Class: ActiveRecordStreamer

Inherits:
Object
  • Object
show all
Defined in:
lib/active-record-streamer.rb

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ ActiveRecordStreamer

Returns a new instance of ActiveRecordStreamer.



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# File 'lib/active-record-streamer.rb', line 4

def initialize(args = {})
  @args = args
  @klass = args[:query].klass
  @sql = @args[:query].to_sql
  @includes = @args[:query].includes_values
end

Instance Method Details

#each(&blk) ⇒ Object 



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# File 'lib/active-record-streamer.rb', line 15

def each(&blk)
  if @klass.respond_to?(:connection_without_octopus)
    @baza_db = Baza::Cloner.from_active_record_connection(@klass.connection_without_octopus)
  else
    @baza_db = Baza::Cloner.from_active_record_connection(@klass.connection)
  end

  begin
    cache = []

    @baza_db.query_ubuf(@sql) do |data|
      model = @klass.new

      if rails4?
        model.assign_attributes(data)
        model.instance_variable_set(:@new_record, false)
      else
        model.instance_variable_set(:@new_record, false)
        model.instance_variable_set(:@attributes, data.stringify_keys!)
      end

      cache << model

      if cache.length >= 1000
        yield_cache(cache, &blk)
        cache = []
      end
    end

    yield_cache(cache, &blk) if cache.any?
  ensure
    @baza_db.destroy
  end
end

#rails4? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active-record-streamer.rb', line 11

def rails4?
  @@rails4 ||= ActiveRecord::VERSION::STRING.start_with?('4')
end