Class: ActiveRecord::Fixtures

Inherits:
Object
  • Object
show all
Defined in:
lib/rails3_pg_deferred_constraints/fixtures.rb

Class Method Summary collapse

Class Method Details

.create_fixtures(fixtures_directory, table_names, class_names = {}) ⇒ Object

it is almost original method except using TRUCTATE for all tables with one query instead of deleting records table by table with DELETE FROM



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# File 'lib/rails3_pg_deferred_constraints/fixtures.rb', line 16

def self.create_fixtures(fixtures_directory, table_names, class_names = {})
  table_names = [table_names].flatten.map { |n| n.to_s }
  table_names.each { |n|
    class_names[n.tr('/', '_').to_sym] = n.classify if n.include?('/')
  }

  # FIXME: Apparently JK uses this.
  connection = block_given? ? yield : ActiveRecord::Base.connection

  files_to_read = table_names.reject { |table_name|
    fixture_is_cached?(connection, table_name)
  }

  unless files_to_read.empty?
    connection.disable_referential_integrity do
      fixtures_map = {}

      fixture_files = files_to_read.map do |path|
        table_name = path.tr '/', '_'

        fixtures_map[path] = ActiveRecord::Fixtures.new(
          connection,
          table_name,
          class_names[table_name.to_sym] || table_name.classify,
          ::File.join(fixtures_directory, path))
      end

      all_loaded_fixtures.update(fixtures_map)

      connection.transaction(:requires_new => true) do
        
        quoted_tables = fixture_files.map(&:table_rows).flatten.map(&:keys).flatten.map{ |t| connection.quote_table_name(t) }
        connection.delete "TRUNCATE #{quoted_tables.join(', ')}"

        fixture_files.each do |ff|
          conn = ff.model_class.respond_to?(:connection) ? ff.model_class.connection : connection
          table_rows = ff.table_rows

          table_rows.each do |table_name,rows|
            rows.each do |row|
              conn.insert_fixture(row, table_name)
            end
          end
        end

        # Cap primary key sequences to max(pk).
        if connection.respond_to?(:reset_pk_sequence!)
          table_names.each do |table_name|
            connection.reset_pk_sequence!(table_name.tr('/', '_'))
          end
        end
      end

      cache_fixtures(connection, fixtures_map)
    end
  end
  cached_fixtures(connection, table_names)
end