<?php

/**
 * @file data_entity.install
 * Contains install hooks.
 */

/**
 * Update the settings on data tables used as entities.
 */
function data_entity_update_7000() {
  $tables = data_get_all_tables();

  foreach ($tables as $table_name => $table) {
    if (!isset($table->table_schema['primary key'])) {
      // Skip tables that don't have a primary key.
      continue;
    }

    data_entity_meta_add_defaults($table->meta);
    $meta = $table->get('meta');

    // All tables were hitherto declared as entity types.
    $meta['is_entity_type'] = TRUE;

    // Prior to this update, all data entity types assumed there was a single
    // primary key to use as the entity id field.
    $id_field = $table->table_schema['primary key'][0];
    $meta['entity_id'] = $id_field;

    // Update the table.
    $table->update(array('meta' => $meta));
  }

  return t('Table settings have been updated.');
}