ActiveRecord::DynamicMatchers::FindBy Ruby on Rails 5.1.2 Class ActiveRecord::DynamicMatchers::FindBy < ActiveRecord::DynamicMatchers::Method activerecord/lib/active_record/dynamic_matchers.rb Methods F finder P prefix Class Public methods prefix() Link Source: show | on GitHub # File activerecord/lib/active_record/dynamic_matchers.rb, line 97 def self.prefix "find_by" end Instance Public methods finder() Link Source: show | on GitHub # File activerecord/lib/active_record/dynamic_matchers.rb, line 101 def finder "find_by" end