[Plugin: Advanced Export for WP & WPMU] how to export attachments only

whilst attempting to export a large site from from WP MU 2.7 to a new home on WP 3.3.1 i ran into problems with the export bombing out and the output file truncating/corrupting after approx 10MB.

in addition, i only wanted posts – no categories, tags, or pages.

thus i resolved to export in parts, by date.

only problem, the exports were then missing any posts of type=’attachment’, thus i was left with no images to import to my new site.

the solution i found: modify the plugin to produce ONLY attachments (as another valid post type from the admin drop-down).

file: ra-export.php
function: ra_export_page
line: around 322

change from:

...
<select name="post_type" id="post_type">
<option value="all" selected="selected"><?php _e('All Content'); ?></option>
<option value="page"><?php _e('Pages'); ?></option>
<option value="post"><?php _e('Posts'); ?></option>
</select>
...

change to:

...
<select name="post_type" id="post_type">
<option value="all" selected="selected"><?php _e('All Content'); ?></option>
<option value="page"><?php _e('Pages'); ?></option>
<option value="post"><?php _e('Posts'); ?></option>
<?php /*mod jrc 300312 - allow attachments only*/ ?>
<option value="attachment"><?php _e('Attachments'); ?></option>
<?php /*end mod jrc 300312*/ ?>
</select>
...

simples. works a treat. (my only issue now is getting the ‘wordpress-importer plugin (http://wordpress.org/extend/plugins/wordpress-importer/)
– to import them reliably. hey ho.

hope this helps someone.

http://wordpress.org/extend/plugins/advanced-export-for-wp-wpmu/