def get_cover_id(olkeys):
"""Return the first cover from the list of ol keys."""
for olkey in olkeys:
doc = ol_get(olkey)
if not doc:
continue
is_author = doc['key'].startswith("/authors")
covers = doc.get('photos' if is_author else 'covers', [])
# Sometimes covers is stored as [None] or [-1] to indicate no covers.
# If so, consider there are no covers.
if covers and (covers[0] or -1) >= 0:
return covers[0]
def get_cover_id(olkeys):
"""Return the first cover from the list of ol keys."""
for olkey in olkeys:
doc = ol_get(olkey)
if not doc:
continue
if doc['key'].startswith("/authors"):
covers = doc.get('photos', [])
else:
covers = doc.get('covers', [])
# Sometimes covers is stored as [-1] to indicate no covers. Consider it as no covers.
if covers and covers[0] >= 0:
return covers[0]