I would like to import some nodes from csv file using feed_import module in Drupal 7. The original CSV file has around 500k entries and I have to do some filtering before importing. (the result will be under 40k).
Now, I have seen on drupal.org that feed_import has the possibility of adding some filters, but I cannot find the way to apply them.
Anyways I haven't seen nothing about the lenght of the field or about the type of content (numeric, alphanumeric, letters only), and I have to filter on these criteria.
Can that be made? Or should I try to do the filtering in PHP before using feed_importer?