Flask-migrate 未检测到模式更改

Question

我正在尝试了解 flask 和 sqlalchemy works.Below 是我的应用程序结构

init.py包含

import os
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
import User

# Create a login manager object
login_manager = LoginManager()

app = Flask(__name__)

# Often people will also separate these into a separate config.py file
app.config['SECRET_KEY'] = 'mysecretkey'
basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)
Migrate(app, db)

model.py

from test import db
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import UserMixin



class User(db.Model, UserMixin):
    # Create a table in the db
    __tablename__ = 'users'

    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(64), unique=True, index=True)


    def __init__(self, email, username, password,first_name,last_name):
        self.email = email

和app.py

# This is app.py, this is the main file called.
from test import app
from flask import render_template


@app.route('/')
def index():
    return 'Hello World'


if __name__ == '__main__':
    app.run(debug=True)

我正在使用以下命令创建 tables

设置FLASK_APP=
烧瓶数据库初始化
flask db migrate -m

但 flask migrate 未检测到 table 并显示以下消息

我不知道如何解决这个问题issue.Could有人请强调我在做什么wrong.Thanks

Answer 1

您需要 import model 在 __init__.py

import os
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
import User

# Create a login manager object
login_manager = LoginManager()

app = Flask(__name__)

# Often people will also separate these into a separate config.py file
app.config['SECRET_KEY'] = 'mysecretkey'
basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)
Migrate(app, db)
from app import model

这是因为model.py依赖于__init__.py

Flask-migrate 未检测到模式更改

Flask-migrate No changes in schema detected

python-3.x

flask

flask-sqlalchemy

flask-migrate

sqlalchemy-migrate