未找到应用程序。要么在视图函数中工作，要么推送应用程序上下文

我试图将 Flask-SQLAlchemy 模型分离到单独的文件中，当我试图运行 db.create_all()时，我得到 No application found. Either work inside a view function or push an application context.

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from flask_sqlalchemy import SQLAlchemy


db = SQLAlchemy()

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from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from shared.db import db


app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'My connection string'
db.init_app(app)

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from shared.db import db


class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
email_address = db.Column(db.String(300), unique=True, nullable=False)
password = db.Column(db.Text, nullable=False)

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最佳答案

Use with app.app_context() to push an application context when creating the tables.

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'My connection string'
db.init_app(app)


with app.app_context():
db.create_all()