以下是我的模型,为了便于阅读,我剪了一些代码:
class Meeting < ActiveRecord::Base
def Joiners
# Never mind , this is a complex sql, i think you do not need to read it.
Joiners = Ploy.connection.select_all("SELECT count(users.id) as joiner FROM `ploys` INNER JOIN `participants` ON `participants`.`ploy_id` = `ploys`.`id` INNER JOIN `users` ON `users`.`id` = `participants`.`user_id` where `participants`.`ploy_id`= #{self.id}")
Joiners.rows[0][0]
end
def as_json(options={})
super(methods: :Joiners)
end
如果我使用
render json: @Meeting
它将使用 Joiners 属性呈现JSON。
{
"Meeting":{
...
"Joiners":15,
...
}
"Meeting":{
...
"Joiners":13,
...
}
}
所以:
我如何按加入者排序?
由于
答案 0 :(得分:0)
您必须使用SQL ORDER BY
在查询结果中对其进行排序