Question

我在虚拟环境中安装Flask-SQLAlchemy。我正在安装Flask-Migrate： pip安装flask-migrate

创建了一个类config.py：

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

class Config(object):
    SECRET_KEY = os.environ.get('SECRET_KEY') or '*********'    
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'sqlite:///' + os.path.join(basedir, 'app.db')  
    SQLALCHEMY_TRACK_MODIFICATIONS = False

在models.py中，我有两个模型：

from datetime import datetime
from app import db

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), index=True, unique=True)
    email = db.Column(db.String(120), index=True, unique=True)
    password_hash = db.Column(db.String(128))
    posts = db.relationship('Post', backref='author', lazy='dynamic')

    def __repr__(self):
        return '<User {}>'.format(self.username)

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    body = db.Column(db.String(140))
    timestamp = db.Column(db.DateTime, index=True, default=datetime.utcnow)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))

    def __repr__(self):
        return '<Post {}>'.format(self.body)

仅在testapp.py中：

from app import app

在文件 init .py

中

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from config import Config

app = Flask(__name__)
app.config.from_object(Config)
db = SQLAlchemy(app)
migrate = Migrate(app, db)

from app import routes, models

构建我的应用程序：

testapp\
  venv\
  app\
    templates\
        base.html
        index.html
        login.html 
    __init__.py
    routes.py
    forms.py
    models.py    
  testapp.py
  config.py

在Python解释器会话中，执行以下操作从app.models导入用户并得到一个错误：

(venv) C:\Users\User\testapp>python
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 24 2018, 00:16:47) [MSC v.1916 
64 bit
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from app.models import User
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "C:\Users\User\testapp\app\__init__.py", line 4, in <module>
     from config import Config
   File "C:\Users\User\testapp\config.py", line 8
     SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
                                                                 ^
TabError: inconsistent use of tabs and spaces in indentation
 >>>

设置新配置模块的环境变量设置FLASK_APP = config.py

当我执行命令时：

flask db init

完整的错误日志：

(venv) C:\Users\User\testapp>flask db init
Usage: flask db init [OPTIONS]

Error: Failed to find Flask application or factory in module "config". Use "FLAS
K_APP=config:name to specify one.

(venv) C:\Users\User\testapp>

我在做什么错？帮助

Answer 1

在cmd中运行此命令

export FLASK_APP=testapp.py

之前

flask db init

在模块“ config”中找不到Flask应用程序或工厂。使用“ FLASK_APP = config：name”指定一个

1 个答案: