相关疑难解决方法(0)

我有这个。

@login_manager.user_loader
def load_user(id=None):
     return User.query.get(id)

在我介绍 Flask-Principal 之前，它运行良好。

@identity_loaded.connect_via(app)
def on_identity_loaded(sender, identity):

    # Set the identity user object
    identity.user = current_user
    # return
    if hasattr(current_user, 'id'):
        identity.provides.add(UserNeed(current_user.id))

    # Assuming the User model has a list of roles, update the
    # identity with the roles that the user provides
    if hasattr(current_user, 'roles'):
        for role in current_user.roles:
            identity.provides.add(RoleNeed(role.name))

添加它会导致严重的性能问题。SQLALCHEMY_ECHO 显示每次加载静态文件时都会查询 User 表。

#Warning: Dummy Cache
users = {}
@login_manager.user_loader
def load_user(uid=None):
    if uid not in users:
        users[uid] = User.query.get(uid)
    return users[uid] …