验证相关模型导轨

Question

I have several model associations in one form. I would like to validate the presence of each nested attribute.

I have the Product model, and for example I have this:

Product.rb

  has_many :ships, :dependent => :destroy
  has_many :sizes, :dependent => :destroy

  accepts_nested_attributes_for :ships
  attr_accessible :ships_attributes
  attr_accessible :size_tokens
  attr_reader :size_tokens

So I would like to validate the presence of :ships and :size_tokens when I send the action of my product's form. How can I validate the presence of those attributes?

Thanks a lot.

Answer 1

You can use validates_presence_of for both. You can find a detailed explanation in here .