Custom scopes don't work with Ajax Select

[thisismydesign]

Seems like groupings and custom scopes don't play nice in ransack: https://github.com/activerecord-hackery/ransack/issues/1339

The Ajax select will always structure the query in a grouping: https://github.com/platanus/activeadmin_addons/blob/51a0e4b23a1cea89cbe4b2f283115f177bac9c7f/app/javascript/activeadmin_addons/inputs/search-select.js#L40-L46

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' }

[thisismydesign]

Actually, I'm wondering if groupings is needed at all. For the purposes of this ajax call even in the case of multiple fields isn't these 2 equivalent?

{ groupings: [{m: 'or', field1: 'value', field2: 'value'}, combinator: 'and']}
# vs
{m: 'or', field1: 'value', field2: 'value'}

Perhaps groupings are only needed for nested-select? If so, this part could be simplified & fixed.