Python Flask-运行时错误：在应用程序上下文之外工作

我在flask应用程序中收到“RuntimeError:在应用程序上下文之外工作”错误，我很难理解原因。我曾尝试推送应用程序上下文，但这似乎对我不起作用，我可能只是对如何访问“当前_应用程序”有点困惑，这样我就可以从其他类和蓝图中写入日志。我的代码如下：

run.py：

#! /usr/bin/python3.6
from caffeine import create_app
import os

app = create_app()

SECRET_KEY = b'\x84\xde=\xc4\x1c%r\xf9Bt\xd3\xce\xc4o\xae\xf7'
app.secret_key = SECRET_KEY

if __name__ == '__main__':
    app.run(debug=False, host="0.0.0.0", port=8000)

init.py：

import os
import logging
from flask import session
from datetime import timedelta
from pathlib import Path
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from caffeine.config import Config

# Create db instance
db = SQLAlchemy()

# create login manager instance
login_manager = LoginManager()

def create_app():
    """
    Iinstantiates and initialize the Flask application
    """
    app = Flask(__name__)
    app.config.from_object(Config)
    db.init_app(app)
    login_manager.init_app(app)
    login_manager.login_view = 'bp_auth.login'
    login_manager.refresh_view = 'bp_auth.login'
    login_manager.login_message_category = 'info'

    # import Blueprint objects for routes
    from caffeine.routes.bp_aiq_bundle import main
    from caffeine.routes.bp_auth import auth
    from caffeine.routes.bp_bundle import bundle
    from caffeine.routes.bp_aiq import aiq
    from caffeine.errors.handlers import errors
    app.register_blueprint(main)
    app.register_blueprint(auth)
    app.register_blueprint(bundle)
    app.register_blueprint(aiq)
    app.register_blueprint(errors)

    @app.before_request
    def before_request():
        session.permanent = True
        app.permanent_session_lifetime = timedelta(minutes=1440)

    # instantiate logger
    gunicorn_logger = logging.getLogger('gunicorn.error')
    app.logger.handlers = gunicorn_logger.handlers
    app.logger.setLevel(gunicorn_logger.level)

    return app

bp_bundle.py（蓝图）：

堆栈跟踪：

Traceback (most recent call last):
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/workers/base.py", line 119, in init_process
    self.load_wsgi()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 49, in load
    return self.load_wsgiapp()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/util.py", line 358, in import_app
    mod = importlib.import_module(module)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/Users/aclinton/Documents/projects/caffeine/run.py", line 5, in <module>
    app = create_app()
  File "/Users/aclinton/Documents/projects/caffeine/caffeine/__init__.py", line 32, in create_app
    from caffeine.routes.bp_bundle import bundle
  File "/Users/aclinton/Documents/projects/caffeine/caffeine/routes/bp_bundle.py", line 19, in <module>
    current_app.logger.error('hi')
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/werkzeug/local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/werkzeug/local.py", line 306, in _get_current_object
    return self.__local()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/flask/globals.py", line 52, in _find_app
    raise RuntimeError(_app_ctx_err_msg)
RuntimeError: Working outside of application context.

回溯（最近一次呼叫最后一次）：
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/arbiter.py”，第583行，在spawn_worker中
worker.init_进程（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/workers/base.py”，第119行，在初始化过程中
self.load_wsgi（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/workers/base.py”，第144行，在load_wsgi中
self.wsgi=self.app.wsgi（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/app/base.py”，wsgi第67行
self.callable=self.load（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/app/wsgiapp.py”，第49行，已加载
返回self.load_wsgiapp（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/app/wsgiapp.py”，第39行，在load_wsgiapp中
return util.import\u app（self.app\u uri）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/gunicorn/util.py”，第358行，在导入应用程序中
mod=importlib.import\u模块（模块）
文件“/usr/local/cillar”/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/_init__uuu.py”，导入模块第127行
return _bootstrap._gcd_import（名称[级别：]，包，级别）
文件“”，第1030行，在_gcd_import中
文件“”，第1007行，在“查找”和“加载”中
文件“”，第986行，在“查找”和“加载”中解锁
文件“”，第680行，在\u加载\u解锁
exec_模块中第790行的文件“”
文件“”，第228行，在调用中删除了帧
文件“/Users/aclinton/Documents/projects/caffee/run.py”，第5行，在
app=create_app（）
文件“/Users/aclinton/Documents/projects/caffeine/caffeine/_init__.py”，第32行，在创建应用程序中
从caffeine.routes.bp_bundle导入bundle
文件“/Users/aclinton/Documents/projects/caffeine/caffeine/routes/bp_bundle.py”，第19行，在
当前应用程序记录器错误（'hi'）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/werkzeug/local.py”，第347行，位于__
返回getattr（self.\u get\u current\u object（），name）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/werkzeug/local.py”，第306行，位于当前对象中
返回self.\uuu local（）
文件“/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site packages/flask/globals.py”，第52行，在“查找”应用程序中
raise RUNTIMERROR（\u app\u ctx\u err\u msg）
运行时错误：在应用程序上下文之外工作。

当您从caffee.routes.bp\u bundle import bundle导入模块时，

将执行最外层的全局语句。现在，应用程序未运行，此模块正在尝试使用当前的应用程序。把它放在烧瓶里，它就会起作用。
所以它起作用了，效果很好。那么，当我从一个类实例化一个对象时，该类还需要执行日志记录呢。如果没有蓝图或路线，我将如何引用那里的记录器？例如，在我从一个类实例化一个对象的路由中，我应该在该类中导入什么才能使用记录器？一旦应用程序运行，您就可以使用
current\u app
记录您想要的任何内容。在那之前没有。有很多方法可以记录日志。其中一种方法是写入标准输出/错误，并让gunicorn之类的流程管理器将其放入适当的日志文件中。因此，在尝试从该类登录时，我仍然收到一个错误。因此，在“bp_bundle.py”路径中，我实例化了一个对象。在该类中，我执行以下操作：“从flask导入当前_应用程序”，在我的类init中，我尝试记录，但是我得到了应用程序上下文错误。尝试使用Python的日志库，而不是flask中的记录器。这将解决您当前应用程序的问题。
Traceback (most recent call last):
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/workers/base.py", line 119, in init_process
    self.load_wsgi()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 49, in load
    return self.load_wsgiapp()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/gunicorn/util.py", line 358, in import_app
    mod = importlib.import_module(module)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/Users/aclinton/Documents/projects/caffeine/run.py", line 5, in <module>
    app = create_app()
  File "/Users/aclinton/Documents/projects/caffeine/caffeine/__init__.py", line 32, in create_app
    from caffeine.routes.bp_bundle import bundle
  File "/Users/aclinton/Documents/projects/caffeine/caffeine/routes/bp_bundle.py", line 19, in <module>
    current_app.logger.error('hi')
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/werkzeug/local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/werkzeug/local.py", line 306, in _get_current_object
    return self.__local()
  File "/Users/aclinton/Documents/environments/caff_env/lib/python3.9/site-packages/flask/globals.py", line 52, in _find_app
    raise RuntimeError(_app_ctx_err_msg)
RuntimeError: Working outside of application context.