# Introduction
Exporting/importing bbPress data presently requires some custom code that utilizes our API: http://www.wpallimport.com/documentation/developers/action-reference/. 

Below, we have a general guide on how to do a basic forum/topics/replies migration. Keep in mind that this is only an example and you may need to modify the approach/code to make it work exactly as desired.

# Code
Save the following code in the Function Editor (All Import -> Settings):

```php
add_action( 'pmxi_saved_post', 'soflyy_forum_data', 10, 3 );

function soflyy_forum_data( $post_id, $xml_record, $is_update ) {
	global $wpdb;
	$import_id = wp_all_import_get_import_id();
	$post_type = wp_all_import_get_import_post_type( $import_id );

	switch ( $post_type ) {
		case 'topic':
			$parent_forum = get_post_meta( $post_id, '_bbp_forum_id', true );
			if ( empty( $parent_forum ) ) return;

			$forum = $wpdb->get_var( "SELECT `post_id` FROM `" . $wpdb->prefix . "postmeta` WHERE `meta_key` = '_bbp_old_forum_id' AND `meta_value` = '" . $parent_forum . "'" );
			if ( ! $forum ) return;

			update_post_meta( $post_id, '_bbp_topic_id', $post_id );
			update_post_meta( $post_id, 'post_alter_id', $post_id );
			update_post_meta( $post_id, '_bbp_last_active_time', date( "Y-m-d H:i:s", time() ) );
			update_post_meta( $post_id, '_bbp_forum_id', $forum );
			
			$args = array(
				'ID'          => $post_id,
				'post_parent' => $forum
			);
			wp_update_post( $args );
			break;

		case 'reply':
			$old_topic_id = get_post_meta( $post_id, '_bbp_topic_id', true );
			if ( empty( $old_topic_id ) ) return;

			$topic = $wpdb->get_var( "SELECT `post_id` FROM `" . $wpdb->prefix . "postmeta` WHERE `meta_key` = '_old_topic_id' AND `meta_value` = '" . $old_topic_id . "'" );
			if ( ! $topic ) return;

			update_post_meta( $post_id, '_bbp_topic_id', $topic );
			
			$forum = $wpdb->get_var( "SELECT `post_id` FROM `" . $wpdb->prefix . "postmeta` WHERE `meta_key` = '_bbp_old_forum_id' AND `meta_value` = '" . get_post_meta( $post_id, '_bbp_forum_id', true ) . "'" );
			if ( ! $forum ) return;

			update_post_meta( $post_id, '_bbp_forum_id', $forum );

			$args = array(
				'ID' => $post_id,
				'post_parent' => $topic
			);
			wp_update_post( $args );
			break;

		default:
			return;
	}
}
```

# Migrate Forums
Use WP All Export's "Migrate" feature to get all of the data you need, then download the "Bundle" file. Upload the bundle to a new import, but don't skip to the final step. Contine to step 3 and add a new custom field called "_bbp_old_forum_id" with the value being the {id[1]} import element.

# Migrate Topics
In the import, make sure the Forum ID is stored in a custom field named "_bbp_forum_id". And, add a new custom field called "_old_topic_id" with the value being the {id[1]} import element.

# Migrate Replies
Make sure the "_bbp_forum_id" and "_bbp_topic_id" custom fields are being imports with the {_bbp_forum_id[1]} and {_bbp_topic_id[1]} import elements.

# Finishing up
This may not always be necessary, but if the data on the front end of the forum looks off, you should try going to Tools -> Forums and run a repair on any of the data that looks incorrect.