Fixed search documents to coalesce empty parent entities.

migrations/20190325001339_releases.js

@@ -97,6 +97,9 @@ exports.up = knex => Promise.resolve()
 		table.integer('priority', 2)
 			.defaultTo(0);
 
+		table.boolean('filter')
+			.defaultTo(false);
+
 		table.boolean('secondary')
 			.defaultTo(false);