Add lots of dates and extents to the ASPACE accession CSV importer

accession_converter.rb

# add this plugin to plugins/local/backend/model/accession_converter.rb

# this plugin allows the CSV importer to have columns like date_3_label, date_3_expression, 
# extent_2_type, extent_2_container_summary etc. 

class AccessionConverter < Converter

  # we alias the old configure method...
  self.singleton_class.send(:alias_method,:old_configure, :configure)
  
  def self.configure
     config = {}
     
     # lets make 10 sets of date columns
     10.times do |ii|
       i = ii.to_s 
       config.merge!({  "date_#{i}_label" => "date_#{i}.label",
        "date_#{i}_expression" => "date_#{i}.expression",
        "date_#{i}_begin" => "date_#{i}.begin",
        "date_#{i}_end" => "date_#{i}.end",
        "date_#{i}_type" => "date_#{i}.date_type" })
   
      config.merge!(
        { "date_#{i.to_s}".intern => {
            :record_type => :date,
            :defaults => date_defaults,
            :on_row_complete => Proc.new { |queue, date|
              queue.select {|obj| obj.class.record_type == 'accession'}.each do |accession|
                accession.dates << date
              end
            }
          }
        }
      )
        #and 10 sets of extent columns
       config.merge!({
           "extent_#{i}_type" => "extent_#{i}.extent_type",
           "extent_#{i}_container_summary" => "extent_#{i}.container_summary",
           "extent_#{i}_number" => "extent_#{i}.number"
       })
    
       config.merge!({
       "extent_#{i}".intern => {
                :record_type => :extent, 
                :defaults => {:portion => 'whole'},
               :on_row_complete => Proc.new { |queue, extent|
                 queue.select {|obj| obj.class.record_type == 'accession'}.each do |accession|
                   accession.extents << extent
                 end
               }
             } 
       })
     
    end
   # and we add that to the rest of our configuration
    config.merge(self.old_configure) 

  end

end