Question

我试图写一段时间的验证，这样一段时间就不能与另一段时间重叠。此时，我的周期范围为1-52（如第1-52周）。

如果期间为20-40，我会进行验证，如果新期间位于该范围内，则会出错。

但是如果周期是33-8，那么当另一个周期重叠时，它不会引发错误。

我该怎么做？

class Period < ApplicationRecord

 validate :start_week_cannot_overlap_period
 validate :finish_week_cannot_overlap_period
 validates :start_week, inclusion: { in: (1..52), message: '%<value>s must be a valid week number' }
 validates :finish_week, inclusion: { in: (1..52), message: '%<value>s must be a valid week number' }

 scope :overlapping, ->(integer) do
  where 'start_week <= :integer and finish_week >= :integer', integer: integer
 end

 def start_week_cannot_overlap_period
   return unless Period.overlapping(start_week).any?
   errors.add(:start_week, 'cannot be in another Period')
 end

 def finish_week_cannot_overlap_period
   return unless Period.overlapping(finish_week).any?
   errors.add(:finish_week, 'cannot be in another Period')
 end
end

Answer 1

这应该有效：

 scope :overlapping, ->(integer) do
   where '(start_week <= :integer and finish_week >= :integer) or ' \
         '(start_week > finish_week and (start_week <= :integer or finish_week >= :integer))', 
         integer: integer
 end

如何为整数范围创建不重叠的验证

1 个答案: