node.install

<?php


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

/**
 * Implements hook_schema().
 */
function node_schema() {
    $schema['node'] = array(
        'description' => 'The base table for nodes.',
        'fields' => array(
            'nid' => array(
                'description' => 'The primary identifier for a node.',
                'type' => 'serial',
                'unsigned' => TRUE,
                'not null' => TRUE,
            ),
            // Defaults to NULL in order to avoid a brief period of potential
            // deadlocks on the index.
'vid' => array(
                'description' => 'The current {node_revision}.vid version identifier.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => FALSE,
                'default' => NULL,
            ),
            'type' => array(
                'description' => 'The {node_type}.type of this node.',
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
                'default' => '',
            ),
            'language' => array(
                'description' => 'The {languages}.language of this node.',
                'type' => 'varchar',
                'length' => 12,
                'not null' => TRUE,
                'default' => '',
            ),
            'title' => array(
                'description' => 'The title of this node, always treated as non-markup plain text.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
            ),
            'uid' => array(
                'description' => 'The {users}.uid that owns this node; initially, this is the user that created it.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'status' => array(
                'description' => 'Boolean indicating whether the node is published (visible to non-administrators).',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 1,
            ),
            'created' => array(
                'description' => 'The Unix timestamp when the node was created.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'changed' => array(
                'description' => 'The Unix timestamp when the node was most recently saved.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'comment' => array(
                'description' => 'Whether comments are allowed on this node: 0 = no, 1 = closed (read only), 2 = open (read/write).',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'promote' => array(
                'description' => 'Boolean indicating whether the node should be displayed on the front page.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'sticky' => array(
                'description' => 'Boolean indicating whether the node should be displayed at the top of lists in which it appears.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'tnid' => array(
                'description' => 'The translation set id for this node, which equals the node id of the source post in each set.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'translate' => array(
                'description' => 'A boolean indicating whether this translation page needs to be updated.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
        ),
        'indexes' => array(
            'node_changed' => array(
                'changed',
            ),
            'node_created' => array(
                'created',
            ),
            'node_frontpage' => array(
                'promote',
                'status',
                'sticky',
                'created',
            ),
            'node_status_type' => array(
                'status',
                'type',
                'nid',
            ),
            'node_title_type' => array(
                'title',
                array(
                    'type',
                    4,
                ),
            ),
            'node_type' => array(
                array(
                    'type',
                    4,
                ),
            ),
            'uid' => array(
                'uid',
            ),
            'tnid' => array(
                'tnid',
            ),
            'translate' => array(
                'translate',
            ),
            'language' => array(
                'language',
            ),
        ),
        'unique keys' => array(
            'vid' => array(
                'vid',
            ),
        ),
        'foreign keys' => array(
            'node_revision' => array(
                'table' => 'node_revision',
                'columns' => array(
                    'vid' => 'vid',
                ),
            ),
            'node_author' => array(
                'table' => 'users',
                'columns' => array(
                    'uid' => 'uid',
                ),
            ),
        ),
        'primary key' => array(
            'nid',
        ),
    );
    $schema['node_access'] = array(
        'description' => 'Identifies which realm/grant pairs a user must possess in order to view, update, or delete specific nodes.',
        'fields' => array(
            'nid' => array(
                'description' => 'The {node}.nid this record affects.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'gid' => array(
                'description' => "The grant ID a user must possess in the specified realm to gain this row's privileges on the node.",
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'realm' => array(
                'description' => 'The realm in which the user must possess the grant ID. Each node access node can define one or more realms.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
            ),
            'grant_view' => array(
                'description' => 'Boolean indicating whether a user with the realm/grant pair can view this node.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'grant_update' => array(
                'description' => 'Boolean indicating whether a user with the realm/grant pair can edit this node.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'grant_delete' => array(
                'description' => 'Boolean indicating whether a user with the realm/grant pair can delete this node.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
        ),
        'primary key' => array(
            'nid',
            'gid',
            'realm',
        ),
        'foreign keys' => array(
            'affected_node' => array(
                'table' => 'node',
                'columns' => array(
                    'nid' => 'nid',
                ),
            ),
        ),
    );
    $schema['node_revision'] = array(
        'description' => 'Stores information about each saved version of a {node}.',
        'fields' => array(
            'nid' => array(
                'description' => 'The {node} this version belongs to.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'vid' => array(
                'description' => 'The primary identifier for this version.',
                'type' => 'serial',
                'unsigned' => TRUE,
                'not null' => TRUE,
            ),
            'uid' => array(
                'description' => 'The {users}.uid that created this version.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'title' => array(
