Set to 1 to group by all columns.
+=head2 where
+
+=over 4
+
+Adds to the WHERE clause.
+
+ # only return rows WHERE deleted IS NULL for all searches
+ __PACKAGE__->resultset_attributes({ where => { deleted => undef } }); )
+
+Can be overridden by passing C<{ where => undef }> as an attribute
+to a resulset.
+
+=back
+
=head2 cache
Set to 1 to cache search results. This prevents extra SQL queries if you