Question

我在rails 2中工作，我想执行Query

PunchingInformation.all(
  :select => "users.id, login, firstname, lastname, 
    sec_to_time(avg(time_to_sec(punching_informations.punch_in_time))) as 'avg_pit',
    sec_to_time(avg(time_to_sec(punching_informations.punch_out_time))) as 'avg_pot'",
  :joins => :user,
  :group => "users.id",
  :conditions => { 
    "punching_informations.date between '#{start_date}' and '#{end_date}'", 
    ["punching_informations.user_id IN (?)", employees.map { |v| v.to_i } ]
  }
)

但它总是返回错误，如

Mysql ::错误：'where子句'中'2012-09-01'和'2012-09-25'之间的未知列'punching_informations.date：SELECT users.id，login，firstname，lastname，sec_to_time（ avg（time_to_sec（punching_informations.punch_in_time）））为'avg_pit'， sec_to_time（avg（time_to_sec（punching_informations.punch_out_time）））为'avg_pot'FRN punching_informations INNER JOIN users ON users。id = punching_informations。user_id AND（{{1 } {。{1}} ='用户'或users。type ='AnonymousUser'）WHERE（users。type IN（'punching_informations.user_id IN（？）'，'--- \ n- 28 \ n- 90 \ n'））GROUP BY users.id

需要你的帮助。

Answer 1

有点不清楚你的意思（你有阵列，但是像花键一样用大括号{}），但似乎ruby将第一个字符串（"punching_informations.date between '#{start_date}' and '#{end_date}'"）视为一列，而第二个数组，作为期望值的数组，从而使无效的IN条件。

如果重写为

，也许可行

:conditions => { 
   [ "(punching_informations.date between '#{start_date}' AND '#{end_date}') AND punching_informations.user_id IN (?)", employees.map { |v| v.to_i } ]
 }

甚至更好

:conditions => { 
   [ "(punching_informations.date between ? AND ?) AND punching_informations.user_id IN (?)", start_date, end_date, employees.map { |v| v.to_i } ]
 }

Answer 2

在select

中添加punching_informations.date和punching_informations.user_id

：select =＆gt; “punching_informations.date，punching_informations.user_id，users.id，....

IN子句：rails中的条件

2 个答案: