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
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