quiz_drag_drop.install in Quiz Drag Drop 7

drag drop Install (a quiz question type)

File

quiz_drag_drop.install

<?php

/**
 * @file
 * drag drop Install (a quiz question type)
 */

/**
 * Implements hook_install().
 */
function quiz_drag_drop_install() {

  // Add body field to multichoice node.
  quiz_question_add_body_field('quiz_drag_drop');
  cache_clear_all('autoload:', 'cache');

  // At this point quiz core has created the drag drop node type.
  // Now it's time to add the image field to the node:
  if (!field_info_field('field_dragdrop_image')) {
    $field = array(
      'field_name' => 'field_dragdrop_image',
      'type' => 'image',
      'cardinality' => FIELD_CARDINALITY_UNLIMITED,
    );
    field_create_field($field);
  }
  $instance = field_info_instance('node', 'field_dragdrop_image', 'quiz_drag_drop');
  if (empty($instance)) {
    $t = get_t();
    $help_text = $t("<p>Upload images for drag drop question. Give each image a title.</p>\n                       <p><em>This image title will appear in placeholder box. So make sure title is not more than 18 characters.\n                       Otherwise it will be trimmed to 18 characters.</em></p>");
    $instance = array(
      'field_name' => 'field_dragdrop_image',
      'entity_type' => 'node',
      'bundle' => 'quiz_drag_drop',
      'label' => 'Quiz image',
      'description' => $help_text,
      'required' => TRUE,
      'settings' => array(
        'no_ui' => FALSE,
        'title_field' => TRUE,
      ),
      'widget' => array(
        'settings' => array(
          'no_ui' => FALSE,
          'max_filesize' => '1M',
          'preview_image_style' => 'thumbnail',
        ),
      ),
    );
    field_create_instance($instance);
  }
}

/**
 * Implements hook_schema().
 */
function quiz_drag_drop_schema() {

  // Stores the users answers to a question.
  $schema['quiz_drag_drop_user_answers'] = array(
    'fields' => array(
      'question_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'question_vid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'result_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'score' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array(
      'result_id',
      'question_nid',
      'question_vid',
    ),
  );
  return $schema;
}

/**
 * Implements hook_uninstall().
 */
function quiz_drag_drop_uninstall() {

  // Delete instance.
  field_delete_field('field_dragdrop_image');
  $instance = field_info_instance('node', 'field_dragdrop_image', 'quiz_drag_drop');
  field_delete_instance($instance);
  $t = get_t();
  drupal_set_message($t("The drag drop module has been uninstalled. Drag drop nodes may still exist, but they will not function properly."));
}

/**
 * Droping primary key if any from quiz_drag_drop_user_answers table, Adding indexes on question nid, result id and question vid.
 */
function quiz_drag_drop_update_101() {

  //Removing primary fields.
  db_drop_primary_key('quiz_drag_drop_user_answers');

  //Adding indexes.
  db_add_index('quiz_drag_drop_user_answers', 'nid_vid_rid', array(
    'question_nid',
    'question_vid',
    'result_id',
  ));
}

Functions

Name	Description
quiz_drag_drop_install	Implements hook_install().
quiz_drag_drop_schema	Implements hook_schema().
quiz_drag_drop_uninstall	Implements hook_uninstall().
quiz_drag_drop_update_101	Droping primary key if any from quiz_drag_drop_user_answers table, Adding indexes on question nid, result id and question vid.