fix url connections for sqlite3

activerecord/lib/active_record/connection_adapters/connection_specification.rb

@@ -69,11 +69,22 @@ def connection_url_to_hash(url) # :nodoc:
           config = URI.parse url
           adapter = config.scheme
           adapter = "postgresql" if adapter == "postgres"
+
+          database = if adapter == 'sqlite3'
+                       if '/:memory:' == config.path
+                         ':memory:'
+                       else
+                         config.path
+                       end
+                     else
+                       config.path.sub(%r{^/},"")
+                     end
+
           spec = { :adapter  => adapter,
                    :username => config.user,
                    :password => config.password,
                    :port     => config.port,
-                   :database => config.path.sub(%r{^/},""),
+                   :database => database,
                    :host     => config.host }
 
           spec.reject!{ |_,value| value.blank? }

activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb

@@ -1,6 +1,7 @@
 # encoding: utf-8
 require "cases/helper"
 require 'models/owner'
+require 'tempfile'
 
 module ActiveRecord
   module ConnectionAdapters
@@ -25,6 +26,27 @@ def setup
         ActiveSupport::Notifications.subscribe('sql.active_record', @subscriber)
       end
 
+      def test_connect_with_url
+        original_connection = ActiveRecord::Base.remove_connection
+        tf = Tempfile.open 'whatever'
+        url = "sqlite3://#{tf.path}"
+        ActiveRecord::Base.establish_connection(url)
+        assert ActiveRecord::Base.connection
+      ensure
+        tf.close
+        tf.unlink
+        ActiveRecord::Base.establish_connection(original_connection)
+      end
+
+      def test_connect_memory_with_url
+        original_connection = ActiveRecord::Base.remove_connection
+        url = "sqlite3:///:memory:"
+        ActiveRecord::Base.establish_connection(url)
+        assert ActiveRecord::Base.connection
+      ensure
+        ActiveRecord::Base.establish_connection(original_connection)
+      end
+
       def test_valid_column
         column = @conn.columns('items').find { |col| col.name == 'id' }
         assert @conn.valid_type?(column.type)