Merge branch 'master' into nested_has_many_through

Conflicts:
	activerecord/lib/active_record/associations.rb
	activerecord/test/cases/associations/cascaded_eager_loading_test.rb

15 files changed, 113 insertions, 121 deletions

diff --git a/activerecord/lib/active_record.rb b/activerecord/lib/active_record.rb
index f692e5ac89..c80bce2849 100644
--- a/activerecord/lib/active_record.rb
+++ b/activerecord/lib/active_record.rb
@@ -33,12 +33,12 @@ require 'active_support/i18n'
 require 'active_model'
 require 'arel'
 
+require 'active_record/version'
+
 module ActiveRecord
   extend ActiveSupport::Autoload
 
   eager_autoload do
-    autoload :VERSION
-
     autoload :ActiveRecordError, 'active_record/errors'
     autoload :ConnectionNotEstablished, 'active_record/errors'
 
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index ff6be4ff19..78b3507dd9 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -423,7 +423,7 @@ module ActiveRecord #:nodoc:
     class << self # Class methods
       delegate :find, :first, :last, :all, :destroy, :destroy_all, :exists?, :delete, :delete_all, :update, :update_all, :to => :scoped
       delegate :find_each, :find_in_batches, :to => :scoped
-      delegate :select, :group, :order, :reorder, :limit, :offset, :joins, :where, :preload, :eager_load, :includes, :from, :lock, :readonly, :having, :create_with, :to => :scoped
+      delegate :select, :group, :order, :except, :limit, :offset, :joins, :where, :preload, :eager_load, :includes, :from, :lock, :readonly, :having, :create_with, :to => :scoped
       delegate :count, :average, :minimum, :maximum, :sum, :calculate, :to => :scoped
 
       # Executes a custom SQL query against your database and returns all the results.  The results will
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
index 37e584a629..ca9314ec99 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
@@ -73,12 +73,7 @@ module ActiveRecord
         # The mutex used to synchronize pool access
         @connection_mutex = Monitor.new
         @queue = @connection_mutex.new_cond
-
-        # default 5 second timeout unless on ruby 1.9
-        @timeout =
-          if RUBY_VERSION < '1.9'
-            spec.config[:wait_timeout] || 5
-          end
+        @timeout = spec.config[:wait_timeout] || 5
 
         # default max pool size to 5
         @size = (spec.config[:pool] && spec.config[:pool].to_i) || 5
@@ -161,7 +156,6 @@ module ActiveRecord
         keys = @reserved_connections.keys - Thread.list.find_all { |t|
           t.alive?
         }.map { |thread| thread.object_id }
-
         keys.each do |key|
           checkin @reserved_connections[key]
           @reserved_connections.delete(key)
@@ -194,16 +188,18 @@ module ActiveRecord
                      checkout_new_connection
                    end
             return conn if conn
-            # No connections available; wait for one
-            if @queue.wait(@timeout)
+
+            @queue.wait(@timeout)
+
+            if(@checked_out.size < @connections.size)
               next
             else
-              # try looting dead threads
               clear_stale_cached_connections!
               if @size == @checked_out.size
                 raise ConnectionTimeoutError, "could not obtain a database connection#{" within #{@timeout} seconds" if @timeout}.  The max pool size is currently #{@size}; consider increasing it."
               end
             end
+
           end
         end
       end
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
index e2b3773a99..a7a12faac2 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
@@ -10,28 +10,31 @@ module ActiveRecord
         return value.quoted_id if value.respond_to?(:quoted_id)
 
