Module: ActiveRecord::Acts::List::SequentialUpdatesMethodDefiner

Defined in:
lib/acts_as_list/active_record/acts/sequential_updates_method_definer.rb

Overview

:nodoc:

Class Method Summary collapse

Class Method Details

.call(caller_class, column, sequential_updates_option) ⇒ Object 



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# File 'lib/acts_as_list/active_record/acts/sequential_updates_method_definer.rb', line 4

def self.call(caller_class, column, sequential_updates_option)
  caller_class.class_eval do
    define_method :sequential_updates? do
      if !defined?(@sequential_updates)
        if sequential_updates_option.nil?
          table_exists =
            if active_record_version_is?('>= 5')
              caller_class.connection.data_source_exists?(caller_class.table_name)
            else
              caller_class.connection.table_exists?(caller_class.table_name)
            end
          index_exists = caller_class.connection.index_exists?(caller_class.table_name, column, unique: true)
          @sequential_updates = table_exists && index_exists
        else
          @sequential_updates = sequential_updates_option
        end
      else
        @sequential_updates
      end
    end

    private :sequential_updates?
  end
end