eliminated 2 db calls by using option_groups_from_collection_for_select in view (new/edit) for percentage statistics.
Full tag:
<%= option_groups_from_collection_for_select(@browsers, :browser_versions, :browser_name, "id", :version_name, @percentage_statistic.browser_version_id) %>
Again I am glad I don't call all name columns just 'name' in my tables. It's too confusing when doing tags like this!
Also added dependent => destroy for user => user_level relationship (user model).
TechTimes 