python - Python Flask 获取全局配置 current_app 的问题如何解决？

Question

• 启动文件：app.py
• 业务文件：data.py
• 缓存类库：cache.py

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现在问题是在 data.py 里调用了 cache.py 而 cache.py 为了初始化缓存插件使用了 current_app

from flask_caching import Cache as FlaskCachefrom flask import current_appclass Cache:    instance = FlaskCache(current_app, config=current_app.config['Cache'])    @classmethod    def set(cls, key: str, value: str, timeout: int = 600):        if not cls.instance.has(key):            cls.instance.set(key, value, timeout=timeout)    @classmethod    def get(cls, key: str):        return cls.instance.get(key)

但是就挂了：RuntimeError: Working outside of application context.

因为是中间隔了一层我用了 with app.app_context(): 也不行，请问要怎么解决？
难道必须要放在 app.py 初始化然后去 import cache from app ？

Answer 1

可以在Cache里添加一个方法

@classmethoddef init_app(cls,app,config):    cls.instance.init_app(app,config=config)

然后再app.py里

from cache import Cacheapp = Flask(___name__)Cache.init_app(app,app.config['Cache']) 

这样就不用从app导入Cache

Answer 2

app.py 文件里初始化：

from flask import Flaskfrom flask_caching import Cacheapp = Flask(__name__)cache = Cache(app, config=app.config['Cache'])