After uploading image_gallery and running /dev/build i get this error:

Fatal error: Class 'SortableDataObject' not found in lombardisbbq.com/image_gallery/_config.php on line 2

This is what my _config.php looks like:
(it's default from extracting it after the download)

<?php
	SortableDataObject::add_sortable_classes(array(
		"ImageGalleryItem",
		"ImageGalleryAlbum"
	)); 

	DataObject::add_extension("SiteTree","ImageGallerySiteTree");
?>

Any thoughts here?

Did you install DataObjectManager?

long sigh... that I did not. Is there a README for this? I had no idea what to do so I just did it like I did every other module I've used so far and crossed my fingers haha.

If you downloaded it from the Silverstripe extensions page, you probably saw this?

Dependencies

DataObjectManager, SWFUploadField.

:)

I found it through the search and just clicked download. What's funny is I've installed it before and had it 80% working haha.

thanks for the help!

Also should I remove gallery then do the /dev/build with the objectmanager and swfuploader then do the gallery? or is all at once ok?

got it working perfectly.
thanks so much!

Hi guys, have run this module and struck the same problem. And before you ask, YES, I do have a module called DataObjectManager-master-HEAD installed -- which I assume is the correct Data Object Manager?

Any pointers?

Make sure the DataObjectManager folder is renamed to dataobject_manager

Also, make sure your webserver has perms to access the module, I've overlooked that a couple of times
chmod -R 755 dataobject_manager