1 files changed, 31 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index cbb6869e66..ff9de712bc 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -61,12 +61,30 @@ module ActiveRecord
       include MonitorMixin
       include ColumnDumper
 
+      SIMPLE_INT = /\A\d+\z/
+
       define_callbacks :checkout, :checkin
 
       attr_accessor :visitor, :pool
       attr_reader :schema_cache, :last_use, :in_use, :logger
       alias :in_use? :in_use
 
+      def self.type_cast_config_to_integer(config)
+        if config =~ SIMPLE_INT
+          config.to_i
+        else
+          config
+        end
+      end
+
+      def self.type_cast_config_to_boolean(config)
+        if config == "false"
+          false
+        else
+          config
+        end
+      end
+
       def initialize(connection, logger = nil, pool = nil) #:nodoc:
         super()
 
@@ -171,10 +189,22 @@ module ActiveRecord
         false
       end
 
+      # Does this adapter support database extensions? As of this writing only
+      # postgresql does.
+      def supports_extensions?
+        false
+      end
+
+      # A list of extensions, to be filled in by adapters that support them. At
+      # the moment only postgresql does.
+      def extensions
+        []
+      end
+
       # QUOTING ==================================================
 
       # Returns a bind substitution value given a +column+ and list of current
-      # +binds+
+      # +binds+.
       def substitute_at(column, index)
         Arel::Nodes::BindParam.new '?'
       end