                'description' => 'The title of this version.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
            ),
            'log' => array(
                'description' => 'The log entry explaining the changes in this version.',
                'type' => 'text',
                'not null' => TRUE,
                'size' => 'big',
            ),
            'timestamp' => array(
                'description' => 'A Unix timestamp indicating when this version was created.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'status' => array(
                'description' => 'Boolean indicating whether the node (at the time of this revision) is published (visible to non-administrators).',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 1,
            ),
            'comment' => array(
                'description' => 'Whether comments are allowed on this node (at the time of this revision): 0 = no, 1 = closed (read only), 2 = open (read/write).',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'promote' => array(
                'description' => 'Boolean indicating whether the node (at the time of this revision) should be displayed on the front page.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'sticky' => array(
                'description' => 'Boolean indicating whether the node (at the time of this revision) should be displayed at the top of lists in which it appears.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
        ),
        'indexes' => array(
            'nid' => array(
                'nid',
            ),
            'uid' => array(
                'uid',
            ),
        ),
        'primary key' => array(
            'vid',
        ),
        'foreign keys' => array(
            'versioned_node' => array(
                'table' => 'node',
                'columns' => array(
                    'nid' => 'nid',
                ),
            ),
            'version_author' => array(
                'table' => 'users',
                'columns' => array(
                    'uid' => 'uid',
                ),
            ),
        ),
    );
    $schema['node_type'] = array(
        'description' => 'Stores information about all defined {node} types.',
        'fields' => array(
            'type' => array(
                'description' => 'The machine-readable name of this type.',
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
            ),
            'name' => array(
                'description' => 'The human-readable name of this type.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
                'translatable' => TRUE,
            ),
            'base' => array(
                'description' => 'The base string used to construct callbacks corresponding to this node type.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
            ),
            'module' => array(
                'description' => 'The module defining this node type.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
            ),
            'description' => array(
                'description' => 'A brief description of this type.',
                'type' => 'text',
                'not null' => TRUE,
                'size' => 'medium',
                'translatable' => TRUE,
            ),
            'help' => array(
                'description' => 'Help information shown to the user when creating a {node} of this type.',
                'type' => 'text',
                'not null' => TRUE,
                'size' => 'medium',
                'translatable' => TRUE,
            ),
            'has_title' => array(
                'description' => 'Boolean indicating whether this type uses the {node}.title field.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'size' => 'tiny',
            ),
            'title_label' => array(
                'description' => 'The label displayed for the title field on the edit form.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
                'translatable' => TRUE,
            ),
            'custom' => array(
                'description' => 'A boolean indicating whether this type is defined by a module (FALSE) or by a user via Add content type (TRUE).',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'modified' => array(
                'description' => 'A boolean indicating whether this type has been modified by an administrator; currently not used in any way.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'locked' => array(
                'description' => 'A boolean indicating whether the administrator can change the machine name of this type.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'disabled' => array(
                'description' => 'A boolean indicating whether the node type is disabled.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
                'size' => 'tiny',
            ),
            'orig_type' => array(
                'description' => 'The original machine-readable name of this node type. This may be different from the current type name if the locked field is 0.',
                'type' => 'varchar',
                'length' => 255,
                'not null' => TRUE,
                'default' => '',
            ),
        ),
        'primary key' => array(
            'type',
        ),
    );
    $schema['block_node_type'] = array(
        'description' => 'Sets up display criteria for blocks based on content types',
        'fields' => array(
            'module' => array(
                'type' => 'varchar',
                'length' => 64,
                'not null' => TRUE,
                'description' => "The block's origin module, from {block}.module.",
            ),
            'delta' => array(
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
                'description' => "The block's unique delta within module, from {block}.delta.",
            ),
            'type' => array(
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
                'description' => "The machine-readable name of this type from {node_type}.type.",
            ),
        ),
        'primary key' => array(
            'module',
            'delta',
            'type',
        ),
        'indexes' => array(
            'type' => array(
                'type',
            ),
        ),
    );
    $schema['history'] = array(
        'description' => 'A record of which {users} have read which {node}s.',
        'fields' => array(
            'uid' => array(
                'description' => 'The {users}.uid that read the {node} nid.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
            'nid' => array(
                'description' => 'The {node}.nid that was read.',
                'type' => 'int',
                'unsigned' => TRUE,
                'not null' => TRUE,
                'default' => 0,
            ),
            'timestamp' => array(
                'description' => 'The Unix timestamp at which the read occurred.',
                'type' => 'int',
                'not null' => TRUE,
                'default' => 0,
            ),
        ),
        'primary key' => array(
            'uid',
            'nid',
        ),
        'indexes' => array(
            'nid' => array(
                'nid',
            ),
        ),
    );
    return $schema;
}

