ActiveAdmin：過濾方法而不是屬性？

Question

我有一個方法，在我的車型之一類似如下：

def current? 
    self.parent.start_date <= Time.zone.now.to_date && self.parent.end_date >= Time.zone.now.to_date && !self.archived 
end 

我想創建基於此方法的結果ActiveAdmin一個簡單的過濾器（一個簡單的選擇濾波器稱爲Current的選項Yes ，No，和Any），但我似乎無法弄清楚如何。

過濾模型方法而不是其中一個屬性的最佳方法是什麼？

Answer 1

ActiveAdmin.rb中的以下類方法將根據條件返回所有記錄，例如， ActiveAdmin.current("Yes")或ActiveAdmin.current("No")。

def self.current(inp = "Yes") # default inp is "Yes" 
    d = Time.zone.now.to_date 
    return case inp 
    # when inp == "Yes" it would return all the records with archived == false (won't return archived == nil) 
    # AND parents with start_date <= d and end_date >= d 
    when "Yes" 
       where(archived: false). 
       joins(:parent). 
       where("parents.start_date <= ? AND parents.end_date >= ?",d,d) 

    # when inp == "No" it would return all the records with archived == true (won't return archived == nil) 
    # AND parents with start_date > d OR end_date < d 
    when "No" 
       where(archived: true). 
       joins(:parent). 
       where("parents.start_date > ? OR parents.end_date < ?",d,d) 

    # when inp = "Any" return all records 
    when "Any" 
       scoped 

    # return all records if inp does not match any of the above options 
    else 
       scoped 
    end 

end