Importing entries fails when ids are not numbers

[Coolnesss]

When trying to import entries from a database table where the ids are not numbers (do not match the regular expression /(d+)/). The issue exists here and here where the inappropriate regex is used.

The error is

~ craj$ contentful-importer --configuration=settings.yml import-entries
I, [2016-07-11T10:00:52.587691 #13345]  INFO -- : Remove directory threads/0 from data/threads path.
I, [2016-07-11T10:00:52.589402 #13345]  INFO -- : Processing collection: country
/Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:77:in `new_entry_name': undefined method `[]' for nil:NilClass (NoMethodError)
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:81:in `copy_entry'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:50:in `block in process_collection_files'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:49:in `glob'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:49:in `process_collection_files'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:33:in `block in split_entries'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:29:in `glob'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:29:in `split_entries'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/data_organizer.rb:19:in `execute'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/parallel_importer.rb:31:in `import_data'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/import_entries.rb:14:in `import'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/lib/contentful/importer/import_entries.rb:19:in `run'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/claide-0.8.2/lib/claide/command.rb:312:in `run'
    from /Users/craj/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/contentful-importer-0.2.2/bin/contentful-importer:12:in `<top (required)>'
    from /Users/craj/.rbenv/versions/2.3.1/bin/contentful-importer:23:in `load'
    from /Users/craj/.rbenv/versions/2.3.1/bin/contentful-importer:23:in `<main>'

I managed to fix this by changing the mentioned lines to

"#{content_type_id}_#{File.basename(entry_path, '.*').split("_").last}.json"

and

content_type_id = File.basename(entry_path).split("_").first

I'm not sure if that's the best way though.