导轨validates_ presense没有验证布尔？ [英] Rails validates_presense not validating on boolean?

问题描述

所以，我有一个表格，使用布尔选择男性或女性。当我使用只会验证：为布尔字段presense，它返回回来，性别不能为空！ Wehn我删除了验证部分，它让它通过为真或假到数据库。它不会离开它为零。我假设，因为使用im T / F，但我似乎无法找出为什么这是一个问题。这里是我的模型

 类访问＆LT; ActiveRecord的::基地
    验证：USER_ID，：FIRST_NAME，：姓氏，：出生日期，性别，
        presence：真
结束
 

和我对视场

 ＆LT;％= f.select：性别，
    ['男'，假]，['女'，真]，：价值=＆GT;假，
    标签：性别％GT;
 

解决方案

由于不能使用布尔字段presence验证。用包容来代替。看到这里的文档：<一href=\"http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html\">http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html

  

如果您想验证一个布尔字段（其中实际值是true和false）的presence，你会希望使用validates_inclusion_of：FIELD_NAME中：[真，假]）

So, I have a form, using a boolean to select male or female. When i use validates :presense for the boolean fields, it returns back, gender cannot be blank! Wehn I remove the validates portion, it lets it pass through as true or false into the DB. It doesn't leave it nil. I'm assuming this is an issue because im using t/f but I can't seem to figure out why. Here is my model

class Visit < ActiveRecord::Base
    validates :user_id, :first_name, :last_name, :birthdate, :gender, 
        presence: true
end

And my view for the field

<%= f.select :gender, 
    [['Male',false],['Female',true]], :value => false,
    label: "Gender" %>

解决方案

Because you can't use the presence validation on boolean fields. Use inclusion instead. See the documentation here: http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html

If you want to validate the presence of a boolean field (where the real values are true and false), you will want to use validates_inclusion_of :field_name, in: [true, false].)

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