[英]# Active record validations : : How to validate date attributes in Rails(custom_validations)?
我有两个模特...
models / Resident.rb :has_many:叶子
models / leave.rb :belongs_to:常驻
现在,我要验证的内容将在离开模型属性创建之前开始。
Leave.rb 属性 :开始日期,结束日期,目的地
这是我的假期模型 :
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
我希望check_correct_leave方法也检查->如果居民已经有一个月的休假(存储在休假模型中)(月表示jan,feb等),那么它应该生成以下错误:
“您不能标记休假,因为您已经标记了本月休假”,并且模型不应存储该休假。 谢谢 !
您可以添加其他类似的验证方法
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
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?
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