method

instantiate

v3.2.1 - Show latest stable - 0 notes - Class: ClassMethods

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What's this?

instantiate(record) public

Finder methods must instantiate through this method to work with the single-table inheritance model that makes it possible to create objects of different types from the same table.

Show source

# File activerecord/lib/active_record/inheritance.rb, line 61
      def instantiate(record)
        sti_class = find_sti_class(record[inheritance_column])
        record_id = sti_class.primary_key && record[sti_class.primary_key]

        if ActiveRecord::IdentityMap.enabled? && record_id
          if (column = sti_class.columns_hash[sti_class.primary_key]) && column.number?
            record_id = record_id.to_i
          end
          if instance = IdentityMap.get(sti_class, record_id)
            instance.reinit_with('attributes' => record)
          else
            instance = sti_class.allocate.init_with('attributes' => record)
            IdentityMap.add(instance)
          end
        else
          instance = sti_class.allocate.init_with('attributes' => record)
        end

        instance
      end

instantiate

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