vendor/plugins/has_many_polymorphs/lib/has_many_polymorphs/dependencies.rb

   1
   2 =begin rdoc
   3 Adds a minimal dependency injection framework so that owners of polymorphic relationships reload after their children, reinjecting the child helper methods.
   4
   5 Overrides Dependencies#<tt>new_constants_in</tt>.
   6 =end
   7
   8 module Dependencies
   9
  10   mattr_accessor :injection_graph
  11   self.injection_graph = Hash.new([])
  12
  13   # Add a dependency for this target.
  14   def inject_dependency(target, *requirements)
  15     target, requirements = target.to_s, requirements.map(&:to_s)
  16     injection_graph[target] = ((injection_graph[target] + requirements).uniq - [target])
  17     requirements.each {|requirement| mark_for_unload requirement }
  18     _logger_debug "injection graph: #{injection_graph.inspect}" if Dependencies.log_activity
  19   end
  20
  21   # Make sure any dependent constants of the constants added by <tt>yield</tt> are reloaded.
  22   def new_constants_in_with_injection(*descs, &block) # chain
  23
  24     if Dependencies.log_activity
  25       _logger_debug "autoloaded constants: #{autoloaded_constants.inspect}"
  26       _logger_debug "explicitly unloadable constants: #{explicitly_unloadable_constants.inspect}"
  27     end
  28
  29     returning(new_constants_in_without_injection(*descs, &block)) do |found|
  30       _logger_debug "new constants: #{found.inspect}" if Dependencies.log_activity and found.any?
  31       found.each do |constant|
  32         injection_graph[constant].each do |requirement|
  33           requirement.constantize
  34            _logger_debug "constantized #{requirement}" if Dependencies.log_activity
  35         end
  36       end
  37     end
  38   end
  39   alias_method_chain :new_constants_in, :injection
  40
  41 end