如何使用jinja过滤和显示flask sqlalchemy一对多关系数据

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class Parent(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    children = db.relationship('Child', backref='parent', lazy=True)

class Child(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    parent_id = db.Column(db.Integer, db.ForeignKey('parent.id'))

from flask import Flask, render_template

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

@app.route('/')
def index():
    parents = Parent.query.all()
    return render_template('index.html', parents=parents)

{% for parent in parents %}
    <h3>{{ parent.name }}</h3>
    <ul>
        {% for child in parent.children %}
            <li>{{ child.name }}</li>
        {% endfor %}
    </ul>
{% endfor %}