Method: DTWorker#do_batch_copy

Defined in:
lib/datatransit/rule_dsl.rb

#do_batch_copy(sourceCls, targetCls, task, pk = nil, in_batch = false) ⇒ Object 



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# File 'lib/datatransit/rule_dsl.rb', line 163

def do_batch_copy (sourceCls, targetCls, task, pk = nil, in_batch = false)
  count = sourceCls.where(task.search_cond).size.to_f
  return if count <= 0
  
  how_many_batch = (count / @batch_size).ceil
  #the progress bar
  bar = ProgressBar.new(count)
  
  if in_batch 
    0.upto (how_many_batch-1) do |i|  
      sourceCls.where(task.search_cond).find_each(
        start: i * @batch_size, batch_size: @batch_size) do |source_row|
        
        #update progress
        bar.increment!
        
        if task.filter
          next if do_filter_out task.filter, source_row
        end
        target_row = targetCls.new source_row.attributes

        #activerecord would ignore pk field, and the above initialization will result nill primary key.
        #here the original pk is used in the target_row, it is what we need exactly.
        if pk 
          target_row.send( "#{pk}=", source_row.send("#{pk}") )
        end

        target_row.save
      end
    end
  else
    sourceCls.where(task.search_cond).each do |source_row|
      #update progress
      bar.increment!
      
      if task.filter
        next if do_filter_out task.filter, source_row
      end
      target_row = targetCls.new source_row.attributes

      #activerecord would ignore pk field, and the above initialization will result nill primary key.
      #here the original pk is used in the target_row, it is what we need exactly.
      if pk 
        target_row.send( "#{pk}=", source_row.send("#{pk}") )
      end

      target_row.save
    end
  end
  
  
end