python - Flask flask.cli.NoAppException 与应用工厂

Question

我正在尝试将我的配置设置拆分为一个 config.py 文件中的不同类，如记录的那样 here

我已将我的项目分成如下文件夹:

/bloggy
    autoapp.py
    config.py
    /app
        __init__.py
        models.py
        views.py
        /static
        /templates

我的 config.py 如下所示

import os
basedir = os.path.abspath(os.path.dirname(__file__))


class Config(object):
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'secret key'
    SQLALCHEMY_TRACK_MODIFICATIONS = True
    SQLALCHEMY_MIGRATE_REPO = os.path.join(basedir, 'db_repository')


class DevelopmentConfig(Config):
    DEBUG = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///' + os.path.join(basedir, 'db.sqlite3')


class TestingConfig(Config):
    TESTING = True


config = {
    'development': DevelopmentConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}

我有一个应用程序工厂文件 autoapp.py 用于从所需的环境变量创建我的 Flask 应用程序

import os
from app import create_app
app = create_app(os.getenv('FLASK_CONFIG') or 'default')

我的 app/__init__.py 如下所示:

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from config import config

db = SQLAlchemy()


def create_app(config_name):
    app = Flask(__name__)
    app.config.from_object(config[config_name])
    db.init_app(app)
    return app

运行后

$ export FLASK_APP=autoapp.py

和

$ export FLASK_DEBUG=1

并启动服务器:

$ flask 运行

我收到以下错误:

Traceback (most recent call last):
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 178, in __call__
    self._flush_bg_loading_exception()
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 166, in _flush_bg_loading_exception
    reraise(*exc_info)
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 155, in _load_app
    self._load_unlocked()
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 170, in _load_unlocked
    self._app = rv = self.loader()
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 231, in load_app
    rv = locate_app(self.app_import_path)
  File "/home/jwe/.local/lib/python3.5/site-packages/flask/cli.py", line 95, in locate_app
    'is .py' % module)
flask.cli.NoAppException: The file/path provided (autoapp) does not appear to exist.  Please verify the path is correct.  If app is not on PYTHONPATH, ensure the extension is .py

我是否可以让我的应用程序使用 config.py 中列出的设置，或者我应该采用不同的方法吗？

Answer 1

也许添加 flask 应用程序的名称会有所帮助。喜欢以下内容:

app.config.from_object(bloggy.config[config_name])

参见 here在 flask 文档中。