SQL到RAILS3使用Active记录？

Question

任何人都可以帮我用rails activerecord query>来写这个

SELECT DISTINCT `merchants`.id FROM `merchants` 
  INNER JOIN `merchant_status_assignments` ON `merchants`.`id` = `merchant_status_assignments`.`merchant_id` 
  INNER JOIN `merchant_statuses` ON `merchant_statuses`.`id` = `merchant_status_assignments`.`merchant_status_id` 
  INNER JOIN `merchant_status_assignments` `merchant_status_assignments_merchants` ON `merchant_status_assignments_merchants`.`merchant_id` = `merchants`.`id` 
  LEFT OUTER JOIN `favourite_merchants` ON `favourite_merchants`.`merchant_id` = `merchants`.`id` AND `favourite_merchants`.`customer_id` = 11
  WHERE `merchants`.`status` = 1 AND `merchant_statuses`.`name` = 'new_merchant' 
    AND (merchants.site_id = 1)

Answer 1

我得到了答案

控制器

DEF new_list @merchants = Merchant.front_search（current_site.id，params）.includes（：favourite_merchant）.where（customer_id =＆gt; current_customer.id） END

模型

DEF self.front_search（site_id，params）商家= merchants.joins（：merchant_statuses，：merchant_status_assignments）.where（“merchant_statuses.name”=＆gt; params [：status]）。select（'DISTINCT merchants。*'） 结束