flask-admin 如何实现“列过滤”

Question

class Shop(db.Model):
    __tablename__ = 'shop'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(20), unique=True)

class Category(db.Model):
    __tablename__ = 'category'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    shop_id = db.Column(db.Integer, db.ForeignKey('shop.id'), nullable=False)
    shop = db.relationship('Shop')
    name = db.Column(db.String(20))

class Food(db.Model):
    __tablename__ = 'food'
    id = db.Column(db.Integer, primarykey=True, autoincrement=True)
    shop_id = db.Column(db.Integer, db.ForeignKey('shop.id'), nullable=False)
    shop = db.relationship('Shop')
    category_id = db.Column(db.Integer, db.ForeignKey('category.id'), nullable=False)
    category = db.relationship('Category')
    name = db.Column(db.String(20))

问题如下：
如何实现，根据Shop里的内容，过滤掉Shop里没有的Category
即：Shop为“路边烧烤摊”，对应的Category应该什么都不显示

flask-admin英文资料多，但是本人英语不好。希望好心人指定迷津，谢谢啦