Module: Sequel::Plugins::BallotVotable

Defined in:
lib/sequel/plugins/ballot_votable.rb

Overview

The votable plugin marks the model as containing objects that can be voted on. It creates a polymorphic one-to-many relationship from the Votable model to Ballot::Sequel::Vote.

This may be used with single_table_inheritance, but should be loaded after single_table_inheritance has been called. It has not been tested with class_table_inheritance.

This plug-in causes Ballot::Votable to be included into the affected model, and Ballot::Votable::ClassMethods to be extended onto the affected model.

Defined Under Namespace

Modules: InstanceMethods

Class Method Summary collapse

Class Method Details

.apply(model) ⇒ Object

:nodoc:



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# File 'lib/sequel/plugins/ballot_votable.rb', line 17

def self.apply(model) # :nodoc:
  require 'ballot/sequel/vote'
  require 'ballot/words'
  require 'ballot/votable'

  model.instance_eval do
    if columns.include?(:cached_ballot_summary)
      plugin :serialization, :json, :cached_ballot_summary
    end

    # Create a polymorphic one-to-many relationship for votables. Based
    # heavily on the one_to_many implementation from sequel_polymorphic,
    # but customized to sequel-voting's needs.
    one_to_many :ballots_for,
      key: :votable_id,
      reciprocal: :votable,
      reciprocal_type: :one_to_many,
      conditions: { votable_type: Ballot::Sequel.type_name(model) },
      adder: ->(many_of_instance) {
        many_of_instance.update(
          votable_id: pk,
          votable_type: Ballot::Sequel.type_name(model)
        )
      },
      remover: ->(many_of_instance) { many_of_instance.delete },
      clearer: -> { ballots_for_dataset.delete },
      class: '::Ballot::Sequel::Vote'

    include Ballot::Votable
    extend Ballot::Votable::ClassMethods
  end
end