Merge commit 'mainstream/master'

Conflicts:
	actionpack/lib/action_controller/base/mime_responds.rb

9 files changed, 56 insertions, 19 deletions

diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 41c0394763..eb80f5e8d2 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1668,7 +1668,7 @@ module ActiveRecord
 
         def tables_in_string(string)
           return [] if string.blank?
-          string.scan(/([\.a-zA-Z_]+).?\./).flatten
+          string.scan(/([a-zA-Z_][\.\w]+).?\./).flatten
         end
 
         def tables_in_hash(hash)
diff --git a/activerecord/lib/active_record/associations/association_collection.rb b/activerecord/lib/active_record/associations/association_collection.rb
index 1e2313ab62..c3e5bd8575 100644
--- a/activerecord/lib/active_record/associations/association_collection.rb
+++ b/activerecord/lib/active_record/associations/association_collection.rb
@@ -302,6 +302,15 @@ module ActiveRecord
         end
       end
 
+      # Returns true if the collection has more than 1 record. Equivalent to collection.size > 1.
+      def many?
+        if block_given?
+          method_missing(:many?) { |*block_args| yield(*block_args) }
+        else
+          size > 1
+        end
+      end
+
       def uniq(collection = self)
         seen = Set.new
         collection.inject([]) do |kept, record|
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index 2dca84b911..e8dbae9011 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -17,6 +17,13 @@ module ActiveRecord
         end
       end
 
+      def destroy(*records)
+        transaction do
+          delete_records(flatten_deeper(records))
+          super
+        end
+      end
+
       # Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn't been loaded and
       # calling collection.size if it has. If it's more likely than not that the collection does have a size larger than zero,
       # and you need to fetch that collection afterwards, it'll take one fewer SELECT query if you use #length.
diff --git a/activerecord/lib/active_record/associations/has_one_through_association.rb b/activerecord/lib/active_record/associations/has_one_through_association.rb
index 8073ebaf9f..d93c8e7852 100644
--- a/activerecord/lib/active_record/associations/has_one_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_one_through_association.rb
@@ -1,31 +1,31 @@
 module ActiveRecord
   module Associations
     class HasOneThroughAssociation < HasManyThroughAssociation
-      
+
       def create_through_record(new_value) #nodoc:
         klass = @reflection.through_reflection.klass
 
         current_object = @owner.send(@reflection.through_reflection.name)
-        
+
         if current_object
-          current_object.update_attributes(construct_join_attributes(new_value))
+          new_value ? current_object.update_attributes(construct_join_attributes(new_value)) : current_object.destroy
         else
-          @owner.send(@reflection.through_reflection.name,  klass.send(:create, construct_join_attributes(new_value)))
+          @owner.send(@reflection.through_reflection.name,  klass.send(:create, construct_join_attributes(new_value))) if new_value
         end
       end
-      
+
     private
       def find(*args)
         super(args.merge(:limit => 1))
       end
-    
+
       def find_target
         super.first
       end
 
       def reset_target!
         @target = nil
-      end        
-    end        
+      end
+    end
   end
 end
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 9014bfdfa6..36a88494f2 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1,6 +1,7 @@
 require 'yaml'
 require 'set'
 require 'active_support/dependencies'
+require 'active_support/time'
 require 'active_support/core_ext/class/attribute_accessors'
 require 'active_support/core_ext/class/delegating_attributes'
 require 'active_support/core_ext/class/inheritable_attributes'
@@ -9,7 +10,7 @@ require 'active_support/core_ext/hash/deep_merge'
 require 'active_support/core_ext/hash/indifferent_access'
 require 'active_support/core_ext/hash/slice'
 require 'active_support/core_ext/string/behavior'
-require 'active_support/core/time'
+require 'active_support/core_ext/symbol'
 
 module ActiveRecord #:nodoc:
   # Generic Active Record exception class.
@@ -1541,12 +1542,12 @@ module ActiveRecord #:nodoc:
         end
 
         def reverse_sql_order(order_query)
-          reversed_query = order_query.to_s.split(/,/).each { |s|
+          order_query.to_s.split(/,/).each { |s|
             if s.match(/\s(asc|ASC)$/)
               s.gsub!(/\s(asc|ASC)$/, ' DESC')
             elsif s.match(/\s(desc|DESC)$/)
               s.gsub!(/\s(desc|DESC)$/, ' ASC')
-            elsif !s.match(/\s(asc|ASC|desc|DESC)$/)
+            else
               s.concat(' DESC')
             end
           }.join(',')
@@ -2176,7 +2177,7 @@ module ActiveRecord #:nodoc:
         #     default_scope :order => 'last_name, first_name'
         #   end
         def default_scope(options = {})
-          self.default_scoping << { :find => options, :create => (options.is_a?(Hash) && options.has_key?(:conditions)) ? options[:conditions] : {} }
+          self.default_scoping << { :find => options, :create => options[:conditions].is_a?(Hash) ? options[:conditions] : {} }
         end
 
