我的申请涉及员工的缺勤记录。
我需要确保每条记录的开始和结束日期不重叠。
因此,例如,如果我输入了今天开始并明天结束的缺席记录,则不应该以任何方式在该日期范围内输入另一个记录。所以我不能制作一个在今天前一天开始,然后在后天或之后的任何日期结束。
简而言之,我需要使日期范围独一无二。
实现这一目标的最佳方法是什么?
模型类中涉及遍历所有记录的自定义验证器需要很长时间才能完成,而且我没有找到任何解决此问题的宝石。我也没有找到任何简单的方法来确定模型中的唯一性。我很难过:/
谢谢你的时间!
编辑:
class Absence < ActiveRecord::Base
attr_accessible :date, :date_ended, :status, :reason, :form, :user_id, :tempuser, :company_id
belongs_to :user
default_scope { where(company_id: Company.current_id) }
validates :date, :date_ended, :status, :reason, :form, :user_id, presence: true
validates_numericality_of :user_id, :only_integer => true, :message => "can only be whole number."
end
答案 0 :(得分:18)
我用这些:
scope :overlaps, ->(start_date, end_date) do
where "(DATEDIFF(start_date, ?) * DATEDIFF(?, end_date)) >= 0", end_date, start_date
end
def overlaps?
overlaps.exists?
end
# Others are models to be compared with your current model
# you can get these with a where for example
def overlaps
siblings.overlaps start_date, end_date
end
validate :not_overlap
def not_overlap
errors.add(:key, 'message') if overlaps?
end
# -1 is when you have a nil id, so you will get all persisted user absences
# I think -1 could be omitted, but did not work for me, as far as I remember
def siblings
user.absences.where('id != ?', id || -1)
end
来源:https://makandracards.com/makandra/984-test-if-two-date-ranges-overlap-in-ruby-or-rails
答案 1 :(得分:8)
作为对已接受答案的修改,这里是一个重叠范围,适用于不理解DATEDIFF的数据库
scope :overlaps, ->(start_date, end_date) do
where "((start_date <= ?) and (end_date >= ?))", end_date, start_date
end
的解决方案
答案 2 :(得分:8)
使用gem validates_overlap
。
gem 'validates_overlap'
例如,如果您的模型名为Meeting
且start_date
和end_date
字段类型为date
,则可以轻松验证它们是否重叠。
class Meeting < ActiveRecord::Base
validates :start_date, :end_date, overlap: true
end
另一个更现实的例子,比如Meeting
belongs_to a User
,您可以将其范围化,因此它只会验证特定用户的会议。
class Meeting < ActiveRecord::Base
belongs_to User
validates :start_date, :end_date, overlap: { scope: 'user_id',
message_content: 'overlaps with Users other meetings.' }
end
答案 3 :(得分:1)
有一个名为validates_overlap的宝石,可让您轻松验证日期范围重叠。您还可以在验证中使用范围。
答案 4 :(得分:1)
虽然juanpastas解决方案是正确的,但它对创建记录有效,但可能导致对更新的错误否定验证。
如果您需要编辑现有记录,请说范围是2014-03-13..2014-06-12并且您想将其缩小到2014-03-13..2014-04-12,你' ll会出现重叠错误,因为它正在检查AGAINST本身。
def siblings
Absence_users.where('user_id = ? AND id != ?', user_id, self)
end
将消除这个缺点。 (Dave T的加法也应该遵循,与DB无关。)