Rails 验证没有失败

Question

我对模型字段进行了以下验证：

validates :invoice_date, :presence => true, :unless => Proc.new { |invoice| invoice.invoice_date.future? }

看起来很简单，但是行不通。如果日期在未来，则不会抛出错误。在那种情况下 Proc 确实 returns false。

知道为什么没有显示任何验证错误吗？

Answer 1

像那样尝试:--

validate check_invoice_date_is_future

def check_invoice_date_is_future
 if invoice_date.present?
   errors.add(:invoice_date, "Should not be in future.") if invoice_date.future?
 else
   errors.add(:invoice_date, "can't be blank.")
 end
end

Answer 2

validates :invoice_date, :presence => true
validate :is_future_invoice_date?

private
 def is_future_invoice_date?
   if invoice_date.future?
     errors.add(:invoice_date, 'Sorry, your invoice date is in future time.')
   end
end

Presence true 只是确保 invoice_date 必须存在。为了验证日期是否为未来日期，我们指定了自定义验证方法。(is_future_invoice_date?) 如果日期是未来日期，此方法将针对我们的 invoice_date 属性添加错误消息。

更多信息在这里：http://guides.rubyonrails.org/active_record_validations.html#custom-methods

Answer 3

'unless' 条件用于决定验证是否应该运行，而不是决定是否应该成功或失败。所以你的验证本质上是说 "validate the presence of invoice_date, unless invoice_date is in the future in which case don't validate its presence" （这没有意义）

听起来你想要两个验证，存在和日期隔离。

validate :invoice_date_in_past

def invoice_date_in_past
  if invoice_date.future?
    errors.add(:invoice_date, 'must be a date in the past')
  end
end

Rails 验证没有失败

Rails validation not failing

validation

ruby-on-rails

proc