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Versions: 5
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Contents
module Popular
# Friendship class. Provides self-referential join for popular_models and their friends
class Friendship < ::ActiveRecord::Base
belongs_to :popular_model, polymorphic: true
belongs_to :friend, polymorphic: true
validates_presence_of :friend, :popular_model
# Ensures that popular_models cannot add themselves as a friend
validate :ensure_popular_model_different_from_friend
private
# Checks friend against popular_model.
#
# TODO add more descriptive error message/i18n
def ensure_popular_model_different_from_friend
errors.add( :friend ) if friend == popular_model
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems