August 2018
Intermediate to advanced
230 pages
6h 42m
Chinese
Content preview from Flask Web开发：基于Python的Web应用开发实战（第2版）
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第 17章
部署
Flask
自带的
Web
开发服务器不够稳健、安全和高效，不适合在生产环境中使用。本章介
绍几种不同的
Flask
应用部署方式。
17.1
部署流程
不管使用哪种托管方案，应用安装到生产服务器上之后，都要执行一系列任务，其中就包
括创建或更新数据库表。
如果每次安装或升级应用都手动执行这些任务，那么会容易出错，也浪费时间。因此，可
以在
flasky.py
中添加一个命令，自动执行全部任务。
示例
17-1
实现了一个适用于
Flasky
的 deploy 命令。
示例
17-1
flasky.py
：deploy 命令
from flask_migrate import upgrade
from app.models import Role, User
@app.cli.command()
def deploy():
"""Run deployment tasks."""
# 把数据库迁移到最新修订版本
upgrade()
# 创建或更新用户角色
Role.insert_roles()
# 确保所有用户都关注了他们自己
User.add_self_follows()
184
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