Ruby on Rails：命名作用域OR正在变为AND时，它变成SQL

Question

{ :conditions => ["#{"(visibility = #{Shared::PUBLIC}) || " if include_non_employee_public} (visibility IN (#{employee_privacy}) AND user_id IN (#{users}))"] } 

有我的条件为我命名的作用域。现在我已经尝试了两种||和OR在命名范围内，但控制台始终显示AND。

有什么想法？

Answer 1

{ :conditions => ["#{"(visibility = #{Shared::PUBLIC}) || " if include_non_employee_public} (visibility IN (#{employee_privacy}) AND user_id IN (#{users}))"] } 

这很混乱，试图逆向工程在这里尝试做什么。通常，尽管一个sql查询应该总是使用“OR”而不是“||”。 ||将只能在你的ruby代码中工作。另外，通常你应该使用？然后将值放在后面而不是使用字符串评估。这对于你看起来在这里使用的数组来说会更好。例如

{ :conditions => ["#{"(visibility = ?) || " if include_non_employee_public} (visibility IN (?) AND user_id IN (?))"], Shared::PUBLIC, employee_privacy, users] } 

好的，下一步就是要弄清楚你正在尝试做什么。我们假设include_non_employee_public为true。然后你会得到

{ :conditions => ["(visibility = ?) || (visibility IN (?) AND user_id IN (?))"], Shared::PUBLIC, employee_privacy, users] } 

让我们交换||为一个左右，它将工作在SQL：

{ :conditions => ["(visibility = ?) or (visibility IN (?) AND user_id IN (?))"], Shared::PUBLIC, employee_privacy, users] } 

这是你正在尝试做什么？这现在不会工作，因为在include_non_employee_public为false的情况下，您现在在参数列表的第二部分中有一个空闲值（Shared :: Public）。为了便于理解，我会将其分成if语句：

if include_non_employee_public 
    conditions = ["(visibility = ?) or (visibility IN (?) AND user_id IN (?))"], Shared::PUBLIC, employee_privacy, users] 
else 
    conditions = ["visibility IN (?) AND user_id IN (?)"], employee_privacy, users] 
end 

现在您可以在查询中说：conditions =>条件。