配置模块的“运行时错误：在应用程序上下文之外工作”

Question

我有一个从主文件调用的 config.py 模块，它有各种 app.configs 用于 jinja2filters 和我正在使用的其他一些插件：

config.py 的摘录：

from flask import current_app as app  
#imports go here

def function1:
    print("hello")

app.config['PROPERTY_1'] = 'configgoeshere'

#jinja2 functions and configs would go here like
app.jinja_env.filters['datetime'] = datetimeformat

从 index.py 调用：

from flask import Flask, flash, render_template, jsonify, request, json, request, redirect, url_for, Response, send_from_directory

app = Flask(__name__)
app.config['DEBUG'] = False

app.config.from_object('config') #config file

############################################################################################################################
# MAIN ROUTES
############################################################################################################################
# The route for the homepage
@app.route('/')
def index():

返回错误：

RuntimeError: working outside of application context

更新 我现在正在尝试传递应用程序上下文，这里是 index.py：

from flask import Flask, flash, render_template, jsonify, request, json, request, redirect, url_for, Response, send_from_directory
import time, datetime, os, urllib, urllib2, urlparse, requests, json, string
from urllib2 import Request, urlopen, URLError, HTTPError, urlparse

app = Flask(__name__)
app.config['DEBUG'] = False

app.config.from_object('config')


############################################################################################################################
# MAIN ROUTES
############################################################################################################################
# The route for the homepage
@app.route('/')
def index():

这是更新后的摘录 config.py：

from index import app
#imports go here

def function1:
    print("hello")

app.config['PROPERTY_1'] = 'configgoeshere'

#jinja2 functions and configs would go here like
app.jinja_env.filters['datetime'] = datetimeformat

返回的错误是：

$ python index.py
Traceback (most recent call last):
  File "index.py", line 8, in <module>
    app.config.from_object('config')
  File "C:\Python27\lib\site-packages\flask\config.py", line 162, in from_object
    obj = import_string(obj)
  File "C:\Python27\lib\site-packages\werkzeug\utils.py", line 418, in import_string
    __import__(import_name)
  File "C:\Users\****\Desktop\*****\config.py", line 1, in <module>
    from index import app
  File "C:\Users\***\Desktop\*****\index.py", line 17, in <module>
    @app.route('/')
  File "C:\Python27\lib\site-packages\werkzeug\local.py", line 343, in __getattr__
    return getattr(self._get_current_object(), name)
  File "C:\Python27\lib\site-packages\werkzeug\local.py", line 302, in _get_current_object
    return self.__local()
  File "C:\Python27\lib\site-packages\flask\globals.py", line 34, in _find_app
    raise RuntimeError('working outside of application context')
RuntimeError: working outside of application context

注意 - config.py 中的第 162 行没有代码，就像错误提示的那样

Answer 1

查看 Flask 对Application Contexts的解释。

在您的config.py文件中，from flask import current_app as app它使得调用app.config['PROPERTY_1'] = 'configgoeshere'实际尝试将配置设置为 on current_app，尽管默认情况下没有应用程序上下文，直到请求进入（因此出现错误）。由于该调用不在函数内，因此它会在其他任何事情（如请求）发生之前立即执行。

我建议app在 index 中的实例上而不是 on 上进行配置current_app。