         case value
-          when String, ActiveSupport::Multibyte::Chars
-            value = value.to_s
-            if column && column.type == :binary && column.class.respond_to?(:string_to_binary)
-              "'#{quote_string(column.class.string_to_binary(value))}'" # ' (for ruby-mode)
-            elsif column && [:integer, :float].include?(column.type)
-              value = column.type == :integer ? value.to_i : value.to_f
-              value.to_s
-            else
-              "'#{quote_string(value)}'" # ' (for ruby-mode)
-            end
-          when NilClass                 then "NULL"
-          when TrueClass                then (column && column.type == :integer ? '1' : quoted_true)
-          when FalseClass               then (column && column.type == :integer ? '0' : quoted_false)
-          when Float, Fixnum, Bignum    then value.to_s
-          # BigDecimals need to be output in a non-normalized form and quoted.
-          when BigDecimal               then value.to_s('F')
+        when String, ActiveSupport::Multibyte::Chars
+          value = value.to_s
+          return "'#{quote_string(value)}'" unless column
+
+          case column.type
+          when :binary then "'#{quote_string(column.string_to_binary(value))}'"
+          when :integer then value.to_i.to_s
+          when :float then value.to_f.to_s
+          else
+            "'#{quote_string(value)}'"
+          end
+
+        when true, false
+          if column && column.type == :integer
+            value ? '1' : '0'
           else
-            if value.acts_like?(:date) || value.acts_like?(:time)
-              "'#{quoted_date(value)}'"
-            else
-              "'#{quote_string(value.to_s)}'"
-            end
+            value ? quoted_true : quoted_false
+          end
+          # BigDecimals need to be put in a non-normalized form and quoted.
+        when nil        then "NULL"
+        when BigDecimal then value.to_s('F')
+        when Numeric    then value.to_s
+        when Date, Time then "'#{quoted_date(value)}'"
+        else
+          "'#{quote_string(value.to_s)}'"
         end
       end
 
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 6480aeb171..60ccf9edf3 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -114,6 +114,11 @@ module ActiveRecord
         type_cast(default)
       end
 
+      # Used to convert from Strings to BLOBs
+      def string_to_binary(value)
+        self.class.string_to_binary(value)
+      end
+
       class << self
         # Used to convert from Strings to BLOBs
         def string_to_binary(value)
@@ -268,6 +273,10 @@ module ActiveRecord
     # for generating a number of table creation or table changing SQL statements.
     class ColumnDefinition < Struct.new(:base, :name, :type, :limit, :precision, :scale, :default, :null) #:nodoc:
 
+      def string_to_binary(value)
+        value
+      end
+
       def sql_type
         base.type_to_sql(type.to_sym, limit, precision, scale) rescue type
       end
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index e7f7b37b27..a4b336dfaf 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -132,7 +132,7 @@ module ActiveRecord
       cattr_accessor :emulate_booleans
       self.emulate_booleans = true
 
-      ADAPTER_NAME = 'MySQL'.freeze
+      ADAPTER_NAME = 'MySQL'
 
       LOST_CONNECTION_ERROR_MESSAGES = [
         "Server shutdown in progress",
@@ -140,10 +140,10 @@ module ActiveRecord
         "Lost connection to MySQL server during query",
         "MySQL server has gone away" ]
 
-      QUOTED_TRUE, QUOTED_FALSE = '1'.freeze, '0'.freeze
+      QUOTED_TRUE, QUOTED_FALSE = '1', '0'
 
       NATIVE_DATABASE_TYPES = {
-        :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY".freeze,
+        :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY",
         :string      => { :name => "varchar", :limit => 255 },
         :text        => { :name => "text" },
         :integer     => { :name => "int", :limit => 4 },
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 5f14284615..dce9e99d27 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -180,8 +180,6 @@ module ActiveRecord
     #   <encoding></tt> call on the connection.
     # * <tt>:min_messages</tt> - An optional client min messages that is used in a
     #   <tt>SET client_min_messages TO <min_messages></tt> call on the connection.
-    # * <tt>:allow_concurrency</tt> - If true, use async query methods so Ruby threads don't deadlock;
-    #   otherwise, use blocking query methods.
     class PostgreSQLAdapter < AbstractAdapter
       class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition
         def xml(*args)
@@ -930,7 +928,7 @@ module ActiveRecord
           PGconn.translate_results = false if PGconn.respond_to?(:translate_results=)
 
           # Ignore async_exec and async_query when using postgres-pr.
-          @async = @config[:allow_concurrency] && @connection.respond_to?(:async_exec)
+          @async = @connection.respond_to?(:async_exec)
 
