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From 36f25bf11b9e61b6361c829534dea2de0cf08acd Mon Sep 17 00:00:00 2001
From: Chris Hapgood <cch1@hapgoods.com>
Date: Mon, 11 Oct 2010 09:42:05 -0400
Subject: [PATCH] Let respond_to do the heavy action cache lifting

In determining the best content type for a response, let respond_to consider
available content types using existing logic.  Work hard to ensure that
cached content has an extension to indicate its content type.
---
 .../lib/action_controller/caching/actions.rb       |   73 ++++++++++----------

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require 'benchmark'

ISO_DATETIME = /\A(\d{4})-(\d\d)-(\d\d) (\d\d):(\d\d):(\d\d)(\.\d+)?\z/
FAST_ISO_DATETIME = /\A(\d{4})-(\d\d)-(\d\d) (\d\d):(\d\d):(\d\d)(?:\.(\d+))?\z/
COUNT = 1000000
SRAND = 1455677931
DATETIME_STRING = "2010-01-12 12:34:56.%6.6i"

Benchmark.bm do |bench|
  f = bench.report("Fast") do

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# Recursively coerce empty string values in hash -particularly
# useful for HTTP POSTed forms.
# Values are coerced based on the rules mapping of params_hash keys to coerced values.
# See http://dev.rubyonrails.org/ticket/5694 for background
def self.coerce_empty_strings(params_hash, rules = {})
  return unless params_hash
  params_hash.each_pair do |k,v|
    # AR::Base.extract_callstack_for_multiparameter_attributes can't handle nil values
    unless k.include?('(')
      params_hash[k] = rules[k.to_sym] if v.kind_of?(String) && v.empty?

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module ActiveRecord
  class Reflection::AssociationReflection
    # Return a named scope instead of the bare ActiveRecord::Base subclass.
    def klass_with_scope
      k = klass_without_scope
      options[:scope].nil? ? k : k.send(options[:scope])
    end
    alias_method_chain :klass, :scope
  end

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diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 7f78191..e55b639 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1557,7 +1557,8 @@ module ActiveRecord
           :finder_sql, :counter_sql,
           :before_add, :after_add, :before_remove, :after_remove,
           :extend, :readonly,
-          :validate
+          :validate,

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class Tag
  has_many :taggings
end

class Tagging
  belongs_to :tag
  belongs_to :posts
  
  # uses a string 'flag' column but could be changed to a boolean important 
  # column later, hence the need to encapsulate!