Insert statement in Arel

arel.rb

require "active_record"

ActiveRecord::Base.establish_connection("postgres:///db")

insert          = Arel::Nodes::InsertStatement.new
insert.relation = Arel::Table.new(:movies)
insert.columns  = hash.keys.map { |k| Arel::Table.new(:movies)[k] }
insert.values   = Arel::Nodes::Values.new(hash.values, insert.columns)

ActiveRecord::Base.connection.execute(insert.to_sql)