Why does nothing change when I attempt to restore a backup?

Question

I have a drupal 7.43 installation and it has been doing regular backups using the Backup and Restore module. I wanted to do a restore but I'm blocked at every turn it seems. I go to Configuration >> System >> Backup and Migrate >> Saved Backups and click on "restore" next to the one I want to restore from. I get a new page where I choose "Entire Site" to restore to, as that is what I'm backing up, and then click "Restore." That takes me to a white page. When I reload my site, nothing has changed, so I assume this means failure, although I have no way of knowing what failed or why that I can tell.

So I tried drush:

drush bam-restore archive scheduled drupal.xxxxx.net-2016-03-21T09-44-17.sitearchive.tar.gz

This gave me a mysterious error:

Restoring will delete some or all of your data and cannot be undone. ALWAYS TEST YOUR BACKUPS ON A NON-PRODUCTION SERVER!
Are you sure you want to perform the restore? (y/n): y
PHP Fatal error: Call to undefined function file_directory_path() in /var/www/drupal.wealthychef.net/public_html/sites/all/modules/backup_migrate/includes/sources.archivesource.inc on line 211
Drush command terminated abnormally due to an unrecoverable error.
Error: Call to undefined function file_directory_path() in /var/www/drupal.wealthychef.net/public_html/sites/all/modules/backup_migrate/includes/sources.archivesource.inc, line 211

Can someone help me understand how to restore my site?

Answer 1

This sounds like a bug of Backup and Migrate module, since file_directory_path() no longer exists in Drupal 7.

So instead of file_directory_path() you should use:

file_stream_wrapper_get_instance_by_scheme(file_default_scheme())->getDirectoryPath()

or:

variable_get('file_public_path', conf_path() . '/files')

So please upgrade your module to development version (but it's not fixed yet at time of writing) or use this patch available at: #2618516 - Fatal error when restoring "Entire Site" which goes like:

--- a/includes/sources.archivesource.inc
+++ b/includes/sources.archivesource.inc
@@ -208,7 +208,7 @@ class backup_migrate_files_destination_archivesource extends backup_migrate_dest

       // Move the files from the temp directory.
       if ($filepath && file_exists($filepath)) {
-        _backup_migrate_move_files($filepath, file_directory_path());
+        _backup_migrate_move_files($filepath, variable_get('file_public_path', conf_path() . '/files') );
       }

Answer 2

Depending on your version of the Backup Migrate module you may have this bug https://www.drupal.org/node/2618516 - try upgrading the Backup Migrate module and see if you can then restore.

Don't forget to search Google/Duckduckgo/your-favourite-search-engine for issues, and if it is related to a specific module there is no harm in looking in the issue queue for similar issues...