如何在flask中创建数据库时自动在flask-sqlalchemy中插入行

pip install Flask
pip install Flask-SQLAlchemy

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = '数据库连接地址'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)

    def __init__(self, username, email):
        self.username = username
        self.email = email

pip install Flask-Migrate

flask db init

flask db migrate -m "initial migration"

flask db upgrade

@app.before_first_request
def insert_rows():
    with app.app_context():
        # 在这里执行插入行数据的操作
        user = User(username='admin', email='admin@example.com')
        db.session.add(user)
        db.session.commit()