function system_update_7060

Create fields in preparation for migrating upload.module to file.module.

Related topics

File

modules/system/system.install, line 2762

Code

function system_update_7060() {
    if (!db_table_exists('upload')) {
        return;
    }
    if (!db_query_range('SELECT 1 FROM {upload}', 0, 1)->fetchField()) {
        // There is nothing to migrate. Delete variables and the empty table. There
        // is no need to create fields that are not going to be used.
        foreach (_update_7000_node_get_types() as $node_type) {
            variable_del('upload_' . $node_type->type);
        }
        db_drop_table('upload');
        return;
    }
    // Check which node types have upload.module attachments enabled.
    $context['types'] = array();
    foreach (_update_7000_node_get_types() as $node_type) {
        if (variable_get('upload_' . $node_type->type, 0)) {
            $context['types'][$node_type->type] = $node_type->type;
        }
    }
    // The {upload} table will be deleted when this update is complete so we
    // want to be careful to migrate all the data, even for node types that
    // may have had attachments disabled after files were uploaded. Look for
    // any other node types referenced by the upload records and add those to
    // the list. The admin can always remove the field later.
    $results = db_query('SELECT DISTINCT type FROM {node} n INNER JOIN {node_revision} nr ON n.nid = nr.nid INNER JOIN {upload} u ON nr.vid = u.vid');
    foreach ($results as $row) {
        if (!isset($context['types'][$row->type])) {
            drupal_set_message(t('The content type %rowtype had uploads disabled but contained uploaded file data. Uploads have been re-enabled to migrate the existing data. You may delete the "File attachments" field in the %rowtype type if this data is not necessary.', array(
                '%rowtype' => $row->type,
            )));
            $context['types'][$row->type] = $row->type;
        }
    }
    // Create a single "upload" field on all the content types that have uploads
    // enabled, then add an instance to each enabled type.
    if (count($context['types']) > 0) {
        module_enable(array(
            'file',
        ));
        $field = array(
            'field_name' => 'upload',
            'type' => 'file',
            'module' => 'file',
            'locked' => FALSE,
            'cardinality' => FIELD_CARDINALITY_UNLIMITED,
            'translatable' => FALSE,
            'settings' => array(
                'display_field' => 1,
                'display_default' => variable_get('upload_list_default', 1),
                'uri_scheme' => file_default_scheme(),
                'default_file' => 0,
            ),
        );
        $upload_size = variable_get('upload_uploadsize_default', 1);
        $instance = array(
            'field_name' => 'upload',
            'entity_type' => 'node',
            'bundle' => NULL,
            'label' => 'File attachments',
            'required' => 0,
            'description' => '',
            'widget' => array(
                'weight' => '1',
                'settings' => array(
                    'progress_indicator' => 'throbber',
                ),
                'type' => 'file_generic',
            ),
            'settings' => array(
                'max_filesize' => $upload_size ? $upload_size . ' MB' : '',
                'file_extensions' => variable_get('upload_extensions_default', 'jpg jpeg gif png txt doc xls pdf ppt pps odt ods odp'),
                'file_directory' => '',
                'description_field' => 1,
            ),
            'display' => array(
                'default' => array(
                    'label' => 'hidden',
                    'type' => 'file_table',
                    'settings' => array(),
                    'weight' => 0,
                    'module' => 'file',
                ),
                'full' => array(
                    'label' => 'hidden',
                    'type' => 'file_table',
                    'settings' => array(),
                    'weight' => 0,
                    'module' => 'file',
                ),
                'teaser' => array(
                    'label' => 'hidden',
                    'type' => 'hidden',
                    'settings' => array(),
                    'weight' => 0,
                    'module' => NULL,
                ),
                'rss' => array(
                    'label' => 'hidden',
                    'type' => 'file_table',
                    'settings' => array(),
                    'weight' => 0,
                    'module' => 'file',
                ),
            ),
        );
        // Create the field.
        _update_7000_field_create_field($field);
        // Create the instances.
        foreach ($context['types'] as $bundle) {
            $instance['bundle'] = $bundle;
            _update_7000_field_create_instance($field, $instance);
            // Now that the instance is created, we can safely delete any legacy
            // node type information.
            variable_del('upload_' . $bundle);
        }
    }
    else {
        // No uploads or content types with uploads enabled.
        db_drop_table('upload');
    }
}