def get_basic_artist_pictures(mbid):
"""
Make sure document and its dependencies are present and contain required data.
@param mbid: a string containing a MusicBrainz ID of an artist
@return: a CachedArtistPictures object containing minimal data set
"""
try:
artist_pictures = CachedArtistPictures.get(mbid)
if 'artist_name' not in artist_pictures:
raise ResourceNotFound
mmda_logger('db','present',artist_pictures._doc_type, artist_pictures.get_id)
except ResourceNotFound:
# overhead, but in most cases artist page
# is a place where user will go next anyway
artist_pictures = CachedArtistPictures.get_or_create(mbid)
artist = get_basic_artist(mbid)
artist_pictures.artist_name = artist.name
if 'aliases' in artist:
artist_pictures.artist_aliases = list(artist.aliases)
artist_pictures.save()
mmda_logger('db','store', artist_pictures)
return artist_pictures
