Module: ActiveRecord::Duplicate

Extended by:
ActiveSupport::Concern
Defined in:
lib/activerecord-duplicate/duplicate.rb,
lib/activerecord-duplicate/railtie.rb,
lib/activerecord-duplicate.rb

Defined Under Namespace

Modules: ClassMethods Classes: Railtie

Instance Method Summary collapse

Instance Method Details

#duplicate ⇒ Object 



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# File 'lib/activerecord-duplicate/duplicate.rb', line 11

def duplicate
  self.duplication_context = :original
    self.run_callbacks(:duplication) do
    dup.tap do |duplicate|
      duplicate.duplication_context = :duplicate
      duplicate.run_callbacks(:duplication) do
        attributes.each do |key, value|
          value = case true
          
          # Duplicate attribute if whitelisted
          when self.class.attr_duplicatable?(key)
            value
          
          # If not whitelisted, set to default value
          when (column = self.class.columns.detect { |c| c.name == key }).present?
            column.default
          
          else
            nil
          end
          
          duplicate.send(:"#{key}=", value)
        end
        
        self.class.reflect_on_all_associations.each do |association|
          name = association.name
          
          next unless self.class.attr_duplicatable?(name)
          macro = association.macro
          association = self.association(association.name)
          
          case macro
          when :belongs_to
            # Duplicate all belongs_to associations.
            if duplication_parent.is_a?(association.klass)
              duplicate.send(:"#{name}=", duplication_parent)
              duplicate.send(:"#{name}_id=", nil)
            else
              duplicate.send(:"#{name}=", send(name))
            end
          
          when :has_many
            # Duplicate all has_many associations.
            duplicate.send(:"#{name}=", send(name).map do |object|
              object.duplication_parent = duplicate
              object = object.duplicate
              next unless object.present?
              
              object
            end.compact)
          end
        end
      end
    end
  end
end