Rails - Validate Presence Of Association?

Question

I have a model A that has a \"has_many\" association to another model B. I have a business requirement that an insert into A requires at least 1 associated record to B. Is

Answer 1

If you want to ensure that the association is both present and guaranteed to be valid, you also need to use

class Transaction < ActiveRecord::Base
  belongs_to :bank

  validates_associated :bank
  validates :bank, presence: true
end