自定义验证Rails模型

Question

I have a contact form and would like to show individual messages depending on what has failed.I would like to use flash messages. So from what i have read so far i can create a custom method (or i think it just overrides the one in place?)

So for example, i want to validate the presence of the name field

Class Message

attr_accessor :name
validates :name, :presence => true

def validate
 if self.name < 0
  errors.add(:name, "Name cannot be blank")
 end
end
end

Within my controller i normally use a generic message

flash.now.alert = "Please Ensure all Fields are filled in"

Is there a way to call the particular message that failed validation?

Thanks

Answer 1

有可用的插件，您可以按照以下网址进行操作

https://github.com/jeremydurham/custom-err-msg

Answer 2

检查方法是否有效，因为您可以传递带有所需消息的message参数。

validates :name, :presence => {:message => 'The name can't be blank.'}