Python 烧瓶生产开发模式
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flask production and development mode
提问by Abdellah ALAOUI ISMAILI
I have developed an application with flask, and I want to publish it for production, but I do not know how to make a separation between the production and development environment (database and code), have you documents to help me or code. I specify in the config.py file the two environment but I do not know how to do with.
我用flask开发了一个应用，想发布到生产环境中，但是不知道生产环境和开发环境如何分离（数据库和代码），有没有文档帮助我或者代码。我在 config.py 文件中指定了这两个环境但我不知道如何处理。
class DevelopmentConfig(Config):
"""
Development configurations
"""
DEBUG = True
SQLALCHEMY_ECHO = True
ASSETS_DEBUG = True
DATABASE = 'teamprojet_db'
print('THIS APP IS IN DEBUG MODE. YOU SHOULD NOT SEE THIS IN PRODUCTION.')
class ProductionConfig(Config):
"""
Production configurations
"""
DEBUG = False
DATABASE = 'teamprojet_prod_db'
采纳答案by Nathan Wailes
To add onto Daniel's answer:
添加丹尼尔的回答：
Flask has a page in its documentation that discusses this very issue.
Since you've specified your configuration in classes, you would load your configuration with app.config.from_object('configmodule.ProductionConfig')
由于您已经在类中指定了配置，因此您可以使用 app.config.from_object('configmodule.ProductionConfig')
回答by Daniel Corin
One convention used is to specify an environment variable before starting your application.
使用的一种约定是在启动应用程序之前指定环境变量。
For example
例如
$ ENV=prod; python run.py
In your app, you check the value of that environment variable to determine which config to use. In your case:
在您的应用程序中，您检查该环境变量的值以确定要使用的配置。在你的情况下：
run.py
run.py
import os
if os.environ['ENV'] == 'prod':
config = ProductionConfig()
else:
config = DevelopmentConfig()
It is also worth noting that the statement
还值得注意的是，该声明
print('THIS APP IS IN DEBUG MODE. YOU SHOULD NOT SEE THIS IN PRODUCTION.')
prints no matter which ENVyou set since the interpreter executes all the code in the class definitions before running the rest of the script.
无论ENV您设置哪个都打印，因为解释器在运行脚本的其余部分之前执行类定义中的所有代码。
