Drupal 7

In this example I'm showing how to improve the Add to Cart button for Drupal Commerce products to show differently based on whether or not users have already purchased a product, or whether the product is already in their cart.

Drupal Commerce is amazing. On a recent project I had the pleasure of working with it for the first time. I understood the link between products and product displays, but there were a few things that bothered me about the relationship. This example demonstrates a simple administrative UI modification to make it easier to edit a product display node's referenced product.

Here's a simple way to remove the Read more link at the module level (in Drupal 7).
Sometimes this is preferred over doing it at the theme level (because maybe we don't want the link to appear no matter what theme is being used).

/**
 * Implementation of hook_node_view().
 */
function mymodule_node_view($node, $view_mode) {
  // Remove the "Read more" links on Registrant Form teasers
  if ($node->type == 'regform' && $view_mode == 'teaser') {
    unset($node->content['links']['node']['#links']['node-readmore']);
  }
}

The following is a list of the United States in key|value format. It's useful when creating a select list in Drupal.

AL|Alabama
AK|Alaska
AS|American Samoa
...

The following is a list of countries in key|value format. It's useful when creating a select list in Drupal.

AF|Afghanistan
AL|Albania
DZ|Algeria
...