View source  
  <?php
include_once 'farm_ledger.features.inc';
function farm_ledger_farm_ui_entities() {
  return array(
    'log' => array(
      'farm_purchase' => array(
        'label' => t('Purchase'),
        'label_plural' => t('Purchases'),
        'view' => 'farm_log_purchase',
        'areas' => TRUE,
        'weight' => 90,
      ),
      'farm_sale' => array(
        'label' => t('Sale'),
        'label_plural' => t('Sales'),
        'view' => 'farm_log_sale',
        'areas' => TRUE,
        'weight' => 90,
      ),
    ),
  );
}
function farm_ledger_feeds_importer_default_alter(&$importers) {
  
  $names = array(
    'log_farm_sale',
    'log_farm_purchase',
  );
  foreach ($names as $name) {
    if (!empty($importers[$name])) {
      
      $mappings = array(
        array(
          'source' => 'Invoice number',
          'target' => 'field_farm_invoice_number',
          'unique' => FALSE,
          'language' => 'und',
        ),
        array(
          'source' => 'Lot number',
          'target' => 'field_farm_lot_number',
          'unique' => FALSE,
          'language' => 'und',
        ),
        array(
          'source' => 'Quantity',
          'target' => 'field_farm_quantity_value',
          'unique' => FALSE,
          'language' => 'und',
        ),
        array(
          'source' => 'Units',
          'target' => 'field_farm_quantity_units',
          'term_search' => '0',
          'autocreate' => 1,
          'unique' => FALSE,
          'language' => 'und',
        ),
        array(
          'source' => 'Unit price',
          'target' => 'field_farm_unit_price',
          'unique' => FALSE,
          'language' => 'und',
        ),
        array(
          'source' => 'Total price',
          'target' => 'field_farm_total_price',
          'unique' => FALSE,
          'language' => 'und',
        ),
      );
      
      if ($name == 'log_farm_sale') {
        $mappings[] = array(
          'source' => 'Customer',
          'target' => 'field_farm_customer',
          'unique' => FALSE,
          'language' => 'und',
        );
      }
      elseif ($name == 'log_farm_purchase') {
        $mappings[] = array(
          'source' => 'Seller',
          'target' => 'field_farm_seller',
          'unique' => FALSE,
          'language' => 'und',
        );
      }
      
      $importer_mappings =& $importers[$name]->config['processor']['config']['mappings'];
      $importer_mappings = array_merge($importer_mappings, $mappings);
    }
  }
}