Class: ActiveRecord::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/inherits_many.rb

Constant Summary collapse

@@passes_on_to = 
{}
@@inherits_many = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.inherits_many(source, params) ⇒ Object 



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

def self.inherits_many(source, params)
  unless @@inherits_many.has_key? self.name
    @@inherits_many[self.name] = []
  end
  @@inherits_many[self.name] << {source: source}.merge(params)
end

.passes_on_to(target, params) ⇒ Object 



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# File 'lib/inherits_many.rb', line 6

def self.passes_on_to(target, params)
  unless @@passes_on_to.has_key? self.name
    @@passes_on_to[self.name] = []
  end
  @@passes_on_to[self.name] << {target: target}.merge(params)
end

Instance Method Details

#process_inherits_many ⇒ Object 



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# File 'lib/inherits_many.rb', line 72

def process_inherits_many

  concrete_class = self.class

  while concrete_class.name != 'ActiveRecord::Base' do

    unless @@inherits_many[concrete_class.name].nil?

      @@inherits_many[concrete_class.name].each do |tt|

        child = tt[:source]
        parent = tt[:from]
        parent_id = "#{parent}_id"

        # if the chain has changed ..
        # if chain_id_changed?
        if self.changes.has_key? parent_id

          parent_id_was = self.changes[parent_id][0]
          parent_id_is = self.changes[parent_id][1]

          # if there was previously a chain ..
          if parent_id_was

            # remove all the menus from the old chain.
            self.send("#{child}=", self.send(child) - self.class.reflect_on_association(parent).class_name.constantize.find(parent_id_was).send(child))

          end

          # if there is a new chain ..
          if parent_id_is

            # add all the menu items from the new chain to this restaurant.
            self.send("#{child}=", self.send(child) + self.send(parent).send(child))

          end


          # if there was previously a chain ..
          if parent_id_was

            # remove all restaurants from the old chain.
            # self.restaurants = self.restaurants - Chain.find(chain_id_was).restaurants
            self.send("#{child}=", self.send(child) - self.class.reflect_on_association(parent).class_name.constantize.find(parent_id_was).send(child))

          end

          # if there is a new chain ..
          if parent_id_is

            # add all the menu items from the new chain to this restaurant.
            self.send("#{child}=", self.send(child) + self.send(parent).send(child))

          end

        end
      end

    end

    concrete_class = concrete_class.superclass

  end

end

#process_passes_on_to ⇒ Object 



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# File 'lib/inherits_many.rb', line 14

def process_passes_on_to

  concrete_class = self.class

  while concrete_class.name != 'ActiveRecord::Base' do

    unless @@passes_on_to[concrete_class.name].nil?

      @@passes_on_to[concrete_class.name].each do |tt|

        child = tt[:target]
        parent = tt[:of]
        parent_id = "#{parent}_id"

        # if the chain has changed ..
        # if chain_id_changed?
        if self.changes.has_key? parent_id

          parent_id_was = self.changes[parent_id][0]
          parent_id_is = self.changes[parent_id][1]

          # if there was previously a chain ..
          if parent_id_was

            # remove all restaurants from the old chain.
            # self.restaurants = self.restaurants - Chain.find(chain_id_was).restaurants
            self.send("#{child}=", self.send(child) - self.class.reflect_on_association(parent).class_name.constantize.find(parent_id_was).send(child))

          end

          # if there is a new chain ..
          if parent_id_is

            # add all the menu items from the new chain to this restaurant.
            self.send("#{child}=", self.send(child) + self.send(parent).send(child))

          end

        end
      end
    end

    concrete_class = concrete_class.superclass

  end

end