Seems like groupings and custom scopes don't play nice in ransack: activerecord-hackery/ransack#1339

The Ajax select will always structure the query in a grouping:

Even in the case of a single parameter. A simple query will look something like this:

Would it be possible not to use groupings unless necessary? As long as custom scopes are passed on top-level this would enable filtering to work with custom scopes. It would also make queries easier to understand. The following are equivalent

{ groupings: [{m: 'or', user_name_contains: 'hug'}, combinator: 'and']}
# vs
{ user_name_contains: 'jov' }