轨道4活动记录验证 - 有条件地验证了4个属性presence如果至少有一个是同时允许无以present present [英] Rails 4 active record validation - conditionally validate presence of 4 attributes if at least one is present while allowing none to be present

问题描述

我有10个属性的一种形式。

其中我有4个属性，我需要办理什么我称之为互惠条件presence活动记录验证。

我要那个

• （A）如果一个人至少是present，那么其他3必须是present
• （B）仍允许无以present（如果其他3是空白的，那么第四个拥有可为空右）

下面是四个属性：

• 在地址行
• 拉链code
• 状态
• 国家

这意味着如果用户填写其中之一则所有其他需要成为present。但是，如果所有的都是空白，它的确定。

到目前为止，我只能够管理强制执行（A）。但我不执行（B）。

事实上，当我试图把allow_blank：真正的上的4个属性验证，那么它打破（A）之一，因为在那之后，它并不能保证，如果在属性为present，其他人必须是为好。

如何做到这一点？

下面是我目前的code

规格/型号/使用者

 验证：地址行，
              presence：的确，如果：pa_subelements_mutual_ presence？
              长度：{最大：100，
                        最低：3}
  验证：拉链code，
              presence：的确，如果：pa_subelements_mutual_ presence？
              长度：{最大值：20，
                        最低：4}
  验证：状态，
              presence：的确，如果：pa_subelements_mutual_ presence？
  验证：国家，
              presence：的确，如果：pa_subelements_mutual_ presence？
              长度：{最大值：50}

私人
 高清pa_subelements_mutual_ presence？ ＃方法来帮助验证集上相互依存为presence邮政地址
      拉姆达{self.address_line_1。present？ } ||
      拉姆达{self.zip code，present？ } ||
      拉姆达{self.state。present？ } ||
      拉姆达{self.country。present？ }
    结束
 

解决方案

在我看来，它是所有四个或没有。没有测试，但这应该工作。

 验证：all_or_none

私人
    高清all_or_none
        错误[：基地]＆LT;＆LT; 全有或全无，纨绔子弟，除非
            （address_line_1.blank＆安培;？＆安培;拉链code.blank和放大器;？＆安培; state.blank和放大器;＆放大器; country.blank？）||
            （address_line_1.blank和放大器;！？＆放大器;！拉链code.blank和放大器;？＆安培;！state.blank和放大器;？＆安培;！country.blank？）
    结束
 

all_or_none 要么如果四个字段为空或者其中没有一个是真的。

I have a form with 10 attributes.

Among them I have 4 attributes which I need to apply what I'd call a"mutually conditional presence" Active Record validation.

I want that

• (A) if one at least is present, then the other 3 must be present
• (B) still allow none to be present (if the other 3 are blank, then the fourth has the right be be blank)

Here are the four attributes:

• address_line_1
• zipcode
• state
• country

It means that if the user fills ONE of them then ALL the others have to be present. But if all are blank, it's ok.

So far I have only be able to manage to enforce (A). But I fail to implement (B).

Indeed when i try putting allow_blank: true on one of the 4 attributes validates, then it breaks (A) , as after that, it does not ensure that if on of the attributes is present, the others must be as well.

How to do this?

Here is my current code

spec/models/users

validates :address_line_1,
              presence: true, if: :pa_subelements_mutual_presence?
              length: { maximum: 100,
                        minimum: 3 }
  validates :zipcode, 
              presence: true, if: :pa_subelements_mutual_presence?,
              length: { maximum: 20,
                        minimum: 4} 
  validates :state, 
              presence: true, if: :pa_subelements_mutual_presence?,                  
  validates :country, 
              presence: true, if: :pa_subelements_mutual_presence?,            
              length: { maximum: 50} 

private
 def pa_subelements_mutual_presence? # method to help set validates on mutually dependent for presence for postal address
      lambda { self.address_line_1.present? }  ||
      lambda { self.zipcode.present? }         ||
      lambda { self.state.present? }         ||
      lambda { self.country.present? }
    end

解决方案

It seems to me, it has to be all four or none of them. Not tested, but this should work.

validate :all_or_none

private
    def all_or_none
        errors[:base] << "all or nothing, dude" unless
            (address_line_1.blank? && zipcode.blank? && state.blank? && country.blank?) ||
            (!address_line_1.blank? && !zipcode.blank? && !state.blank? && !country.blank?)
    end

all_or_none will either be true if all four fields are blank or none of them is.

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