Displaying 1 result from an estimated 1 matches for "find_by_title_and_author_id".
2005 Dec 29
3
Verification problems
...ates_uniqueness_of :name
end
class Book < ActiveRecord::Base
belongs_to :author
has_many :catalog
validates_presence_of :author, :message => "doesn''t exist!"
validates_associated :author
# Each book title must be unique to each author.
def validate
if Book.find_by_title_and_author_id(self.title, self.author_id)
errors.add(:title, "(#{self.title}) already exists for this author
(#{self.author.name})")
end
end
end
class Catalog < ActiveRecord::Base
belongs_to :book
validates_presence_of :book
validates_associated :book
end
NOTE: The above is a c...