/**
 * Implements hook_install().
 */
function node_install() {
    // Populate the node access table.
    db_insert('node_access')->fields(array(
        'nid' => 0,
        'gid' => 0,
        'realm' => 'all',
        'grant_view' => 1,
        'grant_update' => 0,
        'grant_delete' => 0,
    ))
        ->execute();
}

/**
 * Implements hook_update_dependencies().
 */
function node_update_dependencies() {
    // node_update_7006() migrates node data to fields and therefore must run
    // after all Field modules have been enabled, which happens in
    // system_update_7027(). It also needs to query the {filter_format} table to
    // get a list of existing text formats, so it must run after
    // filter_update_7000(), which creates that table.
    $dependencies['node'][7006] = array(
        'system' => 7027,
        'filter' => 7000,
    );
    // node_update_7008() migrates role permissions and therefore must run after
    // the {role} and {role_permission} tables are properly set up, which happens
    // in user_update_7007().
    $dependencies['node'][7008] = array(
        'user' => 7007,
    );
    return $dependencies;
}

/**
 * Utility function: fetch the node types directly from the database.
 *
 * This function is valid for a database schema version 7000.
 *
 * @ingroup update_api
 */
function _update_7000_node_get_types() {
    $node_types = db_query('SELECT * FROM {node_type}')->fetchAllAssoc('type', PDO::FETCH_OBJ);
    // Create default settings for orphan nodes.
    $all_types = db_query('SELECT DISTINCT type FROM {node}')->fetchCol();
    $extra_types = array_diff($all_types, array_keys($node_types));
    foreach ($extra_types as $type) {
        $type_object = new stdClass();
        $type_object->type = $type;
        // In Drupal 6, whether you have a body field or not is a flag in the node
        // type table. If it's enabled, nodes may or may not have an empty string
        // for the bodies. As we can't detect what this setting should be in
        // Drupal 7 without access to the Drupal 6 node type settings, we assume
        // the default, which is to enable the body field.
        $type_object->has_body = 1;
        $type_object->body_label = 'Body';
        $node_types[$type_object->type] = $type_object;
    }
    return $node_types;
}

/**
 * @addtogroup updates-6.x-to-7.x
 * @{
 */

/**
 * Upgrade the node type table and fix node type 'module' attribute to avoid name-space conflicts.
 */
function node_update_7000() {
    // Rename the module column to base.
    db_change_field('node_type', 'module', 'base', array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
    ));
    db_add_field('node_type', 'module', array(
        'description' => 'The module defining this node type.',
        'type' => 'varchar',
        'default' => '',
        'length' => 255,
        'not null' => TRUE,
    ));
    db_add_field('node_type', 'disabled', array(
        'description' => 'A boolean indicating whether the node type is disabled.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
    ));
    $modules = db_select('system', 's')->fields('s', array(
        'name',
    ))
        ->condition('type', 'module');
    db_update('node_type')->expression('module', 'base')
        ->condition('base', $modules, 'IN')
        ->execute();
    db_update('node_type')->fields(array(
        'base' => 'node_content',
    ))
        ->condition('base', 'node')
        ->execute();
}

/**
 * Rename {node_revisions} table to {node_revision}.
 */
function node_update_7001() {
    db_rename_table('node_revisions', 'node_revision');
}

/**
 * Extend the node_promote_status index to include all fields required for the node page query.
 */
function node_update_7002() {
    db_drop_index('node', 'node_promote_status');
    db_add_index('node', 'node_frontpage', array(
        'promote',
        'status',
        'sticky',
        'created',
    ));
}

