implements ActiveRecord::Base.connection_config to be able to check the configuration of the current connection at runtime

activerecord/CHANGELOG

@@ -1,5 +1,8 @@
 *Rails 3.1.0 (unreleased)*
 
+* The configuration for the current database connection is now accessible via
+  ActiveRecord::Base.connection_config. [fxn]
+
 * limits and offsets are removed from COUNT queries unless both are supplied.
   For example:
 

activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb

@@ -89,6 +89,16 @@ module ActiveRecord
         retrieve_connection
       end
 
+      # Returns the configuration of the associated connection as a hash:
+      #
+      #  ActiveRecord::Base.connection_config
+      #  # => {:pool=>5, :timeout=>5000, :database=>"db/development.sqlite3", :adapter=>"sqlite3"}
+      #
+      # Please use only for reading.
+      def connection_config
+        connection_pool.spec.config
+      end
+
       def connection_pool
         connection_handler.retrieve_connection_pool(self)
       end

activerecord/test/cases/pooled_connections_test.rb

@@ -94,6 +94,11 @@ class PooledConnectionsTest < ActiveRecord::TestCase
     ActiveRecord::Base.connection_handler = old_handler
   end
 
+  def test_connection_config
+    ActiveRecord::Base.establish_connection(@connection)
+    assert_equal @connection, ActiveRecord::Base.connection_config
+  end
+
   def test_with_connection_nesting_safety
     ActiveRecord::Base.establish_connection(@connection.merge({:pool => 1, :wait_timeout => 0.1}))