         # Test whether the given method and optional key are scoped.
diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index cc3c4ece47..3eb547f713 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -1,6 +1,7 @@
 require 'erb'
 require 'yaml'
 require 'csv'
+require 'zlib'
 require 'active_support/dependencies'
 require 'active_support/test_case'
 require 'active_support/core_ext/logger'
@@ -434,6 +435,7 @@ end
 # Any fixture labeled "DEFAULTS" is safely ignored.
 
 class Fixtures < (RUBY_VERSION < '1.9' ? YAML::Omap : Hash)
+  MAX_ID = 2 ** 31 - 1
   DEFAULT_FILTER_RE = /\.ya?ml$/
 
   @@all_cached_fixtures = {}
@@ -525,11 +527,10 @@ class Fixtures < (RUBY_VERSION < '1.9' ? YAML::Omap : Hash)
     cached_fixtures(connection, table_names)
   end
 
-  # Returns a consistent identifier for +label+. This will always
-  # be a positive integer, and will always be the same for a given
-  # label, assuming the same OS, platform, and version of Ruby.
+  # Returns a consistent, platform-independent identifier for +label+.
+  # Identifiers are positive integers less than 2^32.
   def self.identify(label)
-    label.to_s.hash.abs
+    Zlib.crc32(label.to_s) % MAX_ID
   end
 
   attr_reader :table_name, :name
diff --git a/activerecord/lib/active_record/named_scope.rb b/activerecord/lib/active_record/named_scope.rb
index 07f98dc743..e7151a3d47 100644
--- a/activerecord/lib/active_record/named_scope.rb
+++ b/activerecord/lib/active_record/named_scope.rb
@@ -109,7 +109,7 @@ module ActiveRecord
 
     class Scope
       attr_reader :proxy_scope, :proxy_options, :current_scoped_methods_when_defined
-      NON_DELEGATE_METHODS = %w(nil? send object_id class extend find size count sum average maximum minimum paginate first last empty? any? respond_to?).to_set
+      NON_DELEGATE_METHODS = %w(nil? send object_id class extend find size count sum average maximum minimum paginate first last empty? any? many? respond_to?).to_set
       [].methods.each do |m|
         unless m =~ /^__/ || NON_DELEGATE_METHODS.include?(m.to_s)
           delegate m, :to => :proxy_found
@@ -168,6 +168,15 @@ module ActiveRecord
         end
       end
 
+      # Returns true if the named scope has more than 1 matching record.
+      def many?
+        if block_given?
+          proxy_found.many? { |*block_args| yield(*block_args) }
+        else
+          size > 1
+        end
+      end
+
       protected
       def proxy_found
         @found || load_found
diff --git a/activerecord/lib/active_record/session_store.rb b/activerecord/lib/active_record/session_store.rb
index 21471da419..9dda3361d8 100644
--- a/activerecord/lib/active_record/session_store.rb
+++ b/activerecord/lib/active_record/session_store.rb
@@ -295,7 +295,7 @@ module ActiveRecord
 
       def set_session(env, sid, session_data)
         Base.silence do
-          record = env[SESSION_RECORD_KEY] ||= find_session(sid)
+          record = get_session_model(env, sid)
           record.data = session_data
           return false unless record.save
 
@@ -309,6 +309,14 @@ module ActiveRecord
 
         return true
       end
+      
+      def get_session_model(env, sid)
+        if env[ENV_SESSION_OPTIONS_KEY][:id].nil?
+          env[SESSION_RECORD_KEY] = find_session(sid)
+        else
+          env[SESSION_RECORD_KEY] ||= find_session(sid)
+        end
+      end
 
       def find_session(id)
         @@session_class.find_by_session_id(id) ||
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index 236c9f36de..0532a06bf2 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/integer/even_odd'
+
 module ActiveRecord
   # Raised by <tt>save!</tt> and <tt>create!</tt> when the record is invalid.  Use the
   # +record+ method to retrieve the record which did not validate.