$or
$and
$filter = [ 'type' => '$and', 'value' => [ [ 'type' => '$like', 'target' => 'content', 'value' => 'is awesome', ], [ 'type' => '$like', 'target' => 'content', 'value' => 'is not boring', ] ] ];
$sql = Comment::filter([$filter])->toRawSql();
select * from "comments" where ( ("comments"."content" LIKE '%is awesome%') and ("comments"."content" LIKE '%is not boring%') )