Code (日本語) Rails: uninitialized constant Mail::TestMailer Sunday December 27th, 2015 Kenji Tweet Sorry, this entry is only available in 日本語. Related PostsRails: Different Code according to the EnvironmentRails: Structured LayoutOpenShift: execute rake commandRAILS 4 : Load Seed from TSV and CSV Readers who viewed this page, also viewed:(日本語) リモートワークについて考える 『強いチームはオフィスを捨てる』Author Profile Tweet