           # Money type has a fixed precision of 10 in PostgreSQL 8.2 and below, and as of
           # PostgreSQL 8.3 it has a fixed precision of 19. PostgreSQLColumn.extract_precision
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 9ac18f9939..a4c09b654a 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -384,23 +384,32 @@ module ActiveRecord
         end
       end
 
-      def copy(destination, sources)
+      def copy(destination, sources, options = {})
         copied = []
 
-        sources.each do |scope, path|
-          destination_migrations = ActiveRecord::Migrator.migrations(destination)
+        destination_migrations = ActiveRecord::Migrator.migrations(destination)
+        last = destination_migrations.last
+        sources.each do |name, path|
           source_migrations = ActiveRecord::Migrator.migrations(path)
-          last = destination_migrations.last
 
           source_migrations.each do |migration|
-            next if destination_migrations.any? { |m| m.name == migration.name && m.scope == scope.to_s }
+            source = File.read(migration.filename)
+            source = "# This migration comes from #{name} (originally #{migration.version})\n#{source}"
+
+            if duplicate = destination_migrations.detect { |m| m.name == migration.name }
+              options[:on_skip].call(name, migration) if File.read(duplicate.filename) != source && options[:on_skip]
+              next
+            end
 
             migration.version = next_migration_number(last ? last.version + 1 : 0).to_i
+            new_path = File.join(destination, "#{migration.version}_#{migration.name.underscore}.rb")
+            old_path, migration.filename = migration.filename, new_path
             last = migration
 
-            new_path = File.join(destination, "#{migration.version}_#{migration.name.underscore}.#{scope}.rb")
-            FileUtils.cp(migration.filename, new_path)
-            copied << new_path
+            FileUtils.cp(old_path, migration.filename)
+            copied << migration
+            options[:on_copy].call(name, migration, old_path) if options[:on_copy]
+            destination_migrations << migration
           end
         end
 
@@ -419,13 +428,17 @@ module ActiveRecord
 
   # MigrationProxy is used to defer loading of the actual migration classes
   # until they are needed
-  class MigrationProxy < Struct.new(:name, :version, :filename, :scope)
+  class MigrationProxy < Struct.new(:name, :version, :filename)
 
-    def initialize(name, version, filename, scope)
+    def initialize(name, version, filename)
       super
       @migration = nil
     end
 
+    def basename
+      File.basename(filename)
+    end
+
     delegate :migrate, :announce, :write, :to=>:migration
 
     private
@@ -510,18 +523,18 @@ module ActiveRecord
         seen = Hash.new false
 
         migrations = files.map do |file|
-          version, name, scope = file.scan(/([0-9]+)_([_a-z0-9]*)\.?([_a-z0-9]*)?.rb/).first
+          version, name = file.scan(/([0-9]+)_([_a-z0-9]*).rb/).first
 
           raise IllegalMigrationNameError.new(file) unless version
           version = version.to_i
           name = name.camelize
 
           raise DuplicateMigrationVersionError.new(version) if seen[version]
-          raise DuplicateMigrationNameError.new(name) if seen[[name, scope]]
+          raise DuplicateMigrationNameError.new(name) if seen[name]
 
-          seen[version] = seen[[name, scope]] = true
+          seen[version] = seen[name] = true
 
-          MigrationProxy.new(name, version, file, scope)
+          MigrationProxy.new(name, version, file)
         end
 
