将验证传递给控制器​​轨道

Question

如何检查验证是否为真并在控制器中的条件下使用它？

模型

validate :no_reservation_overlap

scope :overlapping, ->(period_start, period_end) do
  where "((date_start <= ?) and (date_end >= ?))", period_end, period_start
end

private

def no_reservation_overlap
  if (Reservation.overlapping(date_start, date_end).any?)
     errors.add(:date_end, 'it overlaps another reservation')
  end
end

链接了解更多信息：Date range overlap per user rails

我希望能够检查验证是否为真并将其传递给控制器​​

控制器

   if validation == true 
      #do something
   end 

我尝试使用on: create来阻止它执行create操作。

Answer 1

只需在ActiveRecord对象上调用valid?即可。例如：

@reservation = Reservation.new(reservation_params)

if @reservation.valid?
  # Do something if any validation fails
  if @reservation.errors[:date_end].include? 'it overlaps another reservation' 
    # Do something if the overlapping validation fails
  end
end

您可以在Ruby on Rails Guide

中详细了解有关验证的信息

如果您想检查特定的验证错误，可以查看this Stack Overflow question。

Answer 2

if @user.valid? do something end