Flask-SQLAlchemy, and many other ORMs, refer to the process of adding sample data to the database as "seeding" the database. In this lesson, we'll see some of the conventions and built-in features ...

Support the compatibility between flask_sqlalchemy and flask_sqlalchemy_lite. It allows users to make minimal changes when they need to migrate from either one of these two packages to each other.

在Flask应用程序中，SQLAlchemy可以轻松地与Flask集成，这使得创建和管理数据库变得更加容易。在下面的讲解中，我们将学习如何使用Flask和SQLAlchemy来建立，查询，修改和删除数据库模型。

SQLAlchemy 会自动判断，如果对象对应的记录已存在，就更新而不是添加。 SQLAlchemy 还支持批量更新，比如我们要将所有岁数小于 20 的人都加 1 岁： ...