thumbnail module. I need to effectively click 'edit' and 'save' on all my content so that any images create thumbnails on save automatically. Is there any way to do this.

2

The image style files won't be generated when you save the node, only when the style URLs are requested for the first time.

You can generate the styles manually but I think it'll take some custom code. Without knowing more about your setup it's tricky but the following should get you started:

// Get the ids of nodes you want to generate styles for.
$nids = db_query('SELECT nid FROM {node} WHERE type = :type', array(':type' => 'my_type'))->fetchCol();

// Load the node objects
$nodes = node_load_multiple($nids);

// Setup a list of fields to generate styles for
$fields = array('field_image', 'field_image2');

// Setup a list of styles to generate
$styles = array('thumbnail', 'small');

foreach ($nodes as $node) {
  foreach ($fields as $field_name) {
    // Extract the fields items to get at the file ids.
    $image_items = field_get_items('node', $node, $field_name);

    foreach ($image_items as $image_item) {
      // Load the file
      $file = file_load($image_item['fid']);

      foreach ($styles as $style_name) {
        // Get a URI for the image style.
        $derivative_uri = image_style_path($style_name, $file->uri);

        // Create the derivative
        image_style_create_derivative($style_name, $file->uri, $derivative_uri);  
      }
    }
  }
}

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