         migrations.sort_by(&:version)
diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake
index 58c705c8b2..1fbc8a1d32 100644
--- a/activerecord/lib/active_record/railties/databases.rake
+++ b/activerecord/lib/active_record/railties/databases.rake
@@ -2,28 +2,7 @@ namespace :db do
   task :load_config => :rails_env do
     require 'active_record'
     ActiveRecord::Base.configurations = Rails.application.config.database_configuration
-    ActiveRecord::Migrator.migrations_path = Rails.application.config.paths.db.migrate.to_a.first
-  end
-
-  task :copy_migrations => :load_config do
-    to_load = ENV["FROM"].blank? ? :all : ENV["FROM"].split(",").map {|n| n.strip }
-    railties = {}
-    Rails.application.railties.all do |railtie|
-      next unless to_load == :all || to_load.include?(railtie.railtie_name)
-
-      if railtie.config.respond_to?(:paths) && railtie.config.paths.db
-        railties[railtie.railtie_name] = railtie.config.paths.db.migrate.to_a.first
-      end
-    end
-
-    copied = ActiveRecord::Migration.copy(ActiveRecord::Migrator.migrations_path, railties)
-
-    if copied.blank?
-      puts "No migrations were copied, project is up to date."
-    else
-      puts "The following migrations were copied:"
-      puts copied.map{ |path| File.basename(path) }.join("\n")
-    end
+    ActiveRecord::Migrator.migrations_path = Rails.application.paths["db/migrate"].first
   end
 
   namespace :create do
@@ -501,8 +480,31 @@ namespace :db do
 end
 
 namespace :railties do
-  desc "Copies missing migrations from Railties (e.g. plugins, engines). You can specify Railties to use with FROM=railtie1,railtie2"
-  task :copy_migrations => 'db:copy_migrations'
+  namespace :install do
+    # desc "Copies missing migrations from Railties (e.g. plugins, engines). You can specify Railties to use with FROM=railtie1,railtie2"
+    task :migrations => :"db:load_config" do
+      to_load = ENV["FROM"].blank? ? :all : ENV["FROM"].split(",").map {|n| n.strip }
+      railties = {}
+      Rails.application.railties.all do |railtie|
+        next unless to_load == :all || to_load.include?(railtie.railtie_name)
+
+        if railtie.respond_to?(:paths) && (path = railtie.paths["db/migrate"].first)
+          railties[railtie.railtie_name] = path
+        end
+      end
+
+      on_skip = Proc.new do |name, migration|
+        puts "NOTE: Migration #{migration.basename} from #{name} has been skipped. Migration with the same name already exists."
+      end
+
+      on_copy = Proc.new do |name, migration, old_path|
+        puts "Copied migration #{migration.basename} from #{name}"
+      end
+
+      ActiveRecord::Migration.copy( ActiveRecord::Migrator.migrations_path, railties,
+                                    :on_skip => on_skip, :on_copy => on_copy)
+    end
+  end
 end
 
 task 'test:prepare' => 'db:test:prepare'
diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index d79ef78b4d..6bf698fe97 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -177,7 +177,7 @@ module ActiveRecord
       distinct = options[:distinct] || distinct
 
       if @group_values.any?
-        execute_grouped_calculation(operation, column_name)
+        execute_grouped_calculation(operation, column_name, distinct)
       else
         execute_simple_calculation(operation, column_name, distinct)
       end
@@ -191,19 +191,23 @@ module ActiveRecord
       end
     end
 
+    def operation_over_aggregate_column(column, operation, distinct)
+      operation == 'count' ? column.count(distinct) : column.send(operation)
+    end
+
     def execute_simple_calculation(operation, column_name, distinct) #:nodoc:
       column = aggregate_column(column_name)
 
       # Postgresql doesn't like ORDER BY when there are no GROUP BY
       relation = except(:order)
-      select_value = operation == 'count' ? column.count(distinct) : column.send(operation)
+      select_value = operation_over_aggregate_column(column, operation, distinct)
 
       relation.select_values = [select_value]
 
       type_cast_calculated_value(@klass.connection.select_value(relation.to_sql), column_for(column_name), operation)
     end
 
-    def execute_grouped_calculation(operation, column_name) #:nodoc:
+    def execute_grouped_calculation(operation, column_name, distinct) #:nodoc:
       group_attr      = @group_values.first
       association     = @klass.reflect_on_association(group_attr.to_sym)
       associated      = association && association.macro == :belongs_to # only count belongs_to associations
@@ -221,7 +225,7 @@ module ActiveRecord
 
       relation = except(:group).group(group)
       relation.select_values = [
-        aggregate_column(column_name).send(operation).as(aggregate_alias),
+        operation_over_aggregate_column(aggregate_column(column_name), operation, distinct).as(aggregate_alias),
         "#{group_field} AS #{group_alias}"
       ]
 
