● 回避策 @requestオブジェクトに聞いてください。 @request.env["HTTP_USER_AGENT"] # -> "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)" @request.remote_ip # -> "192.168.0.58" ● 関連 # rails/actionpack/lib/action_controller/request.rb ActionController::AbstractRequest def parameters def method def get? def post? def put? def delete? def head? def remote_ip def domain(tld_length = 1) def subdo