过滤多-多关系结果(flask sqlalchemy)

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'your_database_uri'
db = SQLAlchemy(app)

# 定义多对多关系的中间表
association_table = db.Table('association',
    db.Column('user_id', db.Integer, db.ForeignKey('user.id')),
    db.Column('group_id', db.Integer, db.ForeignKey('group.id'))
)

# 定义User模型
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    groups = db.relationship('Group', secondary=association_table, backref='users')

# 定义Group模型
class Group(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))

# 查询属于某个特定组的用户
group_name = 'Group A'
users = User.query.join(User.groups).filter(Group.name == group_name).all()