[Feature request] Add quick filter to collections / browse

[DBinaghi]

Hello.

It would be useful to have a quick filter function also for the collections / browse page. I guess #900 could address the issue.

Hope this helps.

[DBinaghi]

In the meantime, I've developed a plugin that is adding this feature, and other ones, to Collections: https://omeka.org/classic/plugins/CollectionsPlus/

I still think it might be a good idea to add those features to the core, as more and more users seem to have large amount of Collections in their repositories.

[zerocrates]

Can you remind me: we talked about your plugin a little before, and I recall that you needed to add a query/SQL filter to do some of what you wanted to for "quick filtering." What was that filter you had to add?

[DBinaghi]

I wanted to add an option that allows to filter only empty Collections.

I've been using this code to implement it:

if (is_admin_theme()) {
	$select = $args['select'];
	$params = $args['params'];
	if (isset($params['empty']) && $params['empty'] == 1) {
		$sql = "`collections`.id IN 
			(SELECT c.id 
			FROM `{$this->_db->Collection}` c LEFT OUTER JOIN `{$this->_db->Item}` i ON c.id = i.collection_id
			WHERE i.id IS NULL)";
		$select->where($sql);
	}
}

Of course, as you pointed out, a change in the core would be easier and shorter, with an extra case for the existing switch.