Dynamic parameters passed to page callback

Question

I have the following hook_menu:

  $items['products/autocomplete.json/%'] = array(
    'page callback' => 'json_list_products',
    'access arguments' => array('access products')
  );

Here is the function:

function json_list_products($keywords) {

  $items = array();
  foreach(_sql_select_products($keywords) as $product) {
    $items[$product['Product_ID']] = $product['Product_Name'];
  }    

  drupal_json_output($items);
}

$keywords is not populated with the value of the % as i suspected - how do I populate this value?

Alex

Answer 1

$items['products/autocomplete.json/%'] = array(
    'page callback' => 'json_list_products',
    'access arguments' => array('access products'),
    'page arguments' => array(2),
  );

view the documentation at this link

Answer 2

Try this to start:

function mymodule_menu() {
  $items['products/autocomplete.json/%'] = array(
    'page callback' => 'json_list_products',
    'page arguments' => array(2),
    'access arguments' => array('access content'),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

function json_list_products($keywords) {
  drupal_json_output($keywords);
}

Note the following:

• Set page arguments to position in your path where you expect the arguments in your callback to be. In your case, it's 2;
• I've set access arguments to be access content which is likely to be enabled for anyone. If this works, then check if you have a access products permission when testing;
• Remember to clear your cache after modifications. If you use drush, you can use drush cc menu from the command line;
• Use MENU_CALLBACK because otherwise Drupal will add a menu item to the Navigation menu, since the default is MENU_NORMAL_ITEM.

I've tested this and http://example.org/products/autocomplete.json/cook returns:

"cook"