/**
 * Remove the node_counter if the statistics module is uninstalled.
 */
function node_update_7003() {
    if (drupal_get_installed_schema_version('statistics') == SCHEMA_UNINSTALLED) {
        db_drop_table('node_counter');
    }
}

/**
 * Extend the existing default preview and teaser settings to all node types.
 */
function node_update_7004() {
    // Get original settings and all types.
    $original_length = variable_get('teaser_length', 600);
    $original_preview = variable_get('node_preview', 0);
    // Map old preview setting to new values order.
    $original_preview ? $original_preview = 2 : ($original_preview = 1);
    node_type_cache_reset();
    // Apply original settings to all types.
    foreach (_update_7000_node_get_types() as $type => $type_object) {
        variable_set('teaser_length_' . $type, $original_length);
        variable_set('node_preview_' . $type, $original_preview);
    }
    // Delete old variable but leave 'teaser_length' for aggregator module upgrade.
    variable_del('node_preview');
}

/**
 * Add status/comment/promote and sticky columns to the {node_revision} table.
 */
function node_update_7005() {
    foreach (array(
        'status',
        'comment',
        'promote',
        'sticky',
    ) as $column) {
        db_add_field('node_revision', $column, array(
            'type' => 'int',
            'not null' => TRUE,
            'default' => 0,
        ));
    }
}

