Update gems. Care fore secret_key_base. (It does not work)
Comment out attr_accessible and attr_protected (comments will be deleted when strong parameters are done).
Fix routes.rb for Rails4
[#64961508] Fix deprecated find parameters in has_many.
Change return code.
[#64961508] Use ActiveRecord::FixtureSet instead of ActiveRecord::Fixtures.
[#64961508] Replace sope content from hash to scope.
[#64961508] Stop using find(:all).
[#64961508] Stop using find(:first).
[#64961508] Replace with_scope to scoping.
[#64961508] Fix find_by_xxx.
[#64961508] Fix find_all_by_xxx.
[#64961508] Fix find_or_create_by_xxx.
[#64961508] Use scope for sum.
[#64961508] Use where for first.
[#64961508] Use scope for update_all.
[#64961508] Remove all.
[#64961508] Remove options to find.
Remove .all.
Fix options for .first.