Rails - Dec 2006 - validates_presence_of :relation_id & validates_associated :relation together

I''m trying to make sure that my foreign key exist and it''s a
valid
one. Can I somehow use both : validates_presence_of :relation_id &
validates_associated :relation ?

My model looks like following :
==class Product < ActiveRecord::Base
  belongs_to :category
  validates_presence_of :category_id
  validates_associated :category

  attr_protected :category_id

  def validate
    #errors.add(:category_id, "is invalid") unless
Category.exists?(category_id)
  end
end
==
validates_presence_of :relation_id fails when the @relation is a new (
and valid ) object.

In short, I want the following test to pass :

def test_new_product
    p = Product.new products(:cream).attributes
    c = Category.new :name => "Facial"

    assert c.valid?
    p.category = c
    assert p.valid?

    p.category = nil
    assert !p.valid?
end
-- 
rm -rf / 2>/dev/null - http://null.in

Dont judge those who try and fail, judge those who fail to try..

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Pratik wrote:
> I''m trying to make sure that my foreign key exist and
it''s a valid
> one. Can I somehow use both : validates_presence_of :relation_id &
> validates_associated :relation ?
> 
> My model looks like following :
> ==> class Product < ActiveRecord::Base
>   belongs_to :category
>   validates_presence_of :category_id
>   validates_associated :category
> 
>   attr_protected :category_id
> 
>   def validate
>     #errors.add(:category_id, "is invalid") unless
Category.exists?(category_id)
>   end
> end
> ==> 
> validates_presence_of :relation_id fails when the @relation is a new (
> and valid ) object.
> 
> In short, I want the following test to pass :
> 
> def test_new_product
>     p = Product.new products(:cream).attributes
>     c = Category.new :name => "Facial"
> 
>     assert c.valid?
>     p.category = c
>     assert p.valid?
> 
>     p.category = nil
>     assert !p.valid?
> end
You want

   validates_presence_of :category
   validates_associated :category

-- 
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