Hello, everyone!

I propose this change to allow config.paginate option to be set as a block that will return a value based on resource configuration.

In my case, I have a Sessions resource with an index that can be displayed as a table (default view) and as a calendar. With the calendar view, the pagination is replaced by the start/end time filter.

Using this change I can initialize resources in the following way:

ActiveAdmin.register Session, as: "All Sessions" do
  config.paginate = proc { params[:as] != "calendar" }
  index(as: :calendar)
end

which will allow ActiveAdmin::Views::IndexAsCalendar will handle filtering instead of pagination.

Thank you for your attention! Please, tell me what you think about it.