RuntimeError: Working outside of application context.
This typically means that you attempted to use functionality that needed
the current application. To solve this, set up an application context
with app.app_context(). See the documentation for more information.
官方文档：
If you try to access
current_app, or anything that uses it, outside an application context, you’ll get this error message:If you see that error while configuring your application, such as when initializing an extension, you can push a context manually since you have direct access to the
app. Use app_context() in a with block, and everything that runs in the block will have access to current_app.If you see that error somewhere else in your code not related to configuring the application, it most likely indicates that you should move that code into a view function or CLI command.
https://blog.csdn.net/weixin_44936542/article/details/112175582
作者：_gitignore
链接：https://www.jianshu.com/p/05e468fbdda3
来源：简书
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