class BookInfoStub:
- _empty_fields = ['cover_url', 'variant_of']
+ _empty_fields = ['cover_url', 'variant_of', 'license']
# allow single definition for multiple-value fields
_salias = {
'authors': 'author',
+ 'genres': 'genre',
+ 'epochs': 'epoch',
+ 'kinds': 'kind',
}
def __init__(self, **kwargs):