sqlalchemy的布尔字段查询

Question

Postgres模型:

class Song(db.Model):
    id3_parsed = db.Column(db.Boolean, server_default=u'false')

运行以下查询会给出正确的计数:

select count(*) from song where id3_parsed is false;

但是我怎么用flask-sqlalchemy呢？这不起作用:

songs = Song.query.filter(Song.id3_parsed == False).all()

Answer 1

songs = Song.query.filter(Song.id3_parsed.is_(False)).all()