switch to proactive autoloading. less harmfull, no load order issues.

lib/proactive_autoloader.rb

@@ -0,0 +1,71 @@
+##
+# From Urban Dictionary:
+#   proactive (91 up, 9 down)
+# 
+#   Originally a psychological term indicating an empowered, self-reliant
+#   individual, this has evolved through misuse into a neo-antonym of 'reactive',
+#   and is used as such to emphasise the preferability of one attitude or course
+#   of action over another. It connotes alertness, awareness and preparedness, and
+#   seeks to dispel any conceivable impression of incompetence.
+# 
+#   'Proactive' is interesting in that it is perhaps the classic example of the
+#   unnecessary neologism. It serves as an antonym to 'reactive', yet 'reactive'
+#   is itself the antonym of 'active'.
+# 
+#   Arguably, since 'proactive' is now perhaps more widely used than 'active' for
+#   the specific purpose covered by the newer word, 'proactive' must be recognised
+#   as a legitimate word. The cult of hatred that has understandably grown up
+#   around the word can only help it endure further.
+# 
+#   One is 'active' as opposed to being 'passive' or 'reactive'. One is
+#   'proactive' as opposed to 'speaking English'.
+module ProactiveAutoloader
+  extend self
+
+  ##
+  # Improved Module#autoload:
+  # * if path is not given, generate path according to ruby common sense
+  # * allow passing multiple constant names as symbols
+  #
+  # Example:
+  #   autoload :Foo, :Bar, :Blah
+  def autoload(*list)
+    return super if list.size == 2 and String === list.last
+    list.each do |const|
+      super const, "#{name.underscore}/#{const.to_s.underscore}"
+    end
+  end
+
+  ##
+  # Sets up autoload hooks in +klass+ for all Ruby files in +dir+, following
+  # common naming conventions. Subdirectories are *not* scanned.
+  def setup_autoloaders(klass, dir)
+    Dir.glob File.expand_path('*.rb', dir) do |file|
+      klass.autoload File.basename(file, '.rb').camelize, file
+    end
+  end
+
+  ##
+  # If subclassed, say in foo/bar.rb and there is a directory foo/bar,
+  # set up autoload hooks in subclass for all ruby files in foo/bar
+  # (see setup_autoloaders).
+  def inherited(klass)
+    auto_setup_autoloaders(klass)
+    super
+  end
+
+  ##
+  # If extending a class, say in foo/bar.rb and there is a directory foo/bar,
+  # set up autoload hooks in subclass for all ruby files in foo/bar
+  # (see setup_autoloaders).
+  def self.extended(klass)
+    auto_setup_autoloaders(klass) if klass.respond_to? :autoload
+    super
+  end
+  
+  private
+  
+  def auto_setup_autoloaders(klass)
+    setup_autoloaders klass, caller[1][/^((?!\.[^\.]+:\d+).)+/]
+  end
+end

lib/report.rb

@@ -1,13 +1,10 @@
 require 'forwardable'
+require 'proactive_autoloader'
 
 class Report < ActiveRecord::Base
-  InheritedNamespace.activate unless defined? Rails && Rails.version =~ /^3./
-
+  extend ProactiveAutoloader
   extend Forwardable
   include Enumerable
-  #belongs_to :user
-  #belongs_to :project
-  #attr_protected :user_id, :project_id, :created_at, :updated_at
   self.abstract_class = true # lets have subclasses have their own SQL tables
 
   def self.accepted_properties

lib/report/filter.rb

@@ -1,6 +1,10 @@
 require "set"
 
 class Report::Filter
+  extend ProactiveAutoloader
+  autoload :Base, 'report/filter/base'
+  autoload :NoFilter, 'report/filter/no_filter'
+
   def self.all
     @all ||= Set[]
   end

lib/report/group_by.rb

@@ -1,7 +1,12 @@
 require "set"
 
 class Report::GroupBy
+  extend ProactiveAutoloader
   include Report::QueryUtils
+  autoload :Base, 'report/group_by/base'
+  autoload :RubyAggregation, 'report/group_by/ruby_aggregation'
+  autoload :SingletonValue, 'report/group_by/singleton_value.rb'
+  autoload :SqlAggregation, 'report/group_by/sql_aggregation'
 
   def self.all
     Set[engine::GroupBy::SingletonValue]

lib/report/inherited_attribute.rb

@@ -1,6 +1,8 @@
 require 'set'
 
 module Report::InheritedAttribute
+  include Report::QueryUtils
+
   def inherited_attribute(*attributes)
       options = attributes.extract_options!
       list    = options[:list]
@@ -25,8 +27,6 @@ module Report::InheritedAttribute
       end
     end
 
-    alias singleton_class metaclass unless respond_to? :singleton_class
-
     def define_singleton_method(name, &block)
       singleton_class.send :attr_writer, name
       singleton_class.class_eval { define_method(name, &block) }

lib/report/query_utils.rb

@@ -1,5 +1,8 @@
 module Report::QueryUtils
+  alias singleton_class metaclass unless respond_to? :singleton_class
+
   delegate :quoted_false, :quoted_true, :to => "ActiveRecord::Base.connection"
+  attr_writer :engine
 
   ##
   # Subclass of Report to be used for constant lookup and such.
@@ -8,7 +11,7 @@ module Report::QueryUtils
   # @return [Class] subclass
   def engine
     return self.class.engine unless is_a? Module
-    Object.const_get(name[/^[^:]+/] || :Report)
+    @engine ||= Object.const_get(name[/^[^:]+/] || :Report)
   end
 
   ##

lib/report/result.rb

@@ -1,4 +1,6 @@
 class Report::Result
+  include Report::QueryUtils
+
   class Base
     attr_accessor :parent, :type, :important_fields
     attr_accessor :key
@@ -243,8 +245,8 @@ class Report::Result
   def self.new(value, fields = {}, type = nil, important_fields = [])
     result = begin
       case value
-      when Array then WrappedResult.new value.map { |e| new e, {}, nil, important_fields }
-      when Hash  then DirectResult.new value.with_indifferent_access
+      when Array then engine::Result::WrappedResult.new value.map { |e| new e, {}, nil, important_fields }
+      when Hash  then engine::Result::DirectResult.new value.with_indifferent_access
       when Base  then value
       else raise ArgumentError, "Cannot create Result from #{value.inspect}"
       end

lib/report/validation.rb

@@ -1,4 +1,10 @@
 module Report::Validation
+  extend ProactiveAutoloader
+  include Report::QueryUtils
+  autoload :Dates, 'report/validation/dates'
+  autoload :Integers, 'report/validation/integers'
+  autoload :Sql, 'report/validation/sql'
+
   def register_validations(*validation_methods)
     validation_methods.flatten.each do |val_method|
       register_validation(val_method)