@@ -273,7 +277,7 @@ module ActiveRecord
           else type_cast_using_column(value, column)
         end
       else
-        value
+        type_cast_using_column(value, column)
       end
     end
 
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index 5034caf084..b763e22ec6 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -291,8 +291,8 @@ module ActiveRecord
       record = where(primary_key.eq(id)).first
 
       unless record
-        conditions = arel.wheres.map { |x| x.value }.join(', ')
-        conditions = " [WHERE #{conditions}]" if conditions.present?
+        conditions = arel.where_sql
+        conditions = " [#{conditions}]" if conditions
         raise RecordNotFound, "Couldn't find #{@klass.name} with ID=#{id}#{conditions}"
       end
 
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index f314ff861f..59ce76ea42 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -6,7 +6,7 @@ module ActiveRecord
     extend ActiveSupport::Concern
 
     attr_accessor :includes_values, :eager_load_values, :preload_values,
-                  :select_values, :group_values, :order_values, :reorder_flag, :joins_values, :where_values, :having_values,
+                  :select_values, :group_values, :order_values, :joins_values, :where_values, :having_values,
                   :limit_value, :offset_value, :lock_value, :readonly_value, :create_with_value, :from_value
 
     def includes(*args)
@@ -53,15 +53,6 @@ module ActiveRecord
       relation
     end
 
-    def reorder(*args)
-      relation = clone
-      unless args.blank?
-        relation.order_values = args
-        relation.reorder_flag = true
-      end
-      relation
-    end
-
     def joins(*args)
       relation = clone
 
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index 9ecdb99bee..dcddc3dac4 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -19,20 +19,11 @@ module ActiveRecord
         end
       end
 
-      (Relation::MULTI_VALUE_METHODS - [:joins, :where, :order]).each do |method|
+      (Relation::MULTI_VALUE_METHODS - [:joins, :where]).each do |method|
         value = r.send(:"#{method}_values")
         merged_relation.send(:"#{method}_values=", merged_relation.send(:"#{method}_values") + value) if value.present?
       end
 
-      order_value = r.order_values
-      if order_value.present?
-        if r.reorder_flag
-          merged_relation.order_values = order_value
-        else
-          merged_relation.order_values = merged_relation.order_values + order_value
-        end
-      end
-
       merged_relation = merged_relation.joins(r.joins_values)
 
       merged_wheres = @where_values
diff --git a/activerecord/lib/active_record/serialization.rb b/activerecord/lib/active_record/serialization.rb
index 398eb1534a..2bde06f562 100644
--- a/activerecord/lib/active_record/serialization.rb
+++ b/activerecord/lib/active_record/serialization.rb
@@ -22,7 +22,7 @@ module ActiveRecord #:nodoc:
     end
 
     private
-      # Add associations specified via the <tt>:includes</tt> option.
+      # Add associations specified via the <tt>:include</tt> option.
       #
       # Expects a block that takes as arguments:
       #   +association+ - name of the association
diff --git a/activerecord/lib/active_record/test_case.rb b/activerecord/lib/active_record/test_case.rb
index 31b5a8651b..014a900c71 100644
--- a/activerecord/lib/active_record/test_case.rb
+++ b/activerecord/lib/active_record/test_case.rb
@@ -36,21 +36,6 @@ module ActiveRecord
       assert_queries(0, &block)
     end
 
-    def self.use_concurrent_connections
-      setup :connection_allow_concurrency_setup
-      teardown :connection_allow_concurrency_teardown
-    end
-
-    def connection_allow_concurrency_setup
-      @connection = ActiveRecord::Base.remove_connection
-      ActiveRecord::Base.establish_connection(@connection.merge({:allow_concurrency => true}))
-    end
-
-    def connection_allow_concurrency_teardown
-      ActiveRecord::Base.clear_all_connections!
-      ActiveRecord::Base.establish_connection(@connection)
-    end
-
     def with_kcode(kcode)
       if RUBY_VERSION < '1.9'
         orig_kcode, $KCODE = $KCODE, kcode