Custom Service Resource with Arguments

Edit the my_module_services.inc file to the following for passing arguments.

<?php

function my_module_services_resources() {
  $resources = array(
    'my_module_resources' => array(
      'actions' => array(
        'get_user_email' => array(
          'help' => t('Gets user email of uid passed.'),
          'file' => array(
            'type' => 'inc',
            'module' => 'my_module',
            'name' => 'my_module.resource',
          ),
          'callback' => 'my_module_get_user_email',
          'args' => array(
            array(
              'name'         => 'my_param',
              'type'         => 'int',
              'description'  => t(' uid to pass.'),
              'source'       => array('data' => 'my_param'),
              'optional'     => FALSE,
            ),
          ),
          'access callback' => '_drupalgap_resource_access',
          'access callback file' => array(
            'type' => 'inc',
            'module' => 'drupalgap',
            'name' => 'drupalgap.resource',
          ),
          'access arguments' => array('access user profiles'),
          'access arguments append' => TRUE,
        ),
      ),
    ),
  );
  return $resources;
}

Note: Since we changed the Resources action you will need to follow the steps from # 4 of Create a Custom Service Page.

Now adjust your my_module.resources.inc file to include a new function like the following:

function my_module_get_user_email($uid) {
  $query = db_select('users', 'u')
    ->fields('u', array('mail'))
    ->condition('uid', $uid, '=');
  $result = $query->execute();
  return $result->fetchField();
}

If using Method 1 from the previous page, you will need to add a new function to your custom DrupalGap module's JavaScript file like so:

function my_module_get_user_email(options) {
  try {
    options.method = 'POST';
    options.path = 'my_module_resources/get_user_email.json';
    options.service = 'my_module';
    options.resource = 'get_user_email';
    Drupal.services.call(options);
  }
  catch (error) {
    console.log('my_module_get_user_email - ' + error);
  }
}

Still using Method 1 from previous page you can edit your javascript in your module to the following:

var my_args = {
  my_param: 123
};
my_module_get_user_count({
    data: my_args,
    success: function(result) {
      var user_count = result[0];
      alert('There are ' + user_count + ' registered user(s)!');
    }
});

Depending on your service resource, you may have to turn your args into a string when sending them:

data: JSON.stringify(my_args)