ernie/meta_search — pull request #112 by ka8725 (2012-11-17 14:29:20+00:00)
Title: Validator for "in" where clause

List of checkboxes for form helper generates array of params like this (I don't select any checkbox and use "id_in" predicate):

`[""]`

Validator pass them and gem generates wrong select like this:

`select * from smth where id in (NULL)`

So my changes fix this issue