# File activerecord/lib/active_record/dynamic_finder_match.rb, line 3
3:     def self.match(method)
4:       df_match = self.new(method)
5:       df_match.finder ? df_match : nil
6:     end

    # File activerecord/lib/active_record/dynamic_finder_match.rb, line 8
 8:     def initialize(method)
 9:       @finder = :first
10:       case method.to_s
11:       when /^find_(all_by|last_by|by)_([_a-zA-Z]\w*)$/
12:         @finder = :last if $1 == 'last_by'
13:         @finder = :all if $1 == 'all_by'
14:         names = $2
15:       when /^find_by_([_a-zA-Z]\w*)\!$/
16:         @bang = true
17:         names = $1
18:       when /^find_or_(initialize|create)_by_([_a-zA-Z]\w*)$/
19:         @instantiator = $1 == 'initialize' ? :new : :create
20:         names = $2
21:       else
22:         @finder = nil
23:       end
24:       @attribute_names = names && names.split('_and_')
25:     end

    # File activerecord/lib/active_record/dynamic_finder_match.rb, line 37
37:     def bang?
38:       @bang
39:     end

    # File activerecord/lib/active_record/dynamic_finder_match.rb, line 29
29:     def finder?
30:       !@finder.nil? && @instantiator.nil?
31:     end

    # File activerecord/lib/active_record/dynamic_finder_match.rb, line 33
33:     def instantiator?
34:       @finder == :first && !@instantiator.nil?
35:     end