method

first!

rails latest stable - Class: ActiveRecord::FinderMethods

first!()

public

Same as #first but raises ActiveRecord::RecordNotFound if no record is found. Note that #first! accepts no arguments.

# File activerecord/lib/active_record/relation/finder_methods.rb, line 175
    def first!
      first || raise_record_not_found_exception!
    end