在rails上添加紅寶石查詢

Question

此方法從數據庫返回一些記錄。

def wall_record(ref_id,followers_record,pid,sd_pid) 
     @Wp_rec=Wallpost.select('Wp.id as Pid,Wp.*,Wi.id as Iid,Wi.imagename,Wv.videourl,U.firstname,U.username') 
     @Wp_rec=@Wp_rec.where('Wp.id > ? ', pid) if pid.present? # pid->PostId 
     @Wp_rec=@Wp_rec.where('Wp.id < ? ', sd_pid) if sd_pid.present? # sd_pid -> Scroll down 
     @Wp_rec=@Wp_rec.where('Wp.posted_by IN (?) ', followers_record) if followers_record.present? 
     @Wp_rec=@Wp_rec.joins('Wp INNER JOIN `epoker_wallimages` as Wi on Wi.wallpost_id = Wp.id') 
     @Wp_rec=@Wp_rec.joins('INNER JOIN `epoker_users` as U on U.id = Wp.user_id') 
     @Wp_rec=@Wp_rec.joins('INNER JOIN `epoker_wallvideos` as Wv on Wv.wallpost_id = Wp.id') 
     @Wp_rec=@Wp_rec.order('Wp.id DESC') if followers_record.present? 
     @Wp_rec=@Wp_rec.limit(5) #if followers_record.present? 
     end 

現在我想添加MySQL查詢 - >where((Wp.posted_by != 100000 AND post_status = 1) OR (Wp.posted_by = 10000 AND post_status in (1,2)))

我怎麼能做到這一點嗎？

Answer 1

這是很容易=）

只包括條件你想要什麼到報價：

where("(Wp.posted_by != 100000 AND post_status = 1) OR (Wp.posted_by = 10000 AND post_status in (1,2))") 

，你甚至可以通過引號內的任何PARAM你想

where("(Wp.posted_by != 100000 AND post_status = #{post_status}) OR (Wp.posted_by = #{posted_by} AND post_status in (#{post_statuses_array.join(',')}))") 

最後，你可以使用更多的軌道式方法

where("(Wp.posted_by ? != AND post_status = ?) OR (Wp.posted_by = ? AND post_status in (?))",100000, 1, 10000, [1,2]) 

而不是Wp模型，你必須通過真正的表名！（但據我可以看到它是你的表名..不是很方便，順便說一下）