tripal/tripal_organism/tripal_organism.install

<?php

/**
 * @file
 * Functions pertaining to the install/uninstall of this module
 */

/**
 * Implementation of hook_install().
 *
 * @ingroup tripal_organism
 */
function tripal_organism_install() {

  // create the module's data directory
  tripal_create_moddir('tripal_organism');

  // create the directory where image files will be stored.  We create this
  tripal_create_mod_subdir('tripal_organism', '/images');
}

/**
 * Implementation of hook_schema().
 *
 * @ingroup tripal_organism
 */
function tripal_organism_schema() {
 $schema['chado_organism'] = array(
      'fields' => array(
         'vid' => array(
            'type' => 'int',
            'unsigned' => TRUE,
            'not null' => TRUE,
            'default' => 0
          ),
         'nid' => array(
            'type' => 'int',
            'unsigned' => TRUE,
            'not null' => TRUE,
            'default' => 0
          ),
         'organism_id' => array(
            'type' => 'int',
            'not null' => TRUE,
            'default' => 0
          )
      ),
      'indexes' => array(
         'organism_id' => array('organism_id')
      ),
      'unique keys' => array(
         'nid_vid' => array('nid', 'vid'),
         'vid' => array('vid')
      ),
      'primary key' => array('nid'),
  );
  return $schema;  
}

/**
 * Implementation of hook_uninstall().
 *
 * @ingroup tripal_organism
 */
function tripal_organism_uninstall() {

  // Get the list of nodes to remove
  $sql_lib_id = "
    SELECT nid, vid 
    FROM {node} 
    WHERE type='chado_organism'
  ";
  $result = db_query($sql_lib_id);
  foreach ($result as $node) {
    node_delete($node->nid);
  }
}

/**
 * Implementation of hook_requirements(). 
 *
 */
function tripal_organism_requirements($phase) {
  $requirements = array();
  if ($phase == 'install') {
    // make sure chado is installed
    if (!tripal_core_is_chado_installed()) {
      $requirements ['tripal_organism'] = array(
            'title' => "tripal_organism",
            'value' => "ERROR: Chado most be installed before this module can be enabled",
            'severity' => REQUIREMENT_ERROR,
      );
    }
  }
  return $requirements;
}