如何在蓝图中访问app.config？

Question

我试图authorisation.py在包api中的蓝图内访问访问应用程序配置.我正在初始化__init__.py其中使用的蓝图authorisation.py.

__init__.py

from flask import Blueprint
api_blueprint = Blueprint("xxx.api", __name__, None)
from api import authorisation

authorisation.py

from flask import request, jsonify, current_app

from ..oauth_adapter import OauthAdapter
from api import api_blueprint as api

client_id = current_app.config.get('CLIENT_ID')
client_secret = current_app.config.get('CLIENT_SECRET')
scope = current_app.config.get('SCOPE')
callback = current_app.config.get('CALLBACK')

auth = OauthAdapter(client_id, client_secret, scope, callback)


@api.route('/authorisation_url')
def authorisation_url():
    url = auth.get_authorisation_url()
    return str(url)

我得到RuntimeError:在应用程序上下文之外工作

我明白为什么会这样,但是访问这些配置设置的正确方法是什么？

----更新----暂时,我已经这样做了.

@api.route('/authorisation_url')
def authorisation_url():
    client_id, client_secret, scope, callback = config_helper.get_config()
    auth = OauthAdapter(client_id, client_secret, scope, callback)
    url = auth.get_authorisation_url()
    return str(url)

Answer 1

您可以用flask.current_app蓝图代替app.

from flask import current_app as app
@api.route('/info/', methods = ['GET'])
def get_account_num():
    num = app.config["INFO"]

注:该current_app代理仅在的情况下可要求.

Answer 2

重载record方法似乎很容易:

api_blueprint = Blueprint('xxx.api',  __name__, None)
api_blueprint.config = {}

@api_blueprint.record
def record_params(setup_state):
  app = setup_state.app
  api_blueprint.config = dict([(key,value) for (key,value) in app.config.iteritems()])

Answer 3

在tbicr的答案的基础上,这是一个覆盖register方法示例的示例:

from flask import Blueprint

auth = None

class RegisteringExampleBlueprint(Blueprint):
    def register(self, app, options, first_registration=False):
        global auth

        config = app.config
        client_id = config.get('CLIENT_ID')
        client_secret = config.get('CLIENT_SECRET')
        scope = config.get('SCOPE')
        callback = config.get('CALLBACK')

        auth = OauthAdapter(client_id, client_secret, scope, callback)

        super(RegisteringExampleBlueprint,
              self).register(app, options, first_registration)

the_blueprint = RegisteringExampleBlueprint('example', __name__)

以及使用record装饰器的示例:

from flask import Blueprint
from api import api_blueprint as api

auth = None

# Note there's also a record_once decorator
@api.record
def record_auth(setup_state):
    global auth

    config = setup_state.app.config
    client_id = config.get('CLIENT_ID')
    client_secret = config.get('CLIENT_SECRET')
    scope = config.get('SCOPE')
    callback = config.get('CALLBACK')

    auth = OauthAdapter(client_id, client_secret, scope, callback)

Answer 4

蓝图有注册蓝图时调用的register方法.因此,您可以覆盖此方法或使用装饰器来描述依赖于的逻辑.recordapp

Answer 5

该current_app方法很好，但是您必须具有一些请求上下文。如果您没有（例如一些前期工作，例如测试），最好放置

with app.test_request_context('/'):

在这个current_app电话之前。

您将拥有RuntimeError: working outside of application context。

Answer 6

您需要导入app由以下命令返回的主变量（或您所称的任何名称）Flask()：

from someplace import app
app.config.get('CLIENT_ID')

或者从请求中执行此操作：

@api.route('/authorisation_url')
def authorisation_url():
    client_id = current_app.config.get('CLIENT_ID')
    url = auth.get_authorisation_url()
    return str(url)