nodeapi_example.install

<?php


/**
 * @file
 * Install, update and uninstall functions for the nodeapi_example module.
 */

/**
 * Implements hook_schema().
 *
 * @ingroup nodeapi_example
 */
function nodeapi_example_schema() {
    $schema['nodeapi_example'] = array(
        'description' => 'Stores information of extended content.',
        'fields' => array(
            'nid' => array(
                'description' => 'Node ID that the rating is applied to.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'vid' => array(
                'description' => 'Revision ID, as we are tracking rating with node revisions',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'rating' => array(
                'description' => 'The rating of the node.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
        ),
        'primary key' => array(
            'vid',
        ),
        'indexes' => array(
            'nid' => array(
                'nid',
            ),
        ),
    );
    return $schema;
}

/**
 * Implements hook_uninstall().
 *
 * We need to clean up our variables data when uninstalling our module.
 *
 * Our implementation of nodeapi_example_form_alter() automatically
 * creates a nodeapi_example_node_type_<contentType> variable for each node type
 * the user wants to rate.
 *
 * To delete our variables we call variable_del for our variables'
 * namespace, 'nodeapi_example_node_type_'. Note that an average module would
 * have known variables that it had created, and it could just delete those
 * explicitly. For example, see render_example_uninstall(). It's important
 * not to delete variables that might be owned by other modules, so normally
 * we would just explicitly delete a set of known variables.
 *
 * hook_uninstall() will only be called when uninstalling a module, not when
 * disabling a module. This allows our data to stay in the database if the user
 * only disables our module without uninstalling it.
 *
 * @ingroup nodeapi_example
 */
function nodeapi_example_uninstall() {
    // Simple DB query to get the names of our variables.
    $results = db_select('variable', 'v')->fields('v', array(
        'name',
    ))
        ->condition('name', 'nodeapi_example_node_type_%', 'LIKE')
        ->execute();
    // Loop through and delete each of our variables.
    foreach ($results as $result) {
        variable_del($result->name);
    }
}