Question

这是我的目录

hotel/
___grandluis/
______main/
______static/
______templates/
______users/
______config.py
______models.py
___migrations/
______versions/
___run.py
___app.db

我的问题是我希望我的app.db位于grandluis文件夹中。因为每次我运行python run.py db migrate。我的app.db在grandluis文件夹之外创建，当我通过我的应用程序向数据库添加内容时，它在grandluis文件夹内创建了另一个app.db。我不喜欢我的烧瓶应用程序只读取grandluis文件夹内的app.db，而不读取grandluis文件夹外的app.db。因为它会导致错误。它说没有创建SQLAlchemy.model。因为我的应用程序仅读取grandluis内部的app.db。因此，我希望每次命令迁移时都希望它会创建/影响grandluis文件夹中的app.db。我真的想要一些答案的家伙，非常感谢您有时间阅读我的这个荒谬的问题。

-models.py-

from datetime import datetime
from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
from flask import current_app
from grandluis import db, loginManager
from flask_login import UserMixin

@loginManager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

class User(db.Model, UserMixin):
    UserId = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(300), nullable=False)
    address = db.Column(db.String(100), nullable=False)
    contact = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    username = db.Column(db.String(20), unique=True, nullable=False)
    password = db.Column(db.String(60), nullable=False)

class Room(db.Model):
    roomId = db.Column(db.Integer, primary_key=True)
    roomNum = db.Column(db.String(100), nullable=False)
    roomType = db.Column(db.String(100), nullable=False)
    roomPrice = db.Column(db.Integer, nullable=False)
    roomStatus = db.Column(db.String(100), nullable=False)
class Meals(db.Model):
    mealId = db.Column(db.Integer, primary_key=True)
    mealName = db.Column(db.String(100), nullable=False)
    mealType = db.Column(db.String(100), nullable=False)
    mealPrice = db.Column(db.String(100), nullable=False)
    mealStatus = db.Column(db.String(100), nullable=False)

class Service(db.Model):
    serId = db.Column(db.Integer, primary_key=True)
    serName = db.Column(db.String(100), nullable=False)
    serPrice = db.Column(db.String(100), nullable=False)
    serStatus = db.Column(db.String(100), nullable=False)

class Guest(db.Model, UserMixin):
    GuestId = db.Column(db.Integer, primary_key=True)
    firstName = db.Column(db.String(100), nullable=False)
    lastName = db.Column(db.String(100), nullable=False)
    middleName = db.Column(db.String(100), nullable=False)
    address = db.Column(db.String(100), nullable=False)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    image_file = db.Column(db.String(20), nullable=False, default='default.jpg')
    password = db.Column(db.String(60), nullable=False)
    #posts = db.relationship('Post', backref='author', lazy=True)

    def get_reset_token(self, expires_sec=1800):
        s = Serializer(current_app.config['SECRET_KEY'], expires_sec)
        return s.dumps({'guest_id': self.id}).decode('utf-8')

    @staticmethod
    def verify_reset_token(token):
        s = Serializer(current_app.config['SECRET_KEY'])
        try:
            user_id = s.loads(token)['guest_id']
        except:
            return None
        return Guest.query.get(user_id)

    def __repr__(self):
        return f"Guest('{self.username}', '{self.email}', '{self.image_file}')"

-config.py-

class Config:
    SECRET_KEY = 'XXXXXXXXXXX'
    SQLALCHEMY_DATABASE_URI = 'sqlite:///app.db'
    MAIL_SERVER = 'smtp.googlemail.com'
    MAIL_PORT = 587
    MAIL_USE_TLS = True
    MAIL_USERNAME = 'xxxxxx@gmail.com'
    MAIL_PASSWORD = 'xxxxxx'

-run.py-

from grandluis import db, createApp
from flask_migrate import MigrateCommand
from flask_script import Manager

app = createApp()
manager = Manager(app)
manager.add_command('db', MigrateCommand)

if __name__ == '__main__':
    manager.run()

Answer 1

我认为问题出在Config.py python文件中。您应该正确指定数据库的路径。像这样更改代码

首先将os库导入config.py文件。

import os

然后创建一个变量。就我而言，我将该变量命名为basedir

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

现在，您可以指定数据库的路径。如下更改您的SQLALCHEMY_DATABASE_URI

 SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
                                  'sqlite:///' + os.path.join(basedir, 'hotel\\grandluis\\app.db')
 SQLALCHEMY_TRACK_MODIFICATIONS = False

转到您的run.py python文件并进行这些更改

from grandluis import db, createApp
from flask_migrate import MigrateCommand
from flask_script import Manager
fro flask_sqlalchemy import SQLAlchemy

app = createApp()
db = SQLAlchemy(app)
manager = Manager(app)
manager.add_command('db', MigrateCommand)

db.init_app(app)
db.app = app
db.create_all()

if __name__ == '__main__':
    manager.run()

我希望每次命令迁移时都在包文件夹中自动创建app.db

1 个答案: