Question

我想从当前的flask应用程序配置中获取route args默认值，但是我收到了这个错误。

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 473, in spawn_worker
    worker.init_process()
  File "/usr/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 100, in init_process
    self.wsgi = self.app.wsgi()
  File "/usr/lib/python2.7/dist-packages/gunicorn/app/base.py", line 115, in wsgi
    self.callable = self.load()
  File "/usr/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 33, in load
    return util.import_app(self.app_uri)
  File "/usr/lib/python2.7/dist-packages/gunicorn/util.py", line 362, in import_app
    __import__(module)
  File "/home/hamid/projects/bfl/develop.py", line 4, in <module>
    application = create_app(DevelopmentConfig)
  File "/home/hamid/projects/bfl/project/application.py", line 56, in create_app
    configure_blueprints(app)
  File "/home/hamid/projects/bfl/project/application.py", line 97, in configure_blueprints
    bp = __import__('project.apps.%s' % blueprint_name, fromlist=['views'])
  File "/home/hamid/projects/bfl/project/apps/store/views/__init__.py", line 6, in <module>
    from .store import *
  File "/home/hamid/projects/bfl/project/apps/store/views/store.py", line 193, in <module>
    @mod.route('/<page>/', defaults={'per_page': current_app.config['PAGE_SIZE']})
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 338, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 297, in _get_current_object
    return self.__local()
  File "/usr/local/lib/python2.7/dist-packages/flask/globals.py", line 34, in _find_app
    raise RuntimeError('working outside of application context')
RuntimeError: working outside of application context

这是我的示例代码：

@mod.route('/<page>/', defaults={'per_page': current_app.config['PAGE_SIZE']})
@mod.route('/<per_page>/<page>/')
@login_required
def index(per_page, page):
    pagination_obj = Pagination(Store.objects(is_dealer=False), per_page, page)
    return render('store/index.html', pagination=pagination_obj)

任何想法如何从当前应用程序配置中获取路径默认值？

Answer 1

current_app只能访问"request context"中的“config”字典。

要在请求上下文之外访问配置值，您可以使用此自定义方法：

from . import app
def getConfig(key):
    with app.app_context():
        if key in current_app.config:
            return current_app.config.get(key)
        else:
            raise Exception("Custom Message")

Answer 2

你的代码看起来不错。

由于在您拥有current_app.config['PAGE_SIZE']的行中出现错误，您可以调试并确认此变量实际存在吗？

通过@mod装饰器，我猜你正在使用蓝图。因此，current_app可能不是您应用的名称，或者您尚未正确导入current_app。或者，您还没有为您的app正确设置配置变量。

最后，在什么情况下你会收到这个错误？访问哪个URL？还是在测试环境中？

总之：错误可能不在你分享的代码中。

从当前应用配置设置烧瓶路线默认值

2 个答案: