Flask-SQLAlchemy Extension Because SQLAlchemy is a common database abstraction layer and object relational mapper that requires a little bit of configuration effort, there is a Flask extension that handles that into models.py): from sqlalchemy import Table, Column, Integer, String from sqlalchemy.orm import mapper from yourapplication.database import metadata, db_session class User(object): query = db_session primary_key=True), Column('name', String(50), unique=True), Column('email', String(120), unique=True) ) mapper(User, users) Querying and inserting works exactly the same as in the example above. SQL Abstraction

Flask-SQLAlchemy Extension Because SQLAlchemy is a common database abstraction layer and object relational mapper that requires a little bit of configuration effort, there is a Flask extension that handles that into models.py): from sqlalchemy import Table, Column, Integer, String from sqlalchemy.orm import mapper from yourapplication.database import metadata, db_session class User(object): query = db_session primary_key=True), Column('name', String(50), unique=True), Column('email', String(120), unique=True) ) mapper(User, users) Querying and inserting works exactly the same as in the example above. SQL Abstraction

{% block head %} 元素，这个元素会设置页面的视口，让页 面根据设备的宽度来自动缩放页面，让移动设备拥有更好的浏览体验： 第二处，新的页面添加了一个导航栏：