Question

我有两个型号......

models / Resident.rb ：has_many：leaves

models / leave.rb ：belongs_to：resident

现在我要验证的是在模型属性创建之前离开它们。

leave.rb 属性： start_date，end_date，destination

这是我的休假模式 ：

class Leave < ActiveRecord::Base
  belongs_to :resident
  validates :destination,presence:true
  validates :end_date,presence: true
  validates :start_date,presence: true
  before_create :check_correct_leave

  private

  def check_correct_leave

   if resident.hostel.hostel=='J'
     (self.end_date - self.start_date).to_i == 4 ||  (self.end_date - self.start_date).to_i == 5

   else
     errors.add(:start_date, "Leave are granted only 4 or 5 days")
   end

  end

end

我想要 check_correct_leave 方法来检查 - ＆gt;如果居民已经休假（存储在假期模型中），那个月（月份就是jan，feb等）那么它应该产生一个错误：

“你不能标记请假，因为你已经在本月标记了假期” 和模型不应该存储该离开。谢谢！

Answer 1

您可以添加其他验证方法，例如

validate :check_leaves_in_same_month


def check_leaves_in_same_month  
   if self.resident.leaves.where('start_date > ?', self.start_date.beginning_of_month).any? 
       errors.add("You can't mark leave cause you have already marked leave for this month")
   end
end

Answer 2

def has_leave_for_the_same_month?
  resident.leaves.any? do |other_leave|
    other_leave.start_date.month == leave.start_date.month
  end
end

errors.add(...) if has_leave_for_the_same_month?

#Active record验证::如何在Rails（custom_validations）中验证日期属性？

2 个答案: