gistfile1.yml

python_preamble:
- import: base64
- import: re
- import: google.appengine.ext.bulkload.transform
- import: google.appengine.ext.bulkload.bulkloader_wizard
- import: google.appengine.ext.db
- import: google.appengine.api.datastore
- import: bulkload_helper

transformers:

- kind: Layer
  connector: csv
  connector_options:
    encoding: utf_8
  
  property_map:
    - property: __key__
      import_template: "%(layer_source)s-%(layer_collection)s-%(layer_filename)s"

    - property: source
      external_name: layer_source
      import_transform: transform.none_if_empty(str)

- kind: LayerIndex
  connector: csv
  connector_options:
    encoding: utf_8

  property_map:
    - property: __key__
      import_template: "%(layer_source)s-%(layer_collection)s-%(layer_filename)s"
      import_transform: bulkload_helper.create_layer_index_key()
  
  post_import_function: bulkload_helper.add_polygons