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我试图使用烧杯缓存与SQLAlchemy,但我一直在收到错误。使用烧杯缓存和SQLAlchemy
这是我的表格定义。
class Post(Base):
....
....
user = relation(User, primaryjoin = User.id == id)
tags = relation('Tags', backref = 'posts')
class Tags(Base):
...
...
user = relation(User, primaryjoin = User.id == id)
post = relation(Post, primaryjoin = Post.id == id)
烧杯缓存与其他SQLAlchemy类一起工作,除了这些类。
当我运行该程序时,我收到以下错误;
DetachedInstanceError: Parent instance <Post at 0x101f90b10> is not bound to a Session; lazy load operation of attribute 'user' cannot proceed.
我搜索StackOverflow上,并在另一个线程,我需要禁用延迟加载所以我改了行已经找到
user = relation(User, primaryjoin = User.id == id)
到
user = relation(User, primaryjoin = User.id == id, lazy='dynamic')
但这在模板中出现以下错误(post.user.fullname
);
AttributeError: 'AppenderQuery' object has no attribute 'fullname'
我在做什么错?