/**
 * Convert body and teaser from node properties to fields, and migrate status/comment/promote and sticky columns to the {node_revision} table.
 */
function node_update_7006(&$sandbox) {
    $sandbox['#finished'] = 0;
    // Get node type info for every invocation.
    node_type_cache_reset();
    if (!isset($sandbox['total'])) {
        // Initial invocation.
        // First, create the body field.
        $body_field = array(
            'field_name' => 'body',
            'type' => 'text_with_summary',
            'module' => 'text',
            'cardinality' => 1,
            'entity_types' => array(
                'node',
            ),
            'translatable' => TRUE,
        );
        _update_7000_field_create_field($body_field);
        $default_trim_length = variable_get('teaser_length', 600);
        // Get node type info, specifically the body field settings.
        $node_types = _update_7000_node_get_types();
        // Add body field instances for existing node types.
        foreach ($node_types as $node_type) {
            if ($node_type->has_body) {
                $trim_length = variable_get('teaser_length_' . $node_type->type, $default_trim_length);
                $instance = array(
                    'entity_type' => 'node',
                    'bundle' => $node_type->type,
                    'label' => $node_type->body_label,
                    'description' => isset($node_type->description) ? $node_type->description : '',
                    'required' => isset($node_type->min_word_count) && $node_type->min_word_count > 0 ? 1 : 0,
                    'widget' => array(
                        'type' => 'text_textarea_with_summary',
                        'settings' => array(
                            'rows' => 20,
                            'summary_rows' => 5,
                        ),
                        'weight' => -4,
                        'module' => 'text',
                    ),
                    'settings' => array(
                        'display_summary' => TRUE,
                    ),
                    'display' => array(
                        'default' => array(
                            'label' => 'hidden',
                            'type' => 'text_default',
                        ),
                        'teaser' => array(
                            'label' => 'hidden',
                            'type' => 'text_summary_or_trimmed',
                            'trim_length' => $trim_length,
                        ),
                    ),
                );
                _update_7000_field_create_instance($body_field, $instance);
                variable_del('teaser_length_' . $node_type->type);
            }
            // Leave 'teaser_length' variable for aggregator module upgrade.
            $sandbox['node_types_info'][$node_type->type] = array(
                'has_body' => $node_type->has_body,
            );
        }
        // Used below when updating the stored text format of each node body.
        $sandbox['existing_text_formats'] = db_query("SELECT format FROM {filter_format}")->fetchCol();
        // Initialize state for future calls.
        $sandbox['last'] = 0;
        $sandbox['count'] = 0;
        $query = db_select('node', 'n');
        $query->join('node_revision', 'nr', 'n.nid = nr.nid');
        $sandbox['total'] = $query->countQuery()
            ->execute()
            ->fetchField();
        $sandbox['body_field_id'] = $body_field['id'];
    }
    else {
        // Subsequent invocations.
        $found = FALSE;
        if ($sandbox['total']) {
            // Operate on every revision of every node (whee!), in batches.
            $batch_size = 200;
            $query = db_select('node_revision', 'nr');
            $query->innerJoin('node', 'n', 'n.nid = nr.nid');
            $query->fields('nr', array(
                'nid',
                'vid',
                'body',
                'teaser',
                'format',
            ))
                ->fields('n', array(
                'type',
                'status',
                'comment',
                'promote',
                'sticky',
                'language',
            ))
                ->condition('nr.vid', $sandbox['last'], '>')
                ->orderBy('nr.vid', 'ASC')
                ->range(0, $batch_size);
            $revisions = $query->execute();
            // Load each revision of each node, set up 'body'
            // appropriately, and save the node's field data.  Note that
            // node_load() will not return the body or teaser values from
            // {node_revision} because those columns have been removed from the
            // schema structure in memory (but not yet from the database),
            // so we get the values from the explicit query of the table
            // instead.
            foreach ($revisions as $revision) {
                $found = TRUE;
                if ($sandbox['node_types_info'][$revision->type]['has_body']) {
                    $node = (object) array(
                        'nid' => $revision->nid,
                        'vid' => $revision->vid,
                        'type' => $revision->type,
                    );
                    // After node_update_7009() we will always have LANGUAGE_NONE as
                    // language neutral language code, but here we still have empty
                    // strings.
                    $langcode = empty($revision->language) ? LANGUAGE_NONE : $revision->language;
                    if (!empty($revision->teaser) && $revision->teaser != text_summary($revision->body)) {
                        $node->body[$langcode][0]['summary'] = $revision->teaser;
                    }
                    // Do this after text_summary() above.
                    $break = '<!--break-->';
                    if (substr($revision->body, 0, strlen($break)) == $break) {
                        $revision->body = substr($revision->body, strlen($break));
                    }
                    $node->body[$langcode][0]['value'] = $revision->body;
                    // Update the revision's text format for the changes to the Drupal 7
                    // filter system. This uses the same kind of logic that occurs, for
                    // example, in user_update_7010(), but we do this here rather than
                    // via a separate set of database queries, since we are already
                    // migrating the data.
                    if (empty($revision->body) && empty($revision->format)) {
                        $node->body[$langcode][0]['format'] = NULL;
                    }
                    elseif (!in_array($revision->format, $sandbox['existing_text_formats'])) {
                        $node->body[$langcode][0]['format'] = variable_get('filter_default_format', 1);
                    }
                    else {
                        $node->body[$langcode][0]['format'] = $revision->format;
                    }
                    // This is a core update and no contrib modules are enabled yet, so
                    // we can assume default field storage for a faster update.
                    _update_7000_field_sql_storage_write('node', $node->type, $node->nid, $node->vid, 'body', $node->body);
                }
                // Migrate the status columns to the {node_revision} table.
                db_update('node_revision')->fields(array(
                    'status' => $revision->status,
                    'comment' => $revision->comment,
                    'promote' => $revision->promote,
                    'sticky' => $revision->sticky,
                ))
                    ->condition('vid', $revision->vid)
                    ->execute();
                $sandbox['last'] = $revision->vid;
                $sandbox['count'] += 1;
            }
            $sandbox['#finished'] = min(0.99, $sandbox['count'] / $sandbox['total']);
        }
        if (!$found) {
            // All nodes are processed.
            // Remove the now-obsolete body info from node_revision.
            db_drop_field('node_revision', 'body');
            db_drop_field('node_revision', 'teaser');
            db_drop_field('node_revision', 'format');
            // Remove node_type properties related to the former 'body'.
            db_drop_field('node_type', 'has_body');
            db_drop_field('node_type', 'body_label');
            // We're done.
            $sandbox['#finished'] = 1;
        }
    }
}

/**
 * Remove column min_word_count.
 */
function node_update_7007() {
    db_drop_field('node_type', 'min_word_count');
}

/**
 * Split the 'administer nodes' permission from 'access content overview'.
 */
function node_update_7008() {
    $roles = user_roles(FALSE, 'administer nodes');
    foreach ($roles as $rid => $role) {
        _update_7000_user_role_grant_permissions($rid, array(
            'access content overview',
        ), 'node');
    }
}

