class Singer(db.Model):
__name__ = "singer"
singer_id = db.Column(db.String(15), primary_key=True)
gender = db.Column(db.String(6))
region = db.Column(db.String(45))
age = db.Column(db.String(11))
singer_name = db.Column(db.String(45))
class Sing(db.Model):
__name__ = "sing"
song_song_id = db.Column(db.String(15), primary_key=True)
singer_singer_id = db.Column(
db.String(15), db.ForeignKey(
'singer.singer_id')) # , db.ForeignKey('singer.singer_id')
class Song(db.Model):
__name__ = "song"
song_id = db.Column(db.String(15), primary_key=True)
song_name = db.Column(db.String(250))
lyrics = db.Column(db.Text)
play_times = db.Column(db.String(11))