Module: Versioned::ClassMethods

Defined in:
lib/versioned.rb

Instance Method Summary collapse

Instance Method Details

#locking!(options = {}) ⇒ Object 



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# File 'lib/versioned.rb', line 52

def locking!(options = {})
  include(LockingInstanceMethods)
  class_inheritable_accessor :version_lock_key
  self.version_lock_key = options[:key] || :lock_version
  key self.version_lock_key, Integer

  if self.respond_to?(:version_use_key)
    self.version_use_key = self.version_lock_key
    (self.version_except_columns ||= []) << self.version_lock_key.to_s #don't version the lock key 
  end
end

#versioned(options = {}) ⇒ Object 



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# File 'lib/versioned.rb', line 64

def versioned(options = {})
  class_inheritable_accessor :version_only_columns
  self.version_only_columns = Array(options[:only]).map(&:to_s).uniq if options[:only]
  class_inheritable_accessor :version_except_columns
  self.version_except_columns = Array(options[:except]).map(&:to_s).uniq if options[:except]

  class_inheritable_accessor :version_use_key
  self.version_use_key = options[:use_key]

  many :versions, :as => :versioned, :order => 'number ASC', :dependent => :delete_all do
    def between(from, to)
      from_number, to_number = number_at(from), number_at(to)
      return [] if from_number.nil? || to_number.nil?
      condition = (from_number == to_number) ? to_number : Range.new(*[from_number, to_number].sort)
      if condition.is_a?(Range)
        conditions = {'$gte' => condition.first, '$lte' => condition.last}
      else
        conditions = condition
      end
      find(:all, 
        :number => conditions,
        :order => "number #{(from_number > to_number) ? 'DESC' : 'ASC'}"
      )
    end

    def at(value)
      case value
        when Version then value
        when Numeric then find_by_number(value.floor)
        when Symbol then respond_to?(value) ? send(value) : nil
        when Date, Time then last(:created_at => {'$lte' => value.to_time})
      end
    end

    def number_at(value)
      case value
        when Version then value.number
        when Numeric then value.floor
        when Symbol, Date, Time then at(value).try(:number)
      end
    end
  end

  after_create :create_initial_version
  after_update :create_initial_version, :if => :needs_initial_version?
  after_update :create_version, :if => :needs_version?

  include InstanceMethods
  alias_method_chain :reload, :versions
end