/**
 * Convert node languages from the empty string to LANGUAGE_NONE.
 */
function node_update_7009() {
    db_update('node')->fields(array(
        'language' => LANGUAGE_NONE,
    ))
        ->condition('language', '')
        ->execute();
}

/**
 * Add the {block_node_type} table.
 */
function node_update_7010() {
    $schema['block_node_type'] = array(
        'description' => 'Sets up display criteria for blocks based on content types',
        'fields' => array(
            'module' => array(
                'type' => 'varchar',
                'length' => 64,
                'not null' => TRUE,
                'description' => "The block's origin module, from {block}.module.",
            ),
            'delta' => array(
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
                'description' => "The block's unique delta within module, from {block}.delta.",
            ),
            'type' => array(
                'type' => 'varchar',
                'length' => 32,
                'not null' => TRUE,
                'description' => "The machine-readable name of this type from {node_type}.type.",
            ),
        ),
        'primary key' => array(
            'module',
            'delta',
            'type',
        ),
        'indexes' => array(
            'type' => array(
                'type',
            ),
        ),
    );
    db_create_table('block_node_type', $schema['block_node_type']);
}

/**
 * @} End of "addtogroup updates-6.x-to-7.x".
 */

/**
 * @addtogroup updates-7.x-extra
 * @{
 */

/**
 * Update the database from Drupal 6 to match the schema.
 */
function node_update_7011() {
    // Drop node moderation field.
    db_drop_field('node', 'moderate');
    db_drop_index('node', 'node_moderate');
    // Change {node_revision}.status field to default to 1.
    db_change_field('node_revision', 'status', 'status', array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
    ));
    // Change {node_type}.module field default.
    db_change_field('node_type', 'module', 'module', array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
    ));
}

/**
 * Switches body fields to untranslatable while upgrading from D6 and makes them language neutral.
 */
function node_update_7012() {
    // If we are upgrading from D6, then body fields should be set back to
    // untranslatable, as D6 did not know about the idea of translating fields,
    // but only nodes. If a D7 > D7 update is running we need to skip this update,
    // as it is a valid use case to have translatable body fields in this context.
    if (variable_get('update_d6', FALSE)) {
        // Make node bodies untranslatable: field_update_field() cannot be used
        // throughout the upgrade process and we do not have an update counterpart
        // for _update_7000_field_create_field(). Hence we are forced to update the
        // 'field_config' table directly. This is a safe operation since it is
        // being performed while upgrading from D6. Perfoming the same operation
        // during a D7 update is highly discouraged.
        db_update('field_config')->fields(array(
            'translatable' => 0,
        ))
            ->condition('field_name', 'body')
            ->execute();
        // Switch field languages to LANGUAGE_NONE, since initially they were
        // assigned the node language.
        foreach (array(
            'field_data_body',
            'field_revision_body',
        ) as $table) {
            db_update($table)->fields(array(
                'language' => LANGUAGE_NONE,
            ))
                ->execute();
        }
        node_type_cache_reset();
    }
}

/**
 * Change {node}.vid default value from 0 to NULL to avoid deadlock issues on MySQL.
 */
function node_update_7013() {
    db_drop_unique_key('node', 'vid');
    db_change_field('node', 'vid', 'vid', array(
        'description' => 'The current {node_revision}.vid version identifier.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => FALSE,
        'default' => NULL,
    ));
    db_add_unique_key('node', 'vid', array(
        'vid',
    ));
}

/**
 * Add an index on {node}.language.
 */
function node_update_7014() {
    db_add_index('node', 'language', array(
        'language',
    ));
}

/**
 * Enable node types that may have been erroneously disabled in Drupal 7.36.
 */
function node_update_7015() {
    db_update('node_type')->fields(array(
        'disabled' => 0,
    ))
        ->condition('base', 'node_content')
        ->execute();
}

/**
 * Change {history}.nid to an unsigned int in order to match {node}.nid.
 */
function node_update_7016() {
    db_drop_primary_key('history');
    db_drop_index('history', 'nid');
    db_change_field('history', 'nid', 'nid', array(
        'description' => 'The {node}.nid that was read.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
    ));
    db_add_primary_key('history', array(
        'uid',
        'nid',
    ));
    db_add_index('history', 'nid', array(
        'nid',
    ));
}

/**
 * @} End of "addtogroup updates-7.x-extra".
 */