Calculates the "start" and "rows" Solr params by inspecting the :per_page and :page params.
# File lib/rsolr/pagination.rb, line 5 def self.calculate_start_and_rows page, per_page per_page = per_page.to_s.to_i page = page.to_s.to_i-1 page = page < 1 ? 0 : page start = page * per_page [start, per_page] end