def update_all(updates, conditions = nil, options = {})
sql = "UPDATE #{quoted_table_name} SET #{sanitize_sql_for_assignment(updates)} "
scope = scope(:find)
select_sql = ""
add_conditions!(select_sql, conditions, scope)
if options.has_key?(:limit) || (scope && scope[:limit])
add_order!(select_sql, options[:order], scope)
add_limit!(select_sql, options, scope)
sql.concat(connection.limited_update_conditions(select_sql, quoted_table_name, connection.quote_column_name(primary_key)))
else
add_order!(select_sql, options[:order], nil)
sql.concat(select_sql)
end
connection.update(sql, "#{name} Update")
end