Ruby on rails RubyonRails-验证属性和关联的模型属性

我有两种型号：

class ModelA < ApplicationRecord
  has_many: :model_b
end

class ModelB < ApplicationRecord
  belongs_to: :model_a
end

我是Rails新手，不知道该怎么做

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谢谢

您需要添加自定义验证

class ModelA < ActiveRecord::Base
  has_many: :model_b
end

class ModelB < ActiveRecord::Base
  belongs_to : model_a
  validates :is_between_parent_period

  private

  def is_between_parent_period
    unless start_date.between?(self.model_a.start_date, self.model_a.end_date) && end_date.between?(self.model_a.start_date, self.model_a.end_date)
      errors.add(:base, 'Must be between parent start date and end date')
    end
  end
end

classmodela

检查两个日期或时间范围A和B是否重叠需要覆盖很多情况：

A partially overlaps B
A surrounds B
B surrounds A
A occurs entirely after B
B occurs entirely after A

要进行简单的重叠检查，可以在模型A中创建方法，然后将其他模型（模型b）作为参数传递

class ModelA < ActiveRecord::Base
  has_many: :model_b

  # Check if a given interval overlaps this interval    
  def overlaps?(other)
    (self.start_date - other.end_date) * (other.start_date - self.end_date) >= 0
  end
end

classmodela=0
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您的答案很有用，我将使用此代码进行验证。谢谢

class ModelA < ActiveRecord::Base
  has_many: :model_b

  # Check if a given interval overlaps this interval    
  def overlaps?(other)
    (self.start_date - other.end_date) * (other.start_date - self.end_date) >= 0
  end
end