在Drupal 7中为特定内容类型的图像字段添加类

Question

Currently I'm using the code as suggested in this answer . Which is the following:

function simalr_preprocess_image(&$variables) {
    if ($variables['style_name'] == 'request-background') {
    $variables['attributes']['class'][] = 'pixastic';
    $variables['attributes']['class'][] = 'pixastic-blurfast(amount=1)';
    }
}

This works fine except for the fact that I get the following error message on a page which doesn't have an Image with the 'request-background' style:

Notice: Undefined index: style_name in simalr_preprocess_image() (line 46 of /var/www/vhosts/simalr.com/httpdocs/sites/all/themes/simalr/template.php).

I only want this piece of code used on a specific content type (namely 'request'). In which way do I have to adjust the code in my template.php file in order to just use it on a page which is only of a certain content type?

Answer 1

You can still work with your code but use isset function. This will remove the warning.

If you want to do it just for a specific content type use menu_get_object function in drupal. This function will return the node for you if it's a node page.

Example:

$node = menu_get_object();

if ($node->type == 'story') {
  // TODO